Title :
Patterns of activation during ventricular fibrillation in open chest dogs
Author :
Chen, Peng-Sheng ; Worley, Seth J. ; Ideker, Raymond E.
Author_Institution :
Dept. of Med., California Univ., Med. Center, San Diego, CA, USA
Abstract :
Patterns of activation of electrically induced ventricular fibrillation (VF) were studied with computerized mapping techniques. The results showed that each of C.J. Wiggers´ (1940) four stages of VF was accomplished by an electrical correlate: reentry at the stimulus site, multiple wavelets traversing large regions with similar cycle lengths, multiple wavelets confined to fixed regions with different cycle lengths, and asynchronous electrical activity becoming intermittent. A transmural gradient of activation rate was demonstrated at the third and fourth stages of VF
Keywords :
bioelectric phenomena; cardiology; activation patterns; activation rate transmural gradient; asynchronous electrical activity; computerized mapping techniques; cycle length; multiple wavelets; open chest dogs; reentry at stimulus site; ventricular fibrillation; Chaos; Defibrillation; Dogs; Electric breakdown; Electric shock; Electrodes; Fibrillation; Heart; Pathology; Rhythm;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95584
