Noninvasive electrocardiographic mapping of ventricular arrhythmias

The aim of this study was to test the accuracy of the noninvasively obtained ventricular activation as compared with that of standard invasive mapping in patients with ventricular arrhythmias. A total of 81 patients (30 male and 51 female) aged 20 to 67 years (mean age of 43.5 years) with ventricular arrhythmias of different localization and etiology were examined. All patients underwent noninvasive electrophysiologic examination, which was performed with Amycard System and subsequent intracardiac mapping and radiofrequency catheter ablation. Comparison of data from the noninvasive and intracardiac electrophysiology studies showed identical localization of the arrhythmogenic foci in 73 cases; discordant results were documented in 8 patients. Thereby, the accuracy of the noninvasive mapping in patients with arrhythmias was 90.12%.