Editorial: Cardiac or T wave memory after radiofrequency ablation of right ventricular outflow tract ectopics

Cardiac or T wave Memory after Radiofrequency ablation of Right ventricular outflow tract ectopics.Introduction: The term cardiac or T wave memory describes the phenomenon of persistent T wave abnormalities, for a variable length of time, even when the QRS abnormality originally responsible for the T wave changes has returned to normal.Table 1 lists situations where T wave memory is observed.The T wave changes in the above-mentioned conditions are secondary to abnormal depolarization, but they remain abnormal even after the abnormal depolarization has returned to normal.Generally, the direction or the vector of the T wave is the same as that of the previously abnormal QRS, hence the term Cardiac or T wave memory.These changes persist for a period of time, which varies from days to weeks, before returning to normal.T wave memory was first reported by Campbell in 1942 (1) and T wave changes following ventricular pacing was reported by Chatterjee et al in 1969 (2).