A new method, which uses Magnitude-Squared Coherence (MSC) spectrums between unipolar electrograms recorded from the epicardial surface, is presented to characterize the organization of electrical activity in the myocardial muscles. In a canine study, unipolar electrograms were recorded from 112 epicardial sites during both Normal Sinus Rhythm (NSR) and Ventricular Fibrillation (VF). As a result, average coherence at dominant frequencies during NSR was found to be 0.92 ± 0.01, and during VF 0.41 ± 0.03. Further, the average MSC between electrograms from two sites was found to decrease with increasing distance during NSR and VF.
|Number of pages||2|
|Journal||Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings|
|Issue number||pt 1|
|State||Published - Dec 1 1994|
|Event||Proceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA|
Duration: Nov 3 1994 → Nov 6 1994