Optimize RV Selective Site Pacing Clinical Trial

Inclusion Criteria: * Subjects that are expected to be paced in the right ventricle (RV) greater than 90 percent of the time * Subjects with an ejection fraction of greater than 40 percent within 3 months prior to enrollment * Subjects greater than 18 yrs of age * Subjects that are indicated for a dual chamber pacemaker * Subjects that will be implanted with a market released dual chamber Medtronic pacemaker and 3830 SelectSecure Lead in the ventricle Exclusion Criteria: * Subjects indicated for cardiac resynchronization therapy (CRT) device (based on American College of Cardiology/American Heart Association/Heart Rhythm Society guidelines) * Subjects indicated for an implantable cardiac defibrillator (ICD) * Subjects with permanent atrial fibrillation (AF) * Subjects with expected managed ventricular pacing turned on * Subjects with a previously implanted pacemaker, ICD, or CRT device * Subjects with an myocardial infarction (MI) within 3 months prior to enrollment * Subjects that received bypass surgery within 3 months prior to enrollment * Subjects that had valve replacement within 3 months prior to enrollment * Subjects where a RV lead cannot be placed, (i.e., complex congenital heart disease * Subjects with a mechanical right heart valve * Women who are pregnant or nursing * Significant co-morbidity preventing study completion * Terminal conditions with a life expectancy of less than two years * Participation in another study that would confound the results of this st…