Removing ventricular far-field signals in intracardiac electrograms during stable atrial tachycardia using the periodic component analysis.

Background: Intracardiac electrograms are an indispensable part during diagnosis of supraventricular arrhythmias, but atrial activity (AA) can be obscured by ventricular far-fields (VFF). Concepts based on statistical independence like principal component analysis (PCA) cannot be applied for VFF removal during atrial tachycardia with stable conduction.

Methods: A database of realistic electrograms containing AA and VFF was generated.