Abstract 2766: Diagnosis of Arrhythmogenic Right Ventricular Dysplasia with Endocardial Electroanatomic Mapping: Remote Magnetic Navigation Voltage Maps are More Accurate than Manual Maps
Electroanatomic endocardial mapping in arrhythmogenic right ventricular dysplasia (ARVD) using the CARTO™ system has shown to be useful in identifying low voltage areas as a marker of fatty infiltration. However, using the conventional manual technique, poor tissue-electrode contact may result in false low voltage areas. Alternately some areas are difficult to reach using the conventional femoral approach and distortions in the RV silhouette may be expected because of excessive catheter pressure on the RV wall. We postulated that magnetic navigation (MN) may produce more accurate maps as it may overcome these limitations. The aim of the present study was to sequentially compare in the same patient 2 RV voltage maps during a single procedure. The first one was done manually and the second one remotely with a MN system (Stereotaxis™). In both cases a 4 mm non-irrigated tip catheter was used. Twelve patients (Male = 8) were included in this prospective study. The mean age was 47±13. All had sustained or non-sustained ventricular arrhythmias. Despite a complete work up, the diagnosis or ARVD remained uncertain before electroanatomic mapping. An area of low voltage was defined as a bipolar voltage <1.5 mV with at least 3 adjacent points in this area. see Table⇓ Using the same number of mapping points, magnetic maps have higher volumes and have smaller low voltage areas than manual ones. These data suggest that MN voltage maps are more accurate and may result in less false positive ARVD detection. Results.