Table 2.
Demographic Data
| Quadripolar (n = 319) | Bipolar (n = 287) | p Value | |
|---|---|---|---|
| Age (yrs) | 70.4 ± 11 | 68.7 ± 10 | 0.06 |
| Female | 50 (15.7) | 48 (16.7) | 0.74 |
| Ischemic heart disease | 181 (56.7) | 190 (66.2) | 0.02 |
| Sinus rhythm | 303 (95.0) | 48 (83.3) | <0.001 |
| QRS duration (ms) | 159 ± 6.2 (n = 238) |
160 ± 5.1 (n = 201) |
0.07 |
| NYHA functional class III symptoms | 183 (76.9) (n = 238) |
145 (72.1) (n = 201) |
0.10 |
| Mobitz II/complete heart block | 9 (2.8) | 14 (4.9) | 0.21 |
| % Biventricular pacing | 94.6 ± 1.6 | 94.4 ± 1.5 | 0.11 |
| LV lead upgrade | 8 (2.5) | 61 (21.3) | <0.001 |
| Length of stay post-implantation (days) (elective) | 1.2 ± 2.3 | 1.2 ± 1.6 | 1.00 |
| Length of stay post-implantation (days) (inpatient) | 5.0 ± 8.5 | 5.2 ± 7.2 | 0.76 |
Values are mean ± SD or n (%).
LV = left ventricular; NYHA = New York Heart Association.