[Microvolt T-wave alternans as a novel method of analysis of changes of repolarization phase and detection of latent electrical instability of the myocardium].

This review considers of modern concepts of microvolt T-wave alternans (TWA): its pathophysiological basis at cellular level, particulars of quantitative analysis of TWA, modulating effects of autonomic nervous system and drugs, prognostic efficacy in predicting susceptibility to ventricular arrhythmia in comparison with other modern prognostic factors of sudden cardiac death.