COVID-19-associated stroke
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Parul Pahal, M.B.B.S[2], Moises Romo M.D.
Synonyms and keywords: COVID-19, SARS-CoV-2, stroke, CT scan, cerebrovascular disease, TPA, alteplase
Overview
Cerebral hemorrhage or cerebral ischemia disrupts cerebral perfusion and can lead to an acute neurologic condition, called stroke. Cerebrovascular complications have been reported in severe Coronavirus Disease 2019 (COVID-19). However, neurological complications are not very common in rapidly spreading COVID-19 which is caused by a novel coronavirus, severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). The presenting complaints in majority of stroke patients reported in different studies were respiratory complaints (shortness of breath, cough) and non-specific constitutional symptoms such as fever, malaise, etc., and stroke developed later in the course of the disease. This is thought to be due to COVID-19-associated coagulopathy. However, there are few case reports and studies that have mentioned specific neurological presenting complaints such as altered mental status, limb weakness, and aphasia. Various non-pulmonary features are being reported as the COVID-19 understanding is unfolding with the spike of cases and continuously rising number of cases globally.
Historical Perspective
- Mao et. al. in his study first reported neurological symptoms in COVID-19 patients hospitalized in Wuhan, China from January 16, 2020, to February 19, 2020. Neurological symptoms were reported in 78 patients out of 214 Covid-19 positive hospitalized patients. with COVID-19 in Wuhan, China. The stroke patients reported specifically were 14[1]. In this study, patients with cardiovascular risk factors who presented with severe systemic symptoms were at higher risk of stroke.
- Yaghi et. al. retrospectively examined stroke patients admitted across different locations of NYU Langone hospital in New York. In this study, incidence of 0.9% was observed in laboratory confirmed COVID-19 positive patients included in this study. Stroke diagnosis was proved by imaging, and cryptogenic stroke was seen in most of these patients. The mortality was much higher in stroke patients who were COVID-19 positive.
Classification
- There is no specific classification established for 'Stroke in COVID-19 patients'. It is same as the general classification of stroke.
- Stroke can be classified into
- Ischemic stroke: This can be due to
- Thrombosis (Large vessel or Small vessel thrombosis)
- Embolism
- Systemic hypoperfusion
- Hemorrhagic stroke: This can be due to
- Ischemic stroke: This can be due to
Pathophysiology
The most common type of stroke in patients with COVID-19 is ischemic.[2]
The exact pathophysiology of 'stroke in COVID-19' is not fully understood. However, it is thought that stroke in COVID-19 could be due to one of the following pathophysiologies-
- Sepsis induced coagulopathy in COVID-19 patients is thought to be contributing to microthromobosis. This is supported by elevation of D-dimer and C-reactive protein, which are hypercoagulability and inflammatory markers, in COVID-19 positive patients.
- The angiotensin-converting enzyme II (ACEII) receptors are also present on the vascular endothelial cells and neural cells in the brain . These receptors expressed in the brain are responsible for sympathoadrenal system regulation, and vascular autoregulation[3]. When the virus binds to these receptors, this vascular autoregulation is hampered and can lead to elevated blood pressure, eventually leading to rupture of the cerebral vessels and intracranial hemorrhage[4]. It does so by altering the balance of renin-angiotensin system which likely triggers endothelium dysfunction, organ damage, which eventually results in stroke[5].
- Viral Neurotropism and Neuroinvasion is another possible pathogenic mechanism for cerebrovascular accidents in COVID-19 patients. The coronaviruses usually cause mild respiratory illness, but the beta coronavirues are known to have a role in nervous system involvement[6]. The Novel coronavirus “severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)” is a beta coronavirus, similar to severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV)[7]. It,therefore, has infection mechanism and potential to invade the nervous system, similar to SARS-Cov and MERS-Cov[8]. The detection of virus in the cells of the brain on autopsy[9] (neural and capillary endothelial cells), and viral presence in the cerebrospinal fluid of the encephalitis patient infected with SARS-Cov-2[10] supports the neuro-invasiveness of the virus. The two possible routes are retrograde axonal transport (via nasal cavity) or hematogenous spread (via blood brain barrier endothelial cells)[9]. Once the virus reaches the brain, it attaches with the ACE II receptors.
- Direct entry into brain tissues from cribriform plate to brain[11]. This is one of the proposed mechanism as COVID-19 positive patients also presented with anosmia and hyposmia which possibly occurs due to viral effect on olfactory bulb, which is in close proximity to cribriform plate[1]
Further investigations should be done to better understand the mechanism of Stroke in patients with COVID-19.
Causes
Coronavirus disease 2019 (COVID-19) associated stroke is caused by SARS-CoV-2.
Differentiating COVID-19-associated stroke from other Diseases
Stroke associated with COVID-19 should be differentiated from other diseases that can have similar presentation as stroke. These include-
- Other COVID-19 associated neurological complications: Encephalitis, Encephalopathy, Meningitis, Seizure, Guillain-Barre syndrome, polyneuritis cranialis
- Neurologic in non-COVID patients: Transient Ischemic Attack, Encephalitis, Brain abscess, Hemiplegic Migraine, Seizures, Postictal paralysis, Cerebral venous sinus thrombosis, Cerebral neoplasm, Cerebral Infections (Meningitis, Encephalitis, Brain Abscess, Progressive multifocal leukoencephalopathy)
- Traumatic: Epidural hematoma, Subdural hematoma, Traumatic brain Injury
- Toxic and/or Metabolic: Hypoglycemia, Hyponatremia, Drug intoxication
- Syncope
- Lyme's disease
- Ear and Nose diseases: Benign Paroxysmal Positional Vertigo, Vestibular Neuronitis, Meniere's Disease
- Psychiatric: Malingering, Conversion disorder
- Paraneoplastic syndromes
- Autoimmune disorders: Multiple Sclerosis, Acute inflammatory demyelinating polyradiculoneuropathy(Guillain-Barre syndrome)
Stroke in COVID-19 positive patients vs. Stroke in non-COVID-19 patients:
A retrospective cohort study (15th March,2020 to 19th April,2020) conducted by Yaghi et. al. in hospitalized patients in New York Healthcare systems compared stroke characteristics in patients with and without COVID-19[12]. This study included 3,556 COVID-19 positive patients, out of which 32 patients were diagnosed with ischemic stroke based on imaging. These COVID-19 positive stroke patients were then compared with 46 hospitalized stroke patients without COVID-19. Based on findings of this study-
- Younger patient population (average age-63 years) as compared to relatively older patient population (average age-70 years) in non-COVID-19 patients.
