Myocardial ischemia/infarction |
Noninfarction, transmural ischemia (eg vasospastic angina and takotsubo cardiomyopathy) |
Acute MI especially due to acute epicardial coronary occlusion; may be due to takotsubo cardiomyopathy and other nonatherosclerotic coronary occlusion or severe hypoperfusion syndromes |
Post-MI (ventricular aneurysm pattern) |
Acute pericarditis |
Abnormal early repolarization syndromes |
Normal variants (including benign early repolarization) |
Left ventricular hypertrophy or left bundle branch block (V1 to V2 or V3) |
Other |
Myocarditis (including COVID-19 infections) |
Massive pulmonary embolism (leads V1 to V2 in occasional cases) |
Brugada-type patterns (V1 to V3 with right bundle branch block-appearing morphology) |
Myocardial tumor |
Myocardial trauma |
Hyperkalemia (only leads V1 and V2) |
Hypothermia (J wave/Osborn wave) |
Hypercalcemia (rarely) |
Post-DC cardioversion (rarely) |
Neurogenic stress cardiomyopathy |
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