Outcomes
The primary outcomes of interest included VA events, hospitalization, and all-cause mortality. For hospitalization and mortality outcomes, only events observed within the confines of the given patient’s interrogation date range were counted. Secondary outcomes included ventricular pacing burden, required therapies for ventricular events (i.e. anti-tachycardia pacing and/or ICD shock), and stroke rates between the two groups. Similar to hospitalization and mortality, stroke rates within the defined interrogation dates for a given patient were counted.