Complication is any device-or-procedure related serious adverse event, or serious adverse device effect, including those that prevented initial implantation. Complications possibly related or related to COVID-19 were excluded. Percentage of participants free from complications are reported

First 200 Aveir VR subjects. Subjects who withdrew or died prior to the 6-week post-implant visit without a complication were excluded.

Complication is any device-or-procedure related serious adverse event, or serious adverse device effect, including those that prevented initial implantation. Complications possibly related or related to COVID-19 were excluded. The complication free rate reported describes the Kaplan-Meier estimate of the percentage of patients that had no complications at the given time point.

First 210 Aveir VR subjects within the enrolled population. Subjects who withdrew or died prior to the 12-Month post-implant visit without a complication were censored.

Success Rate is percentage of subjects who have acceptable pacing threshold and sensing amplitudes, which are defined as pacing threshold <=2.0V at 0.4 ms pulse width and R-wave amplitude =>5.0 mV or => value at implant.

First 200 subjects within the enrolled Aveir VR population with a successful implant

Success Rate is percentage of subjects who have acceptable pacing threshold and sensing amplitudes at 12-Month post-implant visit, which are defined as pacing threshold <=2.0V at 0.4 ms pulse width and R-wave amplitude =>5.0 mV or => value at implant.

First 210 subjects within the enrolled Aveir VR population with a successful implant

Temperature-based rate response feature was evaluated to determine whether an appropriate and proportional rate response was achieved during maximal effort graded treadmill exercise testing protocol (CAEP). Subjects were asked to perform a six-minute walk test to identify optimal sensor parameters prior to conducting a CAEP test. Exercise test data provide an estimate of the slope of the normalized increase in sensor-indicated rate versus normalized workload for each subject. Normalizing a variable eliminates the unit. Since both axes are normalized, there is no unit of measure. The vertical axis is derived from the difference of the sensor indicated rate at each exercise stage and the base rate, divided by the difference of the age-predicted maximum heart rate and base rate. Values on the horizontal axis are derived from the difference in the workload at each exercise stage and resting workload, divided by the difference of the maximum achieved workload and resting workload.

Subjects within the enrolled Aveir VR population with a successful implant who completed the six-minute walk test and completed at least stage 3 of the CAEP.

All-Cause Mortality through 2 years among subjects implanted with the Nanostim Leadless Pacemaker. The Nanostim Leadless Pacemaker is functionally similar to the Aveir VR Leadless Pacemaker, and was evaluated in The LEADLESS II IDE Study (Phase I) - NCT02030418. For detailed demographic and study information including adverse events, refer to NCT02030418

All subjects within the implanted Nanostim population from The LEADLESS II IDE Study (Phase I) - NCT02030418