Causes of tall (peaked) T waves on ECG

Ischemic causes

Hyperacute phase of myocardial infarction

Acute transient transmural ischemia (Prinzmetal's angina)

Chronic (evolving) phase of myocardial infarction (tall positive T waves reciprocal to primary deep T wave inversions)

Nonischemic causes

Normal variants ("early repolarization" patterns)

Hyperkalemia

Acute hemopericardium

Cerebrovascular hemorrhage (more commonly T wave inversions)

Left ventricular hypertrophy

Right precordial leads, usually in conjunction with left precordial ST depressions and T wave inversions

Left precordial leads, particularly in association with "diastolic" volume overload conditions

Left bundle branch block (right precordial leads)

Acute pericarditis (occasionally)

Causes_of_tall_positive_T_w.htm

ECG: electrocardiogram.

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