Use of selected quantitative parameters of the electric field of the heart in evaluating the presence and site of preexcitation.
Electrocardiographic methods play a decisive role in evaluation of the health condition of subjects with WPW pattern. The authors examined 54 patients with WPW pattern with different degrees of preexcitation. The presence of preexcitation and the localization of its focus was determined by surface electrocardiographic mapping using the original Czechoslovak computer equipment KARDIO-SMEP 01.0. The duration of ventricular activation was determined according to root mean square signals. By means of potential and temporo-spatial analysis of peak negative regions of instantaneous maps (in 2 ms intervals) they determined the duration of the period of proper preexcitation, of fusion of the two activation events, and of the end depolarization of the ventricles. In localizing the preexcitation focus they proceeded according to the criteria of Benson et al. (1982) with individual evaluation of quantitative preexcitation parameters of ECG maps and according to vector analysis of the delta wave. Quantitative and temporo-spatial evaluation of the mutual relationship of the two activation events in WPW pattern allows to establish reliably the presence, degree and focus localization of preexcitation even at a low degree of preexcitation and at a low-potential level of the preexcitation surface activity on ECG maps.
Cagán
S
S
Filipová
S
S
Jurkovicová
O
O
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology*