18 Stratos LV/LV-T Technical Manual

Patients assigned to Group 1 received biventricular pacing with CLS-based rate adaptive pacing using BIOTRONIK’s Protos DR/CLS, which is a dual-chamber pulse generator with CLS-based rate adaptive pacing. During this study, the Protos DR/CLS devices were implanted with two ventricular leads: the right ventricular lead was connected to the ventricular port, and the left ventricular lead was connected to the atrial port. Protos DR/CLS was included in this study to evaluate biventricular pacing with a different type of rate adaptive sensor technology.

Patients assigned to Group 2 received biventricular pacing with accelerometer-based rate adaptive pacing using the Stratos LV.

Patients assigned to Group 3 (control group) received right ventricular pacing with accelerometer-based rate adaptive pacing using the Stratos LV. Therefore, 60% of the patients received a Stratos LV device.

Primarily, the study evaluated and compared the functional benefits of CRT between the three randomized groups using a composite endpoint consisting of a six-minute walk test (meters walked) and quality of life measurement (assessed using the Minnesota Living with Heart Failure Questionnaire). Relevant measurements were completed twice for each patient: once at the Baseline evaluation (prior to implant and ablation) and again at a six-month follow-up evaluation. The data collected during this clinical study was used to demonstrate superiority of CRT to RV only pacing. This study also evaluated the safety of both the Protos DR/CLS and Stratos LV devices through an analysis of the complication-free rate through six months. Secondarily, the study also evaluated the superiority of CRT with CLS rate adaptation compared to CRT with accelerometer rate adaptation.