Noninvasive topical diagnostics of atrial arrhythmias

The aim of this study was to test the accuracy of the noninvasively obtained ventricular activation (isolated epicardial vs. combined endo-epicardial mapping) as compared with that of standard invasive mapping in patients with atrial arrhythmias. A total of 16 patients (5 male and 11 female) aged 21 to 65 years (mean age of 48.8 years) with atrial arrhythmias were examined. All patients underwent noninvasive electrophysiological examination, which was performed with Amycard System, and subsequent intracardiac mapping and radiofrequency catheter ablation. Comparison of the results obtained from the noninvasive combined epi-endocardial electrophysiological examination and the intracardiac electrophysiology study demonstrated that the arrhythmogenic focus localizations coincided in 15 cases. Thereby, the accuracy of the noninvasive mapping was 93.7%.