Early T Wave Inversion (Cardiac Memory Pattern)

Abstract

A 32-year-old man was admitted to the coronary care unit because of wide QRS complex tachycardia. 12-lead electrocardiogram showed a monomorphic regular wide QRS complex tachycardia with a ventricular rate of 110 beats/minute and right bundle branch block morphology. The patient was received synchronized shocks at energy levels of 200 Joules with normal sinus rhythm. His electrocardiogram after the termination of the wide QRS complex tachycardia returned to sinus rhythm with T wave inversions in V1- V6 and DII, DIII, aVF. The indicated T-wave inversions demonstrate cardiac memory due to the preceding abnormal ventricular activation caused by tachycardia. Because the T wave inversion occurred after the conversion from tachycardia to sinus rhythm, it is illustrated by the cardiac memory phenomenon