Comparison of the procedure with or without right ventriculography
As shown in Table 2, the total procedural time was not significantly different between two groups while the number of fluoroscopy repositioning for intended pacing sites was significantly higher in the non-radiograph group than in the radiograph group. Fluoroscopy repositioning was defined as a change in the target site under fluoroscopy before the deployment of the MicraTMpacemaker. Fluoroscopic use duration and the X-ray exposure dose were significantly greater in the non-radiography group than in the radiograph group.
None of the study participants had procedure-related adverse events or complications such as abnormal pacing parameters, cardiac perforation and effusion, a prolonged hospital stay over 48 hours, or infection. No worsening or development of tricuspid valve regurgitation and other implantation-related complications was observed by post-implantation echocardiograph and follow-up visits.