R WAVE PEAK TIMES DISPLAYED IN BODY SURFACE ISOCHRONE MAPS OF YOUNG ADULT MEN

Authors

  • Katarína Kozlíková Institute of Medical Physics and Biophysics, Faculty of Medicine, Comenius University in Bratislava
  • Michal Trnka Institute of Medical Physics and Biophysics, Faculty of Medicine, Comenius University Bratislava, Bratislava, Slovak Republic

DOI:

https://doi.org/10.14311/CTJ.2025.1.01

Abstract

In standard 12-lead electrocardiography, the peak time or intrinsicoid deflection is defined as the activation time of the ventricular muscle lying under the exploratory electrode. It serves as an easy measurable parameter used in the diagnosis of cardiac diseases related to disturbed or delayed ventricular activation. The aim of this study was to analyse the R wave peak isochrone maps in young adult volunteers using the time normalisation of the QRS complex. Body surface isochrone maps of the peak time were constructed and analysed in 13 healthy young men. It was found to start always on the anterior chest surface and mainly in its upper half. After spreading downward and leftward, it mostly ended mainly in the back chest, mainly in its upper half, and around the right shoulder. This agrees with previously published results of mean maps, also in older subjects without known cardiovascular diseases obtained from different mapping lead systems. The R wave peak times obtained from our maps also agreed with known intrinsicoid deflections for the standard leads V5 and V6, published previously. To conclude, the R wave peak isochrone maps allow simple visualisation of activation sequence, which will differ in cardiac diseases related to disturbed or delayed ventricular activation, like ventricular hypertrophy, myocardial infarction or bundle branch blocks.

Author Biography

  • Katarína Kozlíková, Institute of Medical Physics and Biophysics, Faculty of Medicine, Comenius University in Bratislava

    She has been working at the Faculty of Medicine, Comenius University Bratislava since 1983, first at the Institute of Pathological Physiology, and from 1997 until now as an associate professor of Physics at the Institute of Medical Physics and Biophysics; she was its head in the years 1997 – 2002. In the years 2012 – 2022, she was the vice president, and since 2023, she is the president of the Slovak Society of Medical Physics and Biophysics of the Slovak Medical Society.

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Published

2025-05-20

Issue

Vol. 55 No. 1 (2025): Current Issue

Section

Original Research

License

Copyright (c) 2025 Katarína Kozlíková, Michal Trnka

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