- Severe stroke (National Institutes of Health Stroke Scale- average score 19) as compared to non-COVID patients with lesser average score (8) seen on National Institutes of Health Stroke Scale
- Higher D-dimer levels which point towards severe blood clotting (10,000 in this study). Relatively lower D-dimer levels (525 in this study) were seen in non-COVID patients.
- Mostly Cryptogenic stroke seen in COVID-19 patients.
- Increased mortality seen in COVID-19 patients.
- Most of COVID-19 patients did not have any history of prior stroke (only 3.1% reported stroke history) as opposed to non-COVID patient group in which prior history of stroke was reported in 13%.
- Non-COVID patients were more likely to have higher blood pressure levels.
Further studies are going on to understand the clinical characteristics specific to stroke in COVID-19 patients. It has been observed that the findings vary in different countries possibly due to racial/ethnicity variations. Since strokes have been reported in critically ill COVID-19 patients, hence, it is difficult to diagnose stroke in intubated and sedated COVID-19 patients.
Stroke in COVID-19 positive patients vs. Stroke in Influenza patients:
Out of 1916 COVID-19 patients (Emergency Department visits or were hospitalized with COVID-19) in retrospective cohort study which included patients from two academic hospitals in New York, 31 patients (1.6%) with median age 69 years, experienced acute ischemic stroke. The majority of these patients were men (58%). 8 patients (26%] had initial presentation as stroke while 23 had stroke over the course of the disease after testing positive for COVID-19.
Based on this study, the COVID-19 patients have much higher incidence of stroke when compared to influenza patients.[13]
Epidemiology and Demographics
The incidence of stroke in COVID-19 varies significantly depending on the study population.
- The prevalence of COVID-19-associated stroke varies in different studies (Table 1).
Date of publication | Country | Author | Number of patients | Severe infection | Neurological symptoms | Acute Cerebrovascular disease | Ischemic/Hemorrhagic Stroke |
---|---|---|---|---|---|---|---|
April 10, 2020 | Wuhan, China | Mao et al.[1] | 214 | 88 patients (41.1%), Mean age-58.2 years | 78 patients (36.4%) | 5 among severe [5.7%] infection group vs 1 [0.8%]) in non-severe group | Ischemic-4, Hemorrhagic-1 |
May 29, 2020 | Wuhan, China | Qin et al.[14] (Retrospective cohort study) | 1875 | 461 severe on admission | 50 patients ie. 15 among severe and 35 among mild on admission (Median age-70 years), 30 males and 20 females | Ischemic-90%, Hemorrhagic-10% | |
May 20, 2020 | New York | Yaghi et al.[12] (Retrospective cohort study) | 3556 | Stroke at the time of admission-14/32 (43.8%), eventually developed stroke during hospitalization-18 (56.2%) | 32 patients (0.9%) | Ischemic stroke- 32 | |
April 28, 2020 | New York city | Oxley et al.[15] | 5 | Large vessel stroke-5, Mean age-<50 years | |||
July 12, 2020 | New York | Valderrama et al. | 1 (52-year old male) | Ischemic stroke | |||
Table 1. Prevalence of COVID-19-associated stroke varies in different studies |
- The incidence of stroke in hospitalized COVID-19 patients is reported to be 0.9–2%[16].majority of them being ischemic subtype. The mortality in COVID-19 positive stroke patients is reported to be 39%[1].
- The ischemic stroke prevalence in COVID-19 patients is 1.6%.[16]
- A New York study published in May reported that the proportion of these strokes seem to be higher in younger men.[12] Most of these strokes are large vessel ischemic strokes and are catastrophic.
- In a retrospective observational case series of six stroke patients in a hospital in Italy, with lab confirmed COVID-19, the median age reported was 69 years. Ischemic stroke subtype was seen in 4 patients(67%) as compared to hemorrhagic which was only seen in 2 patients (33%). Vascular risk factors were seen in 5/6 patients, which included diabetes mellitus, arterial hypertension
- In a single center retrospective study conducted in Wuhan by Qin C. et al. which included 1875 laboratory-confirmed COVID-19 patients from january 27th, 2020, to March 5th, 2020, 50 patients had history of stroke. The median age of this study group was 63 years, with stroke patients relatively older(70 years) when compared to non-stroke patients (62 years).[14]
Stroke is one of the neurological manifestations in patients with severe infection.
There is limited information on COVID-19 patients with stroke who survived.
Risk Factors
Stroke in COVID-19 infected patients is seen in relatively young patients as compared to with non COVID-19 patients.
COVID-19 associated stroke in severe patients. This includes older population with comorbidities like diabetes, hypertension, etc. However, due to disparities in the stroke prevalence in different studies, no clear association has been established.
Screening
There is insufficient evidence to recommend routine screening for stroke in COVID-19 patients. However, if the patient presents with stroke, COVID-19 screening should be done.
Natural History, Complications, and Prognosis
Prognosis is generally poor for COVID-19 patients with stroke. A study reported a high proportion of these patients were admitted to the Intensive Care Unit(ICU) and required mechanical ventilation. The mortality of COVID-19 patients with stroke was much higher when compared to COVID-19 patients with no history of stroke[14].
Cerebral hemorrhage or ischemia disrupts cerebral perfusion and can lead to an acute neurologic condition, stroke. It is one of the neurological complications of SARS-Cov-2 infection, and is seen in critically ill COVID-19 patients. 5% of hospitalized COVID-19 patients with severe illness had acute stroke, with majority of patients with Ischemic stroke. The severe and critically ill patients when compared to moderate cases, had increased hypercoagulability and inflammatory markers. These patients are at higher risk for stroke. The better outcomes in critically ill patients who received prophylactic thrombolytic therapy points towards a possibility of hypercoagulability associated with COVID-19.[1]
Diagnosis
- Diagnosis of stroke associated to COVID-19 is based on history of symptoms development, physical examination, imaging findings, plus a positive COVID-19 test.
- There are no standard criteria for the evaluation of stroke associated to COVID-19.
- General management protocols for COVID-19-associated stroke should be established so that brain imaging can be realized as prompt as possible in patients who may be candidates for IV fibrinolysis or mechanical thrombectomy or both.[17]
- The current diagnostic approach for stroke associated to COVID-19 is the same as for people with non-COVID infection.
