NONINVASIVE ASSESSMENT OF ACTIVATION ANDREPOLARIZATION DYNAMICS BY QRS AND QRSTINTEGRAL MAPS

摘要

Several studies emphasize the utility of dynamic parameters and/or repolarization disparity in the assessment of arrhythmia vulnerability. In this study the spatio-temporal action potential dynamics were assessed by the use of high resolution long BSPM records taken from a group of arrhythmia patients, with a typical length of 5 minutes. The association between the activation sequence and the repolarization was based on the simultaneous analysis of QRS and QRST integrals. We have proved that QRS and QRST integral maps of ventricular ectopic beats show significant changes compared to the normal sinus beats, both in amplitudes and in patterns. The altered sequence of activation is immediately associated by a strictly organized, heterogeneous rearrangement of ventricular gradient distribution.