| Cardiovascular
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Acute coronary syndrome, acute myocardial infarction, acute myocarditis, Adams-Stokes syndrome, anomalous origins of coronary arteries, aortic aneurysm, aortic dissection, aortic stenosis, arrhythmogenic right ventricular dysplasia, atrial myxoma, atrioventricular block, AV nodal reentrant tachycardia, bifascicular block, bradyarrhythmia, brugada syndrome, cardiac tamponade, catecholaminergic polymorphic ventricular tachycardia, channelopathy, complete atrioventricular block, dehydration, dilated cardiomyopathy, epsilon wave, hemorrhage, hypertrophic cardiomyopathy, hypotension, Jervell and Lange-Nielsen syndrome, long QT syndrome, mitral stenosis, orthostatic hypotension, paroxysmal ventricular tachycardia, persistent atrial flutter, preexcitation syndrome, prolonged corrected QT interval, pulmonic stenosis, retroperitoneal hemorrhage, ruptured abdominal aortic aneurysm, saddle embolus, second degree AV block, short corrected QT interval, short QT syndrome, sick sinus syndrome, significant sinus pause, subclavian steal syndrome, supraventricular tachyarrhythmias, third degree heart block, ventricular arrhythmia, ventricular tachycardia, Wolff-Parkinson-White syndrome
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| Chemical/Poisoning
|
Carbon monoxide, cocaine, ethanol
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| Dental
|
No underlying causes
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| Dermatologic
|
No underlying causes
|
| Drug Side Effect
|
ACE inhibitor, alpha blockers, amitriptyline, antiarrhythmics, antidepressants, antiemetics, antihypertensive medications, antipsychotic agents, barbiturates, beta blockers, bromocriptine, calcium channel blocker, chlorpheniramine, cinnarizine, clonidine, desipramine, digoxin, diphenhydramine, diuretics, dothiepin, erectile dysfunction medications, ganglionic blockers, hydralazine, hydroxyzine, L-dopa, nitrates, nortriptyline, opiates, phenothiazines, tricyclic antidepressants, vasodilators
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| Ear Nose Throat
|
No underlying causes
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| Endocrine
|
No underlying causes
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| Environmental
|
No underlying causes
|
| Gastroenterologic
|
Gastrointestinal bleeding
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| Genetic
|
Channelopathy
|
| Hematologic
|
No underlying causes
|
| Iatrogenic
|
No underlying causes
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| Infectious Disease
|
No underlying causes
|
| Musculoskeletal/Orthopedic
|
No underlying causes
|
| Neurologic
|
Carotid sinus hypersensitivity, dysautonomia, Lewy body dementia, multiple system atrophy, parkinson disease, seizure, spincal cord injury, subarachnoid hemorrhage, transient ischemic attack, vagal stimulation, vertebrobasilar artery insufficiency
|
| Nutritional/Metabolic
|
No underlying causes
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| Obstetric/Gynecologic
|
No underlying causes
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| Oncologic
|
Atrial myxoma, carcinoid syndrome
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| Ophthalmologic
|
No underlying causes
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| Overdose/Toxicity
|
No underlying causes
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| Psychiatric
|
Anorexia nervosa, anxiety, emotional distress, hysterical faint, psychogenic pseudosyncope
|
| Pulmonary
|
Hypoxia
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| Renal/Electrolyte
|
Uremia
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| Rheumatology/Immunology/Allergy
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Anaphylaxis, Takayasu's arteritis
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| Sexual
|
No underlying causes
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| Trauma
|
No underlying causes
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| Urologic
|
No underlying causes
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| Miscellaneous
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Breath holding spell, choking game, cough, defecation, deglutition, drop attack, hair combing, heat illness, hyperventilation, hypocapnia, hypoglycemia, implanted device malfunction, laughing, micturition, post-exercise, postprandial hypotension, prolonged bed rest, sneeze, significant blood loss, valsalva maneuver, vomiting, weightlifting
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