Diagnostic Study of Choice
- Non-contrast CT Scan of the brain within 20 minutes of arrival to the emergency department is the diagnostic test of choice for stroke in patients with COVID-19 infection.[18]
- MRI may detect smaller lesions with certainty if required, once the hemorrhagic stroke is excluded by non-contrast CT Scan.[19]
- In a patient who presents with neurological symptoms, RT-PCR for SARS-CoV-2 should be done as well.
History and Symptoms
- The extent of damage and symptoms which may result from stroke associated to COVID-19 highly depends on the site of infarction, the blood vessels involved, and the presence of other risk factors.[20][21][22]
- The majority of patients with COVID-19-associated stroke initially presented with respiratory symptoms (e.g. cough, shortness of breath etc) and constitutional features. These patients developed cerebrovascular signs and symptoms later in the course of disease.
- A few studies reported cases of patients with COVID-19 infection which presented with neurological symptoms suggestive of stroke (Table 2). Most of these patients had underlying history of chronic diseases such as diabetes mellitus, atrial fibrillation, etc.[23][24]
Patient no. | Onset of neurologic symptoms |
Age and Gender |
Neurologic Signs & Symptoms |
---|---|---|---|
1 | On Admission | 73-year old, Male | Respiratory distress, fever, and altered mental status [23] |
2 | On Admission | 83-year old, Female | Fever, slurring of speech, facial droop, and reduced oral intake [23] |
3 | On Admission | 80-year old female | Left sided weakness, altered mental status, one week history of frequent falls [23] |
4 | On Admission | 88-year old, Female | An 15 minute episode of weakness and numbness of right arm and word finding difficulty [23] |
5 | On Admission | 58-year old, Male | Dense Right-sided weakness and acute onset aphasia [24] |
Table 2. Reported cases of patients with COVID-19 infection and symptoms suggestive of stroke. |
Physical Examination
- The physical examination findings in stroke associated to COVID-19 will highly depend on the site of infarction, the blood vessels involved, and the presence of other risk factors.[20][21][22]
- The use of stroke scales helps to measure the degree of neurological impairment, ease communication, may help select patients candidates for fibrinolytic or mechanical therapy, permits the evaluation of changing clinical status, and identifies those patients at higher risk for complications (eg. intracerebral hemorrhage).[25]
- The National Institutes of Health Stroke Scale (NIHSS) (Table 3) is a tool used to measure the neurologic impairment caused by a stroke in a quantitative manner.[26][27] The NIHSS is composed of 11 items, each of which scores a specific ability between a 0 and 4. For each item, a score of 0 typically indicates normal function in that specific ability, while a higher score is indicative of some level of impairment. The individual scores from each item are summed in order to calculate a patient's total NIHSS score. The maximum possible score is 42, with the minimum score being a 0.[27]
Tested item | Title | Response and score |
---|---|---|
1A | Level of consciousness | 0—Alert |
1—Drowsy | ||
2—Obtunded | ||
3—Coma/unresponsive | ||
1B | Orientation questions (2) | 0—Answers both correctly |
1—Answers 1 correctly | ||
2—Answers neither correctly | ||
2 | Gaze | 0—Normal horizontal movements |
1—Partial gaze palsy | ||
2—Complete gaze palsy | ||
3 | Visual fields | 0—No visual field defect |
1—Partial hemianopia | ||
2—Complete hemianopia | ||
3—Bilateral hemianopia | ||
4 | Facial movement | 0—Normal |
1—Minor facial weakness | ||
2—Partial facial weakness | ||
3—Complete unilateral palsy | ||
5 | Motor function (arm)
a. Left b. Right |
0—No drift |
1—Drift before 10 s | ||
2—Falls before 10 s | ||
3—No effort against gravity | ||
4—No movement | ||
6 | Motor function (leg)
a. Left b. Right |
0—No drift |
1—Drift before 5 s | ||
2—Falls before 5 s | ||
3—No effort against gravity | ||
4—No movement | ||
7 | Limb ataxia | 0—No ataxia |
1—Ataxia in 1 limb | ||
2—Ataxia in 2 limbs | ||
8 | Sensory | 0—No sensory loss |
1—Mild sensory loss | ||
2—Severe sensory loss | ||
9 | Language | 0—Norma |
1—Mild aphasia | ||
2—Severe aphasia | ||
3—Mute or global aphasia | ||
10 | Articulation of words | 0—Norma |
1—Mild dysarthria | ||
2—Severe dysarthria | ||
11 | Extinction or inattention | 0—Absent |
1—Mild loss (1 sensory modality lost) | ||
2—Severe loss (2 modalities lost) | ||
Table 3. Adapted from Lyden et al., 1994[28] American Heart Association, Inc. |
- The pre-stroke Modified Rankin Score (mRS) (Table 4) is an estimated score used to assess the patient’s pre-stroke level of function. An estimated mRS should be abstracted from current medical record documentation about the patient’s ability to perform activities of daily living prior to the hospitalization for the acute ischemic stroke event.[29]
Area affected | Score | |
---|---|---|
Subganglionic Nuclei: | M1 - Frontal operculum | 1 |
M2 - Anterior temporal lobe | 1 | |
M3 - Posterior temporal lobe | 1 | |
Supraganglionic Nuclei: | M4 - Anterior MCA | 1 |
M5 - Lateral MCA | 1 | |
M6 - Posterior MCA | 1 | |
Basal Ganglia: | C - Caudate | 1 |
L - Lentiform Nucleus | 1 | |
I - Insula | 1 | |
IC - Internal Capsule | 1 | |
Table 4. Adapted from The University of Calgary ASPECT score in Accute stroke, 2020[30] |
- Alberta stroke program early CT score (ASPECTS) (Table 5) is a 10 point quantitative score used to asses early ischemic changes in patients suspected of having acute large vessel anterior circulation occlusion.[30]
Score | Item tested |
---|---|
0 | The patient had no residual symptoms. |
1 | The patient had no significant disability; able to carry out all activities. |
2 | The patient had slight disability; unable to carry out all activities but able to look after self without daily help. |
3 | The patient had moderate disability; requiring some external help but able to walk without the assistance of another individual. |
4 | The patient had moderately severe disability; unable to walk or attend to bodily functions without assistance of another individual. |
5 | The patient had severe disability; bedridden, incontinent, requires continuous care. |
6 | Unable to determine (UTD) from the medical record documentation. |
Table 5. Adapted from Specifications Manual for Joint Commission National Quality Measures, 2018[29] |
Laboratory Findings
- Patients with stroke associated to COVID-19 will have a positive test for COVID-19 confirmed either through molecular tests, nucleic acid amplification test, or serological testing.
