Comparison of Morphology-Based and Delay-Based Measures for Reference Beat Classification during Atrial Tachycardia

Beat acceptance and rejection during atrial tachycardia are crucial for the compilation of meaningful maps during an electrophysiological study. While state of the art methods compare the delays in activation time between two or more reference electrograms, morphology based beat selection might enhance the quality of the resulting map. This work introduces morphology-based measures for beat selection during atrial tachycardia in a spatially stable reference electrogram and compares them to delay-based measures. In an exemplary patient, the introduced measures proved to be complementary. Using an optimized combination of morphology- and delay-based beat selection criteria will therefore be beneficial for automatic beat selection in electroanatomical mapping systems.