Title :
Strength-duration relationship for biphasic defibrillation in dogs
Author :
Lang, Douglas J. ; Swanson, David K. ; Bach, Stanley M. ; Shapland, J. Edward
Author_Institution :
Cardiac Pacemakers Inc., St. Paul, MN, USA
Abstract :
The relationship between biphasic shock duration and defibrillation efficacy was measured in dogs with a catheter/patch lead system to better define defibrillation mechanisms with this waveform. The defibrillation energy, voltage, and current at 50% defibrillation success were measured for short (6 ms) and long (12 ms) biphasic shocks with similar fixed tilts and pulsewidth ratios (60:40). The short biphasic waveform had comparable energy requirements, but higher voltage (42%) and currents (39%) than the long biphasic shock (p<0.01). For these pulse widths, biphasic defibrillation in the dog follows a strength-duration relationship, with constant defibrillation energy requirements
Keywords :
bioelectric phenomena; cardiology; 12 ms; 6 ms; biphasic defibrillation; biphasic shock duration; defibrillation efficacy; defibrillation energy; dog; pulsewidth ratio; strength-duration relationship; Catheters; Defibrillation; Dogs; Electric shock; Electrodes; Pacemakers; Pulse measurements; Space vector pulse width modulation; Testing; Voltage;
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.1989.95581
