ST-segment elevation: Distinguishing ST elevation myocardial infarction from ST elevation secondary to nonischemic etiologies

Table 1 Common patterns of nonischemic ST elevation

ST elevation secondary to LVH

ST elevation secondary to conduction defect (such as left bundle branch block and non-specific intracardiac conduction delay)

Early repolarization pattern (notched J-point typically in anterolateral leads)

Normal variant of ST elevation (ST elevation mostly in leads V2-V3)

Concave ST elevation

Spontaneously reperfused STEMI

Aneurysm/old myocardial infarction

Pericarditis/myocarditis

Wolf-Parkinson-White syndrome (pre-excitation)

Brugada pattern

Takotsubo (apical ballooning) syndrome

Hyperkalemia

Hypercalcemia

LVH: Left ventricular hypertrophy; STEMI: ST elevation myocardial infarctions.