LP implantations
The operative characteristics of LP implantations are summarized in Table 3. Temporary pacing with an active fixation lead was instituted in 5 patients as a bridge to the Micra implant. The median interval from the TLE procedure to the LP implantation procedure was 14.5 days. One patient with severe dementia (patient No.4) underwent a simultaneous TLE procedure and LP implantation. One patient (patient No.2) underwent a Micra implantation 132 days after the TLE procedure, since she had an intractable severe inflammatory sign even after a complete device system removal. All 8 patients achieved successful LP implantation with no major or minor procedural complications including no access site complications. The mean LP implant time was 33.8 ± 20.4 minutes. The mean electrical measurements of the LP were 8.3 ± 4.6 mV for the R-wave with an impedance of 580.0 ± 62.6 ohm and pacing threshold of 0.8 ± 0.24 V after an average of 1 or 2 device deployment attempts per patient.