Figure 1. GXT ECG progression. (A) Resting ECG demonstrating normal sinus rhythm with baseline nonspecific ST abnormalities most consistent with early repolarization. (B) ECG tracing at the onset of chest pain. Hyperacute T waves are seen. (C) ECG during recovery with persistent hyperacute T waves. (D) ECG tracing later in recovery with ST segment elevations in the inferior and lateral leads. Two ventricular beats are seen, likely paroxysmal accelerated idioventricular rhythm.