Leadless pacing with Micra TPS: A comparison between right ventricular outflow tract, mid‐septal, and apical implant sites

• DOI: 10.1111/jce.14083
• Publication Date: 2019-07-24T05:12:25Z
• Authors: Christophe Garweg; Bert Vandenberk; Stefaan Foulon; Peter Haemers; Joris Ector; Rik Willems
• Keywords: Ventricular outflow tract

Abstract Background With its steerable transcatheter delivery system, the Micra can be deployed in nonapical positions within right ventricle, potentially allowing reduction of paced QRS width. We sought to evaluate safety and long‐term performance ventricular outflow tract (RVOT) pacing using system (TPS). also compared between RVOT, mid‐septal, apical implant positions. Methods All patients who underwent a TPS implantation at University Hospitals Leuven were enrolled this observational study. Right (RV) position device was assessed on per‐procedural ventriculography. Paced analyzed follow‐up completed 1 month then every 6 months. Results Among 133 included (mean follow‐up: 13 ± 11 months), 45 implanted 58 midseptally, 30 apex. procedures successful no pericardial effusion encountered days post‐implant. Two major complications reported with devices Pacing impedance significantly higher RVOT mid‐septal ( P < .001). threshold R‐wave amplitude did not differ over time either position. The median narrowest duration observed (142 ms) (159 ms; .001), (181 Conclusion Implantation is safe feasible. Electrical comparable complexes achieved pacing.