- Serum glucose assessment is the only lab study that should proceed IV alteplase initiation, this should be over 50 mg/dL for its administration.[17]
- Coagulation studies and complete blood count should be delayed until after IV alteplase initiation unless there is suspicion for a coagulopathy disorder.[17]
- Troponin should be assessed in patients presenting with ischemic stroke.[17]
- In adults who are 20 years of age or older and not on lipid-lowering therapy, measurement of either a fasting or a nonfasting plasma lipid profile is effective in estimating atherosclerotic cardiovascular disease (ASCVD) risk and documenting baseline low-density lipoprotein cholesterol (LDL-C). 4 to 12 weeks after statin initiation or dose adjustment and every 3 to 12 months thereafter based on need to assess adherence or safety.[17]*
- In patients older than 75 years of age with clinical ASCVD, it is reasonable to initiate moderate or high-intensity statin therapy after evaluation of the potential for ASCVD risk reduction, adverse effects, and drug interactions.*
Ultrasound
- Echocardiography may be necessary in patients with ischemic stroke to identify and prevent secondary causes of stroke.
- Carotid ultrasound should be performed in all patients with ischemic stroke to assess for narrowing of carotids and decrease recurrence.
X-ray
- There is no evidence of usefulness of chest x-ray in the acute setting of stroke.[17]
CT scan
- Non-contrasted CT scan of the head should should always be performed before initiating IV alteplase.[17]
- Once hemorragic stroke is excluded, CT scan with contrast should be realized in patients with no history of renal disease without measuring creatinine concentration, taking into account that both COVID-19 infection and stroke increase the risk for renal impairment per se.[2][31]
- CT angiography of the brain may be needed in patients to make a decision for mechanical thrombectomy.[2][32][33]
- CT angiography's contrast can increase the risk of acute kidney injury in patients with COVID-19 infection.[2]
- CT perfusion should be done in patients who present within 24 hours of the initiation of symptoms.[2]
- Concurrent CT scan of the head and chest may be ordered at the same time in patients with COVID-19 infection.[2][34]
- CT angiography of the extracranial carotid and vertebral arteries, in addition to the intracranial circulation,is recommended in patients who are potential candidates for mechanical thrombectomy.[17][35]
MRI
- MRI of the head before IV alteplase administration to exclude microbleeds is not recommended.[17]
- Multimodal MRI of the head should be done in patients who present within 24 hours of the initiation of symptoms.[2]
- In patients who wake up with clinical symptoms of stroke of unknown onset (more than 3 hours?), an MRI with diffusion-positive FLAIR may be useful for selecting those who can benefit from IV alteplase administration.[17]
Electrocardiogram
- Baseline electrocardiographic assessment is recommended in patients presenting with ischemic stroke.[17]
Treatment
Medical therapy
- The reported cases of treatment for COVID-19-associated stroke have followed the same guidelines as patients with no COVID-19 infection. The following recommendations are mainly based on the current guidelines of management for stroke of the AHA 2019.
- IV alteplase is always preferred over mechanical thrombectomy when there are no contraindications.[36]
- The usefulness of anticoagulants such as thrombin inhibitors (dabigatran) and factor Xa inhibitors (rivaroxaban, apixaban, edoxaban) is not well established in the acute setting of stroke.[37]
- The use of thrombolysis via ultrasound waves concomitant to IV fibrinolysis is not recommended.[38]
- In patients who are 75 years of age or younger with clinical ASCVD, high-intensity statin therapy should be initiated or continued with the aim of achieving a 50% or greater reduction in LDL-C levels.*
- A clinician-patient risk discussion is recommended before initiation of statin therapy to review net clinical benefit, weighing the potential for ASCVD risk reduction against the potential for statin-associated side effects, statin-drug interactions, and safety, while emphasizing that side effects can be addressed successfully.*
- For patients with ischemic stroke who qualify for statin treatment, in-hospital initiation of statin therapy is reasonable.[39]*
- Among patients already taking statins at the time of onset of ischemic stroke, continuation of statin therapy during the acute period is reasonable.*
Alteplase
- IV alteplase is recommended for selected patients who can be treated within 3-4.5 hours of ischemic stroke symptom onset or patient last known well or at baseline state.[40][17][41]
- The dose of IV alteplase is 0.9 mg/kg (maximum dose 90 mg) over 60 min, with 10% of the dose given as a bolus over 1 min.[17]
- IV alteplase should be initiated as soon as possible, having been demonstrated better outcomes the sooner is administered.[17]
- Hyperglycemia should be treated during the first 24 hours after ischemic stroke, to achieve values of 140 to 180 mg/dL.[17]
- IV alteplase may cause bleeding and angioedema.[17]
- Glycoprotein IIb/IIIa inhibitors (tirofiban, apiximab, eptifibatide) should not be coadministered with IV alteplase.[17][42]
- IV alteplase may be used in patients under warfarin if the INR is lower than 1.7.[17]
- IV alteplase should not be administered to patients who have received a full dose of low-molecular-weight heparin within the previous 24 hours (including prophylactic doses).[17][43]
- Blood pressure should be sustained lower than 180/105 mmHg the first 24 hours after IV alteplase administration. Intensive lowering has been shown to be safe.[17][44]
- In case of intracranial bleeding due to alteplase administration, alteplase should be suspended, blood draws should be taken (CBC, coagulation studies), tranexamic acid should be administered (1000 mg IV infused over 10 min), and a subsecuent non-contratested CT scan of the head taken.[45]
- The use of IV alteplase should be used cautiously in patients who undergone a major surgery in the past 2 weeks.[17]
- IV alteplase for ischemic stroke is contraindicated in patients with a severe head trauma or subarachnoid hemorrage in the preceding 3 months.[17]
Tenecteplase
- Tenecteplase may be useful in patients with minor neurological impairment.[46]
- The dose of tenecteplase is a single IV bolus of 0.25-mg/kg (maximum 25 mg).[47]
Antiplatelet therapy
- Administration of aspirin is recommended in patients with AIS within 24 to 48 hours after onset. For those treated with IV alteplase, aspirin administration is generally delayed until 24 hours later.[48]
- The dose of aspirin is usually between 160-300mg daily.[49]
- IV aspirin administration within 90 minutes after the start of IV alteplase is associated with symptomatic intracranial hemorrhage, for which co administration is discouraged but benefits should be assessed in each individual case.[17][50]
- Dual antiplatelet therapy with aspirin and clopidogrel (75 mg/d, with a loading dose of 600mg) may be started within 24 hours after symptom onset and continued for 21 days in patients with no cardioembolic ischemic stroke.[51]
- Aspirin should not substitute IV alteplase or mechanical thrombectomy in patients eligible for these therapies.
