Title :
The impedance catheter: potential for differentiation between hemodynamically stable and unstable arrhythmias
Author :
Khoury, Dirar ; Maloney, James ; McAlister, Hugh ; Simmons, Tony ; Wilkoff, Bruce ; Rudy, Yoram
Author_Institution :
Case Western Res. Univ., Cleveland, OH, USA
Abstract :
An assessment is made of the efficacy of the impedance catheter in sensing relative volumetric changes in the right ventricle as a means of monitoring the hemodynamic status during an arrhythmia. During electrophysiologic testing, 37 arrhythmias were induced in 12 patients. Stroke impedance (peak value minus minimum value) was significantly lower in hemodynamically unstable ventricular arrhythmias (ventricular tachycardia and ventricular fibrillation) than in stable tachyarrhythmias (supraventricular tachycardia and stable monomorphic ventricular tachycardia). Implementation of hemodynamic sensing can improve arrhythmia specificity of the sensing algorithm of future implantable defibrillators and may add options for selective pace termination or cardioversion
Keywords :
bioelectric phenomena; biomedical equipment; cardiology; defibrillators; electric impedance measurement; haemodynamics; patient monitoring; cardioversion; differentiation; electrophysiologic testing; hemodynamic status; hemodynamically stable arrhythmia; impedance catheter; implantable defibrillators; monitoring; relative volumetric changes; right ventricle; selective pace termination; sensing algorithm; stable monomorphic ventricular tachycardia; stable tachyarrhythmias; stroke impedance; supraventricular tachycardia; unstable arrhythmias; ventricular fibrillation; ventricular tachycardia; Cardiology; Catheters; Electric shock; Electrical stimulation; Electrodes; Fibrillation; Hemodynamics; Impedance measurement; Patient monitoring; Testing;
Conference_Titel :
Bioengineering Conference, 1989., Proceedings of the 1989 Fifteenth Annual Northeast
Conference_Location :
Boston, MA
DOI :
10.1109/NEBC.1989.36668
