Title :
Effect of segment length on the estimation of magnitude-squared coherence in an experimental model of ventricular tachycardia
Author :
Sierra, Gilberto ; De Jesus Gomez, Maria ; Le Guyader, Pierre ; Savard, Pierre ; Nadeau, Reginald
Author_Institution :
Centre de Recherche, Hopital du Sacre-Coeur, Montreal, Que., Canada
fDate :
31 Oct-3 Nov 1996
Abstract :
The present paper investigates the effect of the segment length on the accuracy of the magnitude-squared coherence as a method able to discriminate monomorphic and polymorphic ventricular tachycardias, when applied to electrograms in a canine model. The magnitude-squared coherence function was estimated using four different segment lengths; 128, 256, 512 and 1024 samples: The highest accuracy (93.1%) was obtained with the segment length of 1024 samples and the lowest (84.3%) with the segment length of 128 samples. Segment length as an element influencing resolution should be taken in consideration for more reliable results
Keywords :
electrocardiography; medical signal processing; spectral analysis; canine model; coherence spectrum; electrograms; experimental model; magnitude-squared coherence estimation; monomorphic ventricular tachycardias; polymorphic ventricular tachycardias; resolution; segment length effect; ventricular tachycardia; Arteries; Coherence; Dogs; Electrodes; Fast Fourier transforms; Frequency domain analysis; Frequency measurement; Rhythm; Sampling methods; Testing;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.652807
