Comparison of measurements at baseline at the three pacing sites
| HRA pacing | CS pacing | Biatrial pacing | |
|---|---|---|---|
| Data are mean (SD). | |||
| BiA, biatrial; A Vmax, peak velocity of the atrial filling wave; CO, cardiac output; CS, coronary sinus; E Vmax, peak velocity of the early filling wave; HRA, high right atrial; MBP, mean blood pressure; PCWP, pulmonary capillary wedge pressure; S-A end, interval from the atrial pacing spike on the ECG to the end of the atrial filling wave; S-A peak, interval from the atrial pacing spike on the ECG to the peak of the atrial filling wave; TVI, mitral flow time velocity integral. | |||
| *p<0.01 v baseline; †p<0.001 v HRA; ‡p<0.001 v CS; §p<0.01 v CS; ¶p<0.05 v HRA. | |||
| P wave duration (ms) | 133 (25) | 133 (27) | 96 (15)*†‡ |
| E Vmax (cm/s) | 46.4 (14.6) | 45.7 (14.8) | 48.5 (15.8) |
| A Vmax (cm/s) | 63.8 (17.6) | 62.4 (16.6) | 67.8 (19.3)¶§ |
| TVI (cm) | 7.5 (3.4) | 7.8 (3.0) | 8.3 (3.4)†§ |
| S-A peak (ms) | 186 (16) | 172 (19)† | 153 (15)†‡ |
| S-A end (ms) | 250 (22) | 242 (24)† | 227 (23)†‡ |
| MBP (mm Hg) | 107 (21) | 109 (20) | 108 (19) |
| CO (l/min) | 3.71 (0.93) | 3.79 (0.97) | 4.09 (1.01)†‡ |
| PCWP (mm Hg) | 15.0 (6.9) | 14.2 (6.0)¶ | 13.2 (5.9)+§ |