Signature Signal Strategy: Electrogram Based Ventricular Tachycardia Mapping Nayyar et al. Signature electrogram based VT ablation

Multiple decades of work have recognized complexities of substrate responsible for ventricular tachycardia (VT). There is enough evidence that three critical components of a re-entrant VT circuit, namely region of slow conduction, zone of unidirectional block and exit site, are located in spatial vicinity to each other in the ventricular scar. Each of these express characteristic electrograms in sinus rhythm, at initiation of VT and during VT, respectively. Despite this, abnormal electrograms are widely targeted without appreciation of these signature electrograms during contemporary VT ablation.

Source: Heart Rhythm - June 22, 2020 Category: Cardiology Authors: Sachin Nayyar, Eugene Downar, Abhishek P. Bhaskaran, St éphane Massé, Kumaraswamy Nanthakumar Source Type: research