A case of endocardial mapping for the epicardial pure origin of premature ventricular complex using the time difference between bipolar and unipolar potential

In endocardial mapping of premature ventricular complexes of intramural or epicardial origin, we must be aware that pure origin and exit do not always coincide. In this study, we describe a case of endocardial mapping for epicardial-side premature ventricular complexes of pure origin using the time difference between bipolar and unipolar potentials.