dP/dt measurements observed during pacing from different left ventricular regions Measurements will be observed at the time of the electrophysiology study (EPS) at enrollment. [clinicaltrials_resource:69c271e43334e3f75d933f795cb84e8f]

During the electrophysiology study, the dP/dt measurements will be observed during pacing from different left ventricular regions.

dP/dt measurements observed during pacing from different left ventricular regions Measurements will be observed at the time of the electrophysiology study (EPS) at enrollment. [clinicaltrials_resource:69c271e43334e3f75d933f795cb84e8f]

During the electrophysiology study, the dP/dt measurements will be observed during pacing from different left ventricular regions.