This case report illustrates the phenomenon of cardiac memory following radiofrequency ablation of an accessory pathway in WPW syndrome, where transient T wave abnormalities occur due to changes in ventricular activation sequence.
A 25-year-old man was seen in the cardiac outpatient clinic with a 10-year history of palpitation. The palpitation, which occurred infrequently and with no obvious precipitant, always started suddenly and was described as fast and regular, associated with a feeling of light-headedness. The attacks usually terminated spontaneously, although on two occasions he had attended casualty following a prolonged episode, where the attacks had been terminated with adenosine. The electrocardiogram (ECG) recorded in the outpatient clinic is shown (Figure 1). What is the diagnosis?
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Sporton et al. (2001) studied this question.
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