Surgery
- The usefulness of emergency carotid endarterectomy, carotid angioplasty and stenting in the absence of an intracranial clot is not well established.[17]
Mechanical thrombectomy with a stent retriever
- Mechanical thrombectomy with stent retrievers is recommended over intra arterial fibrinolysis as first-line therapy.[17]
- Mechanical thrombectomy may be useful in selected patients with up to 24 hours of initiation of stroke.[17][52]
- In patients who undergo mechanical thrombectomy,blood pressure should be maintained below 180/105 mmHg during and for 24 hours after the procedure.[17]
- Patients should receive mechanical thrombectomy with a stent retriever if they meet all the following criteria:[53]
- Prestroke mRS score of 0 to 1
- Causative occlusion of the internal carotid artery or MCA segment 1 (M1)
- Age ≥18 years
- NIHSS score of ≥6
- ASPECTS of ≥6; and
- Treatment can be initiated within 6 hours of symptom onset
Aspiration thrombectomy
- Aspiration thrombectomy has not been shown to be inferior to stent retriever.[54]
- Direct aspiration thrombectomy as first-pass mechanical thrombectomy is recommended as noninferior to stent retriever for patients who meet all the following criteria:[54]
Intra arterial fibrinolysis
- Intra-arterial fibrinolysis may be initiated within 6 hours of stroke onset in selected patients in whom IV alteplase is contraindicated.
Other aspects of management
- Volume expansors are not recommended in ischemic stroke.[17][55]
- The best head positioning after stroke is not well established.[17][56]
- Supplemental oxygen and mechanical ventilation support should be provided when necessary to maintain oxygen saturation higher than 93%.[17][57]
- Sources of hyperthermia (>38°C) should be identified and treated with antipyretics in patients with stroke.[17][58]
- Hypoglycemia (<60 mg/dL) should be treated in the acute setting in patients with ischemic stroke.[17]
- Blood pressure ≥220/120 in patients who did not receive TPA should be treated within the first 48 to 72 hours after the onset of ischemic stroke.[59]
- Enteral feeding should be started within 7 days of admission after an acute stroke when there is no contraindications.[60]
- Psychological screening is always recommended to exclude poststroke depression.[61]
- Early rehabilitation in patients with stroke is adviced.[17]
Primary Prevention
- Smoking cessation should be highly encouraged in patients who suffered from stroke, behavioral interventions and nicotine replacement may be necessary.
Secondary Prevention
- There are no established measures for the secondary prevention of COVID-19 associated stroke.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Mao, Ling; Jin, Huijuan; Wang, Mengdie; Hu, Yu; Chen, Shengcai; He, Quanwei; Chang, Jiang; Hong, Candong; Zhou, Yifan; Wang, David; Miao, Xiaoping; Li, Yanan; Hu, Bo (2020). "Neurologic Manifestations of Hospitalized Patients With Coronavirus Disease 2019 in Wuhan, China". JAMA Neurology. 77 (6): 683. doi:10.1001/jamaneurol.2020.1127. ISSN 2168-6149.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Qureshi, Adnan I; Abd-Allah, Foad; Al-Senani, Fahmi; Aytac, Emrah; Borhani-Haghighi, Afshin; Ciccone, Alfonso; Gomez, Camilo R; Gurkas, Erdem; Hsu, Chung Y; Jani, Vishal; Jiao, Liqun; Kobayashi, Adam; Lee, Jun; Liaqat, Jahanzeb; Mazighi, Mikael; Parthasarathy, Rajsrinivas; Steiner, Thorsten; Suri, M Fareed K; Toyoda, Kazunori; Ribo, Marc; Gongora-Rivera, Fernando; Oliveira-Filho, Jamary; Uzun, Guven; Wang, Yongjun (2020). "Management of acute ischemic stroke in patients with COVID-19 infection: Report of an international panel". International Journal of Stroke. 15 (5): 540–554. doi:10.1177/1747493020923234. ISSN 1747-4930.
- ↑ Saavedra, Juan M. (2005). "Brain Angiotensin II: New Developments, Unanswered Questions and Therapeutic Opportunities". Cellular and Molecular Neurobiology. 25 (3–4): 485–512. doi:10.1007/s10571-005-4011-5. ISSN 0272-4340.
- ↑ Sharifi-Razavi, A.; Karimi, N.; Rouhani, N. (2020). "COVID-19 and intracerebral haemorrhage: causative or coincidental?". New Microbes and New Infections. 35: 100669. doi:10.1016/j.nmni.2020.100669. ISSN 2052-2975.
- ↑ Hess, David C.; Eldahshan, Wael; Rutkowski, Elizabeth (2020). "COVID-19-Related Stroke". Translational Stroke Research. 11 (3): 322–325. doi:10.1007/s12975-020-00818-9. ISSN 1868-4483.
- ↑ Arbour, Nathalie; Day, Robert; Newcombe, Jia; Talbot, Pierre J. (2000). "Neuroinvasion by Human Respiratory Coronaviruses". Journal of Virology. 74 (19): 8913–8921. doi:10.1128/JVI.74.19.8913-8921.2000. ISSN 1098-5514.
- ↑ Yu, Fei; Du, Lanying; Ojcius, David M.; Pan, Chungen; Jiang, Shibo (2020). "Measures for diagnosing and treating infections by a novel coronavirus responsible for a pneumonia outbreak originating in Wuhan, China". Microbes and Infection. 22 (2): 74–79. doi:10.1016/j.micinf.2020.01.003. ISSN 1286-4579.
- ↑ Li, Yan‐Chao; Bai, Wan‐Zhu; Hashikawa, Tsutomu (2020). "The neuroinvasive potential of SARS‐CoV2 may play a role in the respiratory failure of COVID‐19 patients". Journal of Medical Virology. 92 (6): 552–555. doi:10.1002/jmv.25728. ISSN 0146-6615.
