Table 2.
Hemodynamic and echocardiographic assessments.
| Optimized setting | RV-only pacing | ||
|---|---|---|---|
| Heart rate (bpm) | 74.6±8.9 | ||
| AV delay (ms) | 157.6±22.3 | ||
| LVEF (%) | 34.2±7.8 | 31.6±7.2 | |
| UCG | PEP (ms) | 151.0±43.6 | 172.3±43.9⁎ |
| LVET (ms) | 271.1±40.3 | 270.1±29.4 | |
| PEP/LVET | 0.56±0.17 | 0.65±0.20⁎ | |
| AoVTI (cm) | 13.9±3.5 | 12.4±3.3⁎ | |
| ICG | PEP (ms) | 159.4±25.0 | 186.2±29.8⁎ |
| LVET (ms) | 261.2±21.8 | 255.0±22.8⁎ | |
| PEP/LVET | 0.62±0.13 | 0.74±0.16⁎ | |
Data are expressed as mean±SD.
Pacing rate and A-V delays were not different between the two settings.
Abbreviations: AoVTI, velocity-time integral of aortic flow; AV, atrio-ventricular; ICG, impedance cardiography; LVEF, left ventricular ejection fraction; LVET, left ventricular ejection time; PEP, pre-ejection period; RV, right ventricle; UCG, Ultrasonic Cardiography.
⁎
p<0.001 vs. optimized pacing.