Right ventricular pacing: the best site is yet to be defined

The right ventricular (RV) apex is the traditional site to provide stable and reliable chronic ventricular pacing. Interest in alternate site pacing has grown since RV apical pacing has been associated with increased mortality and morbidity compared to normal atrio-ventricular conduction.1'4 Alternate pacing sites include the RV septum and outflow tract.