Aims To test whether: (1) epicardial MAP and EG record different signals during the same tachyarrhythmias (TA); (2) the correlation between close and far bipolar signals is similar in TA. Methods: Different TA's were induced in isolated perfused feline hearts. Two bipolar (close sites) epicardial EG and two MAP electrodes were attached to LV (10mm apart). Bipolar EG electrodes were also attached to RV (far EG). 30' recordings were sampled at 200 Hz per channel. Coherence spectrum analysis (CSA) (scale 0-1) was used to assess correlation between electrical activity signals. Results: (n=33). Mean CSA value was higher in MAP vs close bipolar EG signals (0.6± 0.24 vs 0.54±0.2 respectively) (p<0.04), due to high MAP prevalence on CSA> 0.6. Lower CSA values were obtained with far (0.48±0.21) vs close EG sites (p<0.08). Conclusions: Electrical activity during TA is displayed differently by MAP and EG. It is associated with the difference in correlation between close and far sites.
|Number of pages||3|
|Journal||Computers in Cardiology|
|State||Published - 1995|
|Event||Proceedings of the 1995 Conference on Computers in Cardiology - Vienna, Austria|
Duration: 10 Sep 1995 → 13 Sep 1995