Subepicardial ischemia vs cardiac memory after tachycardia by intranodal reentry. case report and literature review

Cardiac memory is an electrophysiological property that expressed as persistent changes in response to variations the rate and sequence of cardiac electric activation defined T wave on electrocardiogram after a period rhythms wide QRS widened, becomes evident once normal ventricular pattern restored.1 The first evidence its existence arises from case reports where polarity were observed transient episodes tachyarrhythmias. Subsequently, it was demonstrated how by external sources prolonged way induces electrocardiogram, those persist eliminating this source.6,8 Electrical can occur short long term, when short-term, are due modulation electrical activity individual cells or cell interaction, while long-term involves synthesis proteins / structural changes.8