Cardiovascular syncope |
Arrhythmia |
Ventricular tachycardia |
Long QT syndrome |
Brugada syndrome |
Bradycardia: Mobitz type II or 3rd degree heart block |
Significant sinus pause >3 seconds |
Ischemia |
Acute coronary syndrome, myocardial infarction |
Structural Abnormalities |
Valvular heart disease: aortic stenosis, mitral stenosis |
Cardiomyopathy (ischemic, dilated, hypertrophic) |
Atrial myxoma |
Cardiac tamponade |
Aortic dissection |
Significant hemorrhage |
Trauma with significant blood loss |
Gastrointestinal bleeding |
Tissue rupture: aortic aneurysm, spleen, ovarian cyst, ectopic pregnancy, retroperitoneal hemorrhage |
Pulmonary embolism |
Saddle embolus resulting in outflow tract obstruction or severe hypoxia |
Subarachnoid hemorrhage |
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