Key result
Simple time domain analysis methods performed equally well compared to calculation-intensive frequency domain methods for detecting ventricular tachycardia and fibrillation.
Why the study?
Do simple methods perform as well as calculation-intensive methods in detecting ventricular tachycardia and fibrillation from endocardial electrograms?
Observational (n=28)
Do simple methods perform as well as calculation-intensive methods in detecting ventricular tachycardia and fibrillation from endocardial electrograms?
Simple time-domain methods are as effective as calculation-intensive frequency-domain methods for detecting ventricular arrhythmias in implantable defibrillators.
Simple time-domain methods may suffice for VT/VF detection in ICDs; leaves open prospective real-time validation.
Implantable cardioverter/defibrillator devices use different algorithms to recognize ventricular tachycardia and ventricular fibrillation from sinus rhythm. However problems remain, especially differentiating physiologic high rhythms from life threatening situations. In order to test detection abilities of different methods, off-line analysis was performed in time (rate counting, autocorrelation function, statistical methods) and in frequency (digital fast Fourier transform) domains on bipolar electrograms that were obtained in 28 patients during the implantation of an automatic defibrillator. Tachycardia and fibrillation were induced and recordings made of the ECG, right ventricular electrogram and aortic pressure. Results showed that even simple methods perform equally well compared to calculation intensive methods.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Aubert et al. (2002) conducted an observational in Ventricular tachycardia and ventricular fibrillation (n=28). Time domain analysis methods (rate counting, autocorrelation, statistical) vs. Frequency domain analysis (digital fast Fourier transform) was evaluated on Detection abilities of different methods for differentiating rhythms. Simple time domain analysis methods performed equally well compared to calculation-intensive frequency domain methods for detecting ventricular tachycardia and fibrillation.
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