Evolution of left ventricular lead electrical variables during follow up
| Type of LV lead | Time of implantation | Month 3 | End of follow up | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T (V) | R (mV) | I (Ω) | T (V) | R (mV) | I (Ω) | T (V) | R (mV) | I (Ω) | |||||
| Medtronic 2188 | 1.4 (0.9) | 12.5 (6.0) | 681 (216) | 1.7 (0.8) | 14.0 (6.0) | 624 (245) | 2.0 (1.0) | 10.5 (5.0) | 637 (388) | ||||
| Medtronic 2187 | 0.9 (0.7) | 14.0 (8.0) | 739 (184) | 1.7 (0.7) | 9.0 (4.0) | 492 (150) | 1.9 (0.9) | 10.0 (7.0) | 567 (242) | ||||
| Recent leads | 0.9 (0.4) | 12 (5.5) | 749 (171) | 1.5 (0.8) | 7.2 (3.7) | 445 (117) | NA | NA | NA | ||||
| Old leads | 1.1 (0.9) | 14.6 (6.0) | 705 (113) | 2.3 (0.2) | 13.0 (2.0) | 429 (73) | 1.6 (0.7) | 16.0 (4.0) | 434 (121) | ||||
| All | 1.1 (0.7) | 13.0 (7.0) | 720 (190) | 1.7 (0.7) | 11.0 (5.0) | 526 (193) | 1.9 (0.9) | 11.0 (5.0) | 600 (332) | ||||
Values are mean (SD).
I (Ω), pacing impedance (ohms); R (mV), R wave amplitude (mV); T (V), pacing threshold (volts).