Results
The study enrolled 50 patients (mean age 70±14 years, 44% female). LBBAP with SDL was successful in 20/23 (87%) patients compared to 24/27 (89%) of patients in the LLL group (p=0.834). Screw attempts, screw implant depth, procedural and fluoroscopy times were comparable among both groups. Acute LBBAP thresholds were low and comparable between SDL and LLL (0.5±0.15V versus 0.4±0.17V, p=0.251). Pacing thresholds remained low at 3±2.1 months of follow up in both groups and no lead revisions were necessary. Post procedural echocardiography revealed a septal coronary artery fistula in one patient with SDL LBBAP.