Detection of U wave activity in healthy volunteers by high-resolution magnetocardiography

Introduction: The purpose of our study was to prove the existence of the U wave using. magnetocardiograms (MCGs) Methods: The 31-channel MCGs of 25 healthy volunteers were recorded The onset of the U wave was defined by newly developed spatial con elation analysis, and the end, by different approaches Results: A U wave could be proved in all volunteers In 10 volunteers (heart rate, 57 +/- 19 beats/min) in whom the U wave was found to be separated from the following P wave, the U wave's end could be determined as a threshold value (U wave duration, 310 +/- 24 in In 15 volunteers (heart rate, 70 +/- 38 beats/min), the end of the U waves was concealed by a continuous transition of the U waves into the following P waves Conclusions: The U wave seems to be a regular phenomenon and has a distinct spatiotemporal assembly Crown Copyright (C) 2010 Published by Elsevier Inc All rights reserved