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Substrate ablation is commonly performed in patients with postinfarction cardiomyopathy and ventricular tachycardia (VT). Recognition of fragmented and late potentials during sinus rhythm is a tedious process subject to operator fatigue.The purpose of this study was to assess the value of automated analysis to quantify electrogram fragmentation and to determine the relationship of fragmented regions...
The significance of fractionated electrograms (EGMs) is object of debate, with multiple mechanisms described.Using Rhythmia, a high-density mapping system, we sought to investigate the relationship between specific electrophysiological phenomena and EGM characteristics at those sites.Twenty-five consecutive patients underwent high-density atrial mapping during atrial tachycardias. Bipolar EGMs were...
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