Table 5.
Summary of previous studies published on PICM and response to CRT upgrade
| Study | Design | n | Female (%) | RV pacing (%) | Time to upgrade (mo) | pQRS preupgrade (ms) | Follow-up (mo) | Response |
|---|---|---|---|---|---|---|---|---|
| Nazeri et al13 | Case series | 21 | 38.1 | 40.9 ± 13.2 | 3.8 | 159 ± 27 | 4.9 | 76 |
| Khurshid et al6 | Case series | 69 | 37.7 | 95.7 ± 9.1 | 56.4 | 184 ± 21.7 | 7.7 | 85.5 |
| Gwag et al11 | Case cohort | 7 | 42.9 | 99.6 ± 0.9 | NR | 185.5 ± 51.4 | 15.8 | 85.7 |
| Schwerg et al12 | Case series | 20 | 46 | 99 ± 1 | 144 | NR | 36 | 85 |
| Present study | Case series | 43 | 30.2 | 89.5 ± 22.5 | 3.2 | 186.1 ± 23.3 | 9.4 | 88.4 |
CRT = cardiac resynchronization therapy; NP = not reported; pQRS = paced QRS; RV = right ventricular.