- ↑ 9.0 9.1 Paniz‐Mondolfi, Alberto; Bryce, Clare; Grimes, Zachary; Gordon, Ronald E.; Reidy, Jason; Lednicky, John; Sordillo, Emilia Mia; Fowkes, Mary (2020). "Central nervous system involvement by severe acute respiratory syndrome coronavirus‐2 (SARS‐CoV‐2)". Journal of Medical Virology. 92 (7): 699–702. doi:10.1002/jmv.25915. ISSN 0146-6615.
- ↑ Moriguchi, Takeshi; Harii, Norikazu; Goto, Junko; Harada, Daiki; Sugawara, Hisanori; Takamino, Junichi; Ueno, Masateru; Sakata, Hiroki; Kondo, Kengo; Myose, Natsuhiko; Nakao, Atsuhito; Takeda, Masayuki; Haro, Hirotaka; Inoue, Osamu; Suzuki-Inoue, Katsue; Kubokawa, Kayo; Ogihara, Shinji; Sasaki, Tomoyuki; Kinouchi, Hiroyuki; Kojin, Hiroyuki; Ito, Masami; Onishi, Hiroshi; Shimizu, Tatsuya; Sasaki, Yu; Enomoto, Nobuyuki; Ishihara, Hiroshi; Furuya, Shiomi; Yamamoto, Tomoko; Shimada, Shinji (2020). "A first case of meningitis/encephalitis associated with SARS-Coronavirus-2". International Journal of Infectious Diseases. 94: 55–58. doi:10.1016/j.ijid.2020.03.062. ISSN 1201-9712.
- ↑ Baig, Abdul Mannan; Khaleeq, Areeba; Ali, Usman; Syeda, Hira (2020). "Evidence of the COVID-19 Virus Targeting the CNS: Tissue Distribution, Host–Virus Interaction, and Proposed Neurotropic Mechanisms". ACS Chemical Neuroscience. 11 (7): 995–998. doi:10.1021/acschemneuro.0c00122. ISSN 1948-7193.
- ↑ 12.0 12.1 12.2 Yaghi, Shadi; Ishida, Koto; Torres, Jose; Mac Grory, Brian; Raz, Eytan; Humbert, Kelley; Henninger, Nils; Trivedi, Tushar; Lillemoe, Kaitlyn; Alam, Shazia; Sanger, Matthew; Kim, Sun; Scher, Erica; Dehkharghani, Seena; Wachs, Michael; Tanweer, Omar; Volpicelli, Frank; Bosworth, Brian; Lord, Aaron; Frontera, Jennifer (2020). "SARS-CoV-2 and Stroke in a New York Healthcare System". Stroke. 51 (7): 2002–2011. doi:10.1161/STROKEAHA.120.030335. ISSN 0039-2499.
- ↑ Merkler, Alexander E.; Parikh, Neal S.; Mir, Saad; Gupta, Ajay; Kamel, Hooman; Lin, Eaton; Lantos, Joshua; Schenck, Edward J.; Goyal, Parag; Bruce, Samuel S.; Kahan, Joshua; Lansdale, Kelsey N.; LeMoss, Natalie M.; Murthy, Santosh B.; Stieg, Philip E.; Fink, Matthew E.; Iadecola, Costantino; Segal, Alan Z.; Cusick, Marika; Campion, Thomas R.; Diaz, Ivan; Zhang, Cenai; Navi, Babak B. (2020). "Risk of Ischemic Stroke in Patients With Coronavirus Disease 2019 (COVID-19) vs Patients With Influenza". JAMA Neurology. doi:10.1001/jamaneurol.2020.2730. ISSN 2168-6149.
- ↑ 14.0 14.1 14.2 Qin, Chuan; Zhou, Luoqi; Hu, Ziwei; Yang, Sheng; Zhang, Shuoqi; Chen, Man; Yu, Haihan; Tian, Dai-Shi; Wang, Wei (2020). "Clinical Characteristics and Outcomes of COVID-19 Patients With a History of Stroke in Wuhan, China". Stroke. 51 (7): 2219–2223. doi:10.1161/STROKEAHA.120.030365. ISSN 0039-2499.
- ↑ Oxley, Thomas J.; Mocco, J.; Majidi, Shahram; Kellner, Christopher P.; Shoirah, Hazem; Singh, I. Paul; De Leacy, Reade A.; Shigematsu, Tomoyoshi; Ladner, Travis R.; Yaeger, Kurt A.; Skliut, Maryna; Weinberger, Jesse; Dangayach, Neha S.; Bederson, Joshua B.; Tuhrim, Stanley; Fifi, Johanna T. (2020). "Large-Vessel Stroke as a Presenting Feature of Covid-19 in the Young". New England Journal of Medicine. 382 (20): e60. doi:10.1056/NEJMc2009787. ISSN 0028-4793.
- ↑ 16.0 16.1 Tsivgoulis, Georgios; Katsanos, Aristeidis H.; Ornello, Raffaele; Sacco, Simona (2020). "Ischemic Stroke Epidemiology During the COVID-19 Pandemic". Stroke. 51 (7): 1924–1926. doi:10.1161/STROKEAHA.120.030791. ISSN 0039-2499.
- ↑ 17.00 17.01 17.02 17.03 17.04 17.05 17.06 17.07 17.08 17.09 17.10 17.11 17.12 17.13 17.14 17.15 17.16 17.17 17.18 17.19 17.20 17.21 17.22 17.23 17.24 17.25 17.26 17.27 17.28 17.29 17.30 17.31 17.32 Powers, William J.; Rabinstein, Alejandro A.; Ackerson, Teri; Adeoye, Opeolu M.; Bambakidis, Nicholas C.; Becker, Kyra; Biller, José; Brown, Michael; Demaerschalk, Bart M.; Hoh, Brian; Jauch, Edward C.; Kidwell, Chelsea S.; Leslie-Mazwi, Thabele M.; Ovbiagele, Bruce; Scott, Phillip A.; Sheth, Kevin N.; Southerland, Andrew M.; Summers, Deborah V.; Tirschwell, David L. (2019). "Guidelines for the Early Management of Patients With Acute Ischemic Stroke: 2019 Update to the 2018 Guidelines for the Early Management of Acute Ischemic Stroke: A Guideline for Healthcare Professionals From the American Heart Association/American Stroke Association". Stroke. 50 (12). doi:10.1161/STR.0000000000000211. ISSN 0039-2499.
- ↑ Yew KS, Cheng EM (April 2015). "Diagnosis of acute stroke". Am Fam Physician. 91 (8): 528–36. PMID 25884860.
- ↑ Bouchez, Laurie; Sztajzel, Roman; Vargas, Maria Isabel; Machi, Paolo; Kulcsar, Zsolt; Poletti, Pierre-Alexandre; Pereira, Vitor Mendes; Lövblad, Karl-Olof (2017). "CT imaging selection in acute stroke". European Journal of Radiology. 96: 153–161. doi:10.1016/j.ejrad.2016.10.026. ISSN 0720-048X.
- ↑ 20.0 20.1 Hernández-Pérez M, Pérez de la Ossa N, Aleu A, Millán M, Gomis M, Dorado L; et al. (2014). "Natural history of acute stroke due to occlusion of the middle cerebral artery and intracranial internal carotid artery". J Neuroimaging. 24 (4): 354–8. doi:10.1111/jon.12062. PMID 24251821.
- ↑ 21.0 21.1 Lima FO, Furie KL, Silva GS, Lev MH, Camargo EC, Singhal AB; et al. (2014). "Prognosis of untreated strokes due to anterior circulation proximal intracranial arterial occlusions detected by use of computed tomography angiography". JAMA Neurol. 71 (2): 151–7. doi:10.1001/jamaneurol.2013.5007. PMID 24323077.
- ↑ 22.0 22.1 Moulin DE, Lo R, Chiang J, Barnett HJ (1985). "Prognosis in middle cerebral artery occlusion". Stroke. 16 (2): 282–4. PMID 3975967.
- ↑ 23.0 23.1 23.2 23.3 23.4 Avula, Akshay; Nalleballe, Krishna; Narula, Naureen; Sapozhnikov, Steven; Dandu, Vasuki; Toom, Sudhamshi; Glaser, Allison; Elsayegh, Dany (2020). "COVID-19 presenting as stroke". Brain, Behavior, and Immunity. 87: 115–119. doi:10.1016/j.bbi.2020.04.077. ISSN 0889-1591.
- ↑ 24.0 24.1 Zandi, Michael S; Manji, Hadi; Jäger, Hans Rolf; Hoskote, Chandrashekar; Werring, David J; Vincent, Angela; Howard, Robin; Spillane, Jennifer; Lunn, Michael P; Thom, Maria; Houlihan, Catherine; Carletti, Francesco; Farmer, Simon F; Longley, Nicky; Checkley, Anna; Simister, Robert; Perry, Richard J; Chandratheva, Arvind; Schott, Jonathan M; Silber, Eli; Sreedharan, Jemeen; Attwell, David; Yoong, Michael; Davies, Nicholas W S; Carswell, Christopher; Everitt, Alex D; Miller, Thomas D; Hotton, Gary; Foulkes, Alexander J M; Trip, S Anand; Yong, Wisdom; Keddie, Stephen; Levee, Viva; Mehta, Puja R; Lim, Soon Tjin; McLoughlin, Benjamin; McNamara, Patricia; Morrow, Jasper; Christofi, Gerry; Price, Gary; Tuzlali, Hatice; Boyd, Elena; Chinthapalli, Krishna; Geraldes, Ruth; Khoo, Anthony; Vivekanandam, Vinojini; Zambreanu, Laura; Raftopoulos, Rhian E; Kumar, Guru; Jayaseelan, Dipa L; Bharucha, Tehmina; Wiethoff, Sarah; Nortley, Ross; Benjamin, Laura; Brown, Rachel L; Paterson, Ross W (2020). "The emerging spectrum of COVID-19 neurology: clinical, radiological and laboratory findings". Brain. doi:10.1093/brain/awaa240. ISSN 0006-8950.
- ↑ Adams, H. P.; Davis, P. H.; Leira, E. C.; Chang, K.-C.; Bendixen, B. H.; Clarke, W. R.; Woolson, R. F.; Hansen, M. D. (1999). "Baseline NIH Stroke Scale score strongly predicts outcome after stroke: A report of the Trial of Org 10172 in Acute Stroke Treatment (TOAST)". Neurology. 53 (1): 126–126. doi:10.1212/WNL.53.1.126. ISSN 0028-3878.
- ↑ "www.ninds.nih.gov" (PDF).
- ↑ 27.0 27.1 "National Institutes of Health Stroke Scale - Wikipedia".
- ↑ Lyden, P; Brott, T; Tilley, B; Welch, K M; Mascha, E J; Levine, S; Haley, E C; Grotta, J; Marler, J (1994). "Improved reliability of the NIH Stroke Scale using video training. NINDS TPA Stroke Study Group". Stroke. 25 (11): 2220–2226. doi:10.1161/01.STR.25.11.2220. ISSN 0039-2499.
- ↑ 29.0 29.1 "Pre-Stroke Modified Rankin Score (mRS) (v2018B)".
- ↑ 30.0 30.1 "Home".
- ↑ Cheng, Yichun; Luo, Ran; Wang, Kun; Zhang, Meng; Wang, Zhixiang; Dong, Lei; Li, Junhua; Yao, Ying; Ge, Shuwang; Xu, Gang (2020). "Kidney disease is associated with in-hospital death of patients with COVID-19". Kidney International. 97 (5): 829–838. doi:10.1016/j.kint.2020.03.005. ISSN 0085-2538.
- ↑ Lövblad KO, Altrichter S, Viallon M, Sztajzel R, Delavelle J, Vargas MI, El-Koussy M, Federspiel A, Sekoranja L (October 2008). "Neuro-imaging of cerebral ischemic stroke". J Neuroradiol. 35 (4): 197–209. doi:10.1016/j.neurad.2008.01.002. PMID 18329713.
- ↑ Smith, Eric E.; Kent, David M.; Bulsara, Ketan R.; Leung, Lester Y.; Lichtman, Judith H.; Reeves, Mathew J.; Towfighi, Amytis; Whiteley, William N.; Zahuranec, Darin B. (2018). "Accuracy of Prediction Instruments for Diagnosing Large Vessel Occlusion in Individuals With Suspected Stroke: A Systematic Review for the 2018 Guidelines for the Early Management of Patients With Acute Ischemic Stroke". Stroke. 49 (3). doi:10.1161/STR.0000000000000160. ISSN 0039-2499.
