AP19-00730 Abstract View

Introduction : Sinoatrial dysfunction and atrial arrhythmias frequently coexist in presence of structural heart disease (SHD). While atrial remodelling is frequently implicated, there is paucity of data on electrical activation from an endocardial-epicardial perspective. We tested the hypotheses that electrical dissociation and signal fractionation will be present in the sinus node region with overdrive suppression with SHD. We also assessed activation and conduction dynamics of the sinus node region from an endocardial-epicardial perspective.