Ventricular Repolarization Dispersion during Ischemia Course Measured by Temporal and Spatial Electrocardiographic Parameters

P.D. ARINI, FH BAGLIVO, J.P. MARTINEZ, P. LAGUNA

Bologna

Conferencia; XXXV International Conference on Computers in Cardiology; 2008

Computers in Cardiology, Inc.

In this work we studied the evolution of increased ventricular repolarization dispersion (VRD) in the ECG during ischemia induced by Percutaneous Transluminal Coronary Angioplasty (PTCA). T-wave duration is measured by an automatic delineator and proposed as a index to quantify increased VRD. Moreover, spatial complexity of repolarization is measured by Singular Value Decomposition (SVD) related indexes. Results showed a statistically significant widening of T-wave peak-to-end during PTCA procedure in RCA and LAD occluded patients. Besides, a statistically significant dynamic change of the dipolar components was observed during PTCA in RCA, LAD and LCx occluded patients. On the other hand, the relative energy of non-dipolar components did not change during the time course of increased VRD evolution.