- ↑ Guan WJ, Ni ZY, Hu Y, Liang WH, Ou CQ, He JX, Liu L, Shan H, Lei CL, Hui D, Du B, Li LJ, Zeng G, Yuen KY, Chen RC, Tang CL, Wang T, Chen PY, Xiang J, Li SY, Wang JL, Liang ZJ, Peng YX, Wei L, Liu Y, Hu YH, Peng P, Wang JM, Liu JY, Chen Z, Li G, Zheng ZJ, Qiu SQ, Luo J, Ye CJ, Zhu SY, Zhong NS (April 2020). "Clinical Characteristics of Coronavirus Disease 2019 in China". N. Engl. J. Med. 382 (18): 1708–1720. doi:10.1056/NEJMoa2002032. PMC 7092819 Check
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value (help). PMID 32109013 Check|pmid=
value (help). Vancouver style error: initials (help) - ↑ Aulicky, P.; Mikulik, R.; Goldemund, D.; Reif, M.; Dufek, M.; Kubelka, T. (2009). "Safety of performing CT angiography in stroke patients treated with intravenous thrombolysis". Journal of Neurology, Neurosurgery & Psychiatry. 81 (7): 783–787. doi:10.1136/jnnp.2009.184002. ISSN 0022-3050.
- ↑ Saver, Jeffrey L.; Goyal, Mayank; van der Lugt, Aad; Menon, Bijoy K.; Majoie, Charles B. L. M.; Dippel, Diederik W.; Campbell, Bruce C.; Nogueira, Raul G.; Demchuk, Andrew M.; Tomasello, Alejandro; Cardona, Pere; Devlin, Thomas G.; Frei, Donald F.; du Mesnil de Rochemont, Richard; Berkhemer, Olvert A.; Jovin, Tudor G.; Siddiqui, Adnan H.; van Zwam, Wim H.; Davis, Stephen M.; Castaño, Carlos; Sapkota, Biggya L.; Fransen, Puck S.; Molina, Carlos; van Oostenbrugge, Robert J.; Chamorro, Ángel; Lingsma, Hester; Silver, Frank L.; Donnan, Geoffrey A.; Shuaib, Ashfaq; Brown, Scott; Stouch, Bruce; Mitchell, Peter J.; Davalos, Antoni; Roos, Yvo B. W. E. M.; Hill, Michael D. (2016). "Time to Treatment With Endovascular Thrombectomy and Outcomes From Ischemic Stroke: A Meta-analysis". JAMA. 316 (12): 1279. doi:10.1001/jama.2016.13647. ISSN 0098-7484.
- ↑ Gioia, Laura C.; Kate, Mahesh; Sivakumar, Leka; Hussain, Dulara; Kalashyan, Hayrapet; Buck, Brian; Bussiere, Miguel; Jeerakathil, Thomas; Shuaib, Ashfaq; Emery, Derek; Butcher, Ken (2016). "Early Rivaroxaban Use After Cardioembolic Stroke May Not Result in Hemorrhagic Transformation". Stroke. 47 (7): 1917–1919. doi:10.1161/STROKEAHA.116.013491. ISSN 0039-2499.
- ↑ Nacu, Aliona; Kvistad, Christopher E.; Naess, Halvor; Øygarden, Halvor; Logallo, Nicola; Assmus, Jörg; Waje-Andreassen, Ulrike; Kurz, Kathinka D.; Neckelmann, Gesche; Thomassen, Lars (2017). "NOR-SASS (Norwegian Sonothrombolysis in Acute Stroke Study)". Stroke. 48 (2): 335–341. doi:10.1161/STROKEAHA.116.014644. ISSN 0039-2499.
- ↑ Sanossian, Nerses; Saver, Jeffrey L.; Liebeskind, David S.; Kim, Doojin; Razinia, Tannaz; Ovbiagele, Bruce (2006). "Achieving Target Cholesterol Goals After Stroke". Archives of Neurology. 63 (8): 1081. doi:10.1001/archneur.63.8.1081. ISSN 0003-9942.
- ↑ Lees, Kennedy R.; Emberson, Jonathan; Blackwell, Lisa; Bluhmki, Erich; Davis, Stephen M.; Donnan, Geoffrey A.; Grotta, James C.; Kaste, Markku; von Kummer, Rüdiger; Lansberg, Maarten G.; Lindley, Richard I.; Lyden, Patrick; Murray, Gordon D.; Sandercock, Peter A.G.; Toni, Danilo; Toyoda, Kazunori; Wardlaw, Joanna M.; Whiteley, William N.; Baigent, Colin; Hacke, Werner; Howard, George; Marler, John; Halls, Heather; Holland, Lisa; Mathews, Clare; Smith, Samantha; Wilson, Kate; Koga, Masatoshi; Albers, Gregory; Brott, Thomas; Cohen, Geoffrey; Koga, Masatoshi; Olivot, Jean Marc; Parsons, Mark; Tilley, Barbara; Wahlgren, Nils; del Zoppo, Gregory J (2016). "Effects of Alteplase for Acute Stroke on the Distribution of Functional Outcomes". Stroke. 47 (9): 2373–2379. doi:10.1161/STROKEAHA.116.013644. ISSN 0039-2499.
- ↑ "The benefits and harms of intravenous thrombolysis with recombinant tissue plasminogen activator within 6 h of acute ischaemic stroke (the third international stroke trial [IST-3]): a randomised controlled trial". The Lancet. 379 (9834): 2352–2363. 2012. doi:10.1016/S0140-6736(12)60768-5. ISSN 0140-6736.
- ↑ Adeoye, Opeolu; Sucharew, Heidi; Khoury, Jane; Tomsick, Thomas; Khatri, Pooja; Palesch, Yuko; Schmit, Pamela A.; Pancioli, Arthur M.; Broderick, Joseph P. (2015). "Recombinant Tissue-Type Plasminogen Activator Plus Eptifibatide Versus Recombinant Tissue-Type Plasminogen Activator Alone in Acute Ischemic Stroke". Stroke. 46 (2): 461–464. doi:10.1161/STROKEAHA.114.006743. ISSN 0039-2499.
- ↑ Powers, William J.; Derdeyn, Colin P.; Biller, José; Coffey, Christopher S.; Hoh, Brian L.; Jauch, Edward C.; Johnston, Karen C.; Johnston, S. Claiborne; Khalessi, Alexander A.; Kidwell, Chelsea S.; Meschia, James F.; Ovbiagele, Bruce; Yavagal, Dileep R. (2015). "2015 American Heart Association/American Stroke Association Focused Update of the 2013 Guidelines for the Early Management of Patients With Acute Ischemic Stroke Regarding Endovascular Treatment". Stroke. 46 (10): 3020–3035. doi:10.1161/STR.0000000000000074. ISSN 0039-2499.
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