Official journal of the Slovak Society of Cardiology,
Slovak Society of Hypertension and Slovak Association for Cardiac Arrhythmias

Cardiology Letters 2017, 26(1):33-38

Dynamic beat-to-beat changes of the cardiac electric field due to psycho-emotional load

Kellerová E, Szathmáry V
Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, Bratislava, Slovak Republic

The aim of the study was to analyze the up-to-now unexplored beat-to-beat dynamism of the previously described reactive changes in ventricular repolarization, due to sympathetic activation in a psycho-emotional stress situation. R-R intervals, selected parameters of depolarization and repolarization integral body surface potential maps (BSPMs) and blood pressure were evaluated in sitting subjects at rest and during the mental arithmetic test. Despite negligible effects on depolarization, the cognitive stress induced significant dynamic changes of the main repolarization parameters. The amplitudes of the integral ST and QRST BSPMs and the ST non-dipolarity index (NDI(ST)) significantly decreased and α-angle between the QRS and ST eigenvectors significantly rose. These reactive changes were gradual, began with a short latency, reaching their maximum after 30-60 seconds. The character of these dynamic BSPMs changes corresponds to the pattern of the complex sympathergic cardiovascular response to mental tasks.

Keywords: integral body surface potential maps ECG; ventricular repolarization; beat-to-beat dynamism; reactive changes; psycho-emotional stress

Published: January 1, 2017  Show citation

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Kellerová E, Szathmáry V. Dynamic beat-to-beat changes of the cardiac electric field due to psycho-emotional load. Cardiology Letters. 2017;26(1):33-38.
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