Unstable angina/ NSTEMI resident survival guide: Difference between revisions

< Unstable angina

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Revision as of 19:55, 27 January 2014

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Definition

Unstable angina is an unexpected chest pain while resting or sleeping,that could get worse with time lasting at least 20 minutes up to 30 minutes. It is caused by a temporary reduced blood flow, resulting in a decreased oxygen supply to the myocardial tissue.

Causes

Life Threatening Causes

Reduced myocardial perfussion
Mycordial infarction
Cocaine-associated mycoardial infarction

Common Causes

Atherosclerosis
Non-occlusive thrombus

Management

Diagnosis

CHARACTERIZE THE SYMPTOMS ❑ Chest pain or discomfort while resting ❑ The pain is longer than 20 minutes ❑ It started without physical exertion ❑ Rest doesn´t help to relieve it ❑ Gets worse with time



PERSONAL HISTORY ❑ Age ❑ Previous MI ❑ Previous PCI or CABG



PHYSICAL EXAMINATION ❑ Measure blood pressure ❑ Measure heart rate ❑ Auscultation of murmurs ❑ CHF



LABS & TESTS ❑ EKG ❑ Troponin I and T ❑ CK-MB ❑ Creatinine ❑ Glucose ❑ Hemoglobin

Treatment

❑ Administer 300mg Aspirin immediately after hospital admission

❑ Administer oxygen in patients with saturation <90%
❑ Administer nitroglycerine sub-lingual ADD DOSES
❑ Administer morphine IV initial dose 2-4mg with increments of 2-8mg every 5 to 15 minutes
❑ Administer beta-blockers to all patients without contraindications
❑ Administer statins, atorvastatine 80mg

❑ Initiate anti thrombotic therapy

Determine Risk of adverse coronary event (TIMI)

LOW RISK
Initial conservative strategy

HIGH RISK
Initial invasive strategy

❑ Administer 300mg of copidogrel
❑ Administer fondoparinaux or UFH in case of renal failure

❑ Administer IV GP IIb/IIIa inhibitors (eptifibatide or tirofiban)
OR
❑ Administer Bivalirudin

Perform a Stress test

Angiography

LOW RISK

HIGH RISK

NEGATIVE

POSITIVE

Recurrent symptoms?

❑ Continue Aspirin
❑ Continue with clopidrogel or ticagelor for 12 months
❑ Discontinue with GP inhibitors
❑ UFH (for 48hrs) or Enoxiparin (for 8 dyas)

NO

❑ heart faillure
❑ serious arrhythmias
❑ subsequent isquemia

Continue Aspirin
❑ Continue with clopidrogel or ticagelor for 12 months
❑ Discontinue with GP inhibitors
❑ UFH (for 48hrs) or Enoxiparin (for 8 dyas

PCI

❑ Administer clopidogrel 24 hrs before
❑ As as possible in no bleeding risk patients who are unstable or with high risk of isquemia

❑ Administer UFH (50-100 units/kg)

CABG

❑ Continue aspirin + UFH
❑ Discontinue clopidogel 5 days before
❑ Discontinue enoxiparin and fondoparinaux 12-24 hrs before
❑ Discontinue IV GP inhibitors 4 hrs bfore

❑ Discontinue bivalirudin 3 hrs before

INTENSIVE STRATEGY - ANGIOGRAPHY

NEGATIVE

POSITIVE

❑ Continue Aspirin
❑ Continue with clopidrogel or ticagelor for 12 months
❑ Discontinue with GP inhibitors
❑ UFH (for 48hrs) or Enoxiparin (for 8 dyas)

PCI

❑ Administer clopidogrel 24 hrs before
❑ As as possible in no bleeding risk patients who are unstable or with high risk of isquemia

❑ Administer UFH (50-100 units/kg)

CABG

❑ Continue aspirin + UFH
❑ Discontinue clopidogel 5 days before
❑ Discontinue enoxiparin and fondoparinaux 12-24 hrs before
❑ Discontinue IV GP inhibitors 4 hrs bfore

❑ Discontinue bivalirudin 3 hrs before

Do´s

Administer 300 mg of clopidogrel as initial treatment instead of aspirin in case of gastrointestinal intolerance of hypersensitivity reaction.
Oxygen must be administered in patients with arteria saturation less than 90% or in respiratory distress ^[1]
Administer sublingual nitroglycerin in patients with ischemic chest pain. IV should be administer in patients with persistent chest pain after three sublingual nitroglycerins. ^[2]
Nitroglycerin should be administer to all patients with hypertension or heart failure.
Beta-bloquers should be administer to all patients with hypertension, tachycardia or ongoing chest pain. ^[3] ^[4]
Statins should be administer to all patients with unstable angina. The recommendation is atorvastatin 80mg/day ^[5] ^[6]
Non-steroidal anti-inflamatory drugs should be discontinued immediately. ^[7]
P2Y12 platelet inhibitor therapy should be continued for 12 months with a maintenance dose of either
- Clopidogrel - 75mg per day
- Prasogrel 10mg per day
- Ticagrelor 90mg twice a day

Don´ts

References

↑ name="pmid23554440">{{cite journal| author=Shuvy M, Atar D, Gabriel Steg P, Halvorsen S, Jolly S, Yusuf S et al.| title=Oxygen therapy in acute coronary syndrome: are the benefits worth the risk? | journal=Eur Heart J | year= 2013 | volume= 34 | issue= 22 | pages= 1630-5 | pmid=23554440 | doi=10.1093/eurheartj/eht110 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?
↑ Kaplan K, Davison R, Parker M, Przybylek J, Teagarden JR, Lesch M (1983). "Intravenous nitroglycerin for the treatment of angina at rest unresponsive to standard nitrate therapy". Am J Cardiol. 51 (5): 694–8. PMID 6402912.
↑ Rosendorff C, Black HR, Cannon CP, Gersh BJ, Gore J, Izzo JL; et al. (2007). "Treatment of hypertension in the prevention and management of ischemic heart disease: a scientific statement from the American Heart Association Council for High Blood Pressure Research and the Councils on Clinical Cardiology and Epidemiology and Prevention". Circulation. 115 (21): 2761–88. doi:10.1161/CIRCULATIONAHA.107.183885. PMID 17502569.
↑ López-Sendón J, Swedberg K, McMurray J, Tamargo J, Maggioni AP, Dargie H; et al. (2004). "Expert consensus document on beta-adrenergic receptor blockers". Eur Heart J. 25 (15): 1341–62. doi:10.1016/j.ehj.2004.06.002. PMID 15288162.
↑ Cannon CP, Braunwald E, McCabe CH, Rader DJ, Rouleau JL, Belder R; et al. (2004). "Intensive versus moderate lipid lowering with statins after acute coronary syndromes". N Engl J Med. 350 (15): 1495–504. doi:10.1056/NEJMoa040583. PMID 15007110. Review in: ACP J Club. 2004 Sep-Oct;141(2):33
↑ Schwartz GG, Olsson AG, Ezekowitz MD, Ganz P, Oliver MF, Waters D; et al. (2001). "Effects of atorvastatin on early recurrent ischemic events in acute coronary syndromes: the MIRACL study: a randomized controlled trial". JAMA. 285 (13): 1711–8. PMID 11277825.
↑ Trelle S, Reichenbach S, Wandel S, Hildebrand P, Tschannen B, Villiger PM; et al. (2011). "Cardiovascular safety of non-steroidal anti-inflammatory drugs: network meta-analysis". BMJ. 342: c7086. doi:10.1136/bmj.c7086. PMC 3019238. PMID 21224324. Review in: Evid Based Med. 2011 Oct;16(5):142-3

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