His Bundle Recording From Subclavian Vein

The purpose of this prospective observational study is to investigate whether obtaining a His Bundle recording from the subclavian vein using a stylet driven pacemaker lead and commercially available sheath can be done in a quick and reliable manner. Included in the study are patients undergoing permanent pacemaker implantation at Good Samaritan and Bethesda North Hospitals. The main outcome is successful recording of a His bundle potential. Secondary outcomes are the time necessary to record the His bundle and the measurement of the pacing threshold.