Baseline | 100% O2 + 40 ppm NO | p value | |
---|---|---|---|
Positive vasodilatory response (n = 29) | |||
Mean PA pressure (mmHg) | 26 ± 12 | 22 ± 10 | <0.001* |
Mean PAWP (mmHg) | 13 ± 6 | 14 ± 7 | 0.11 |
Cardiac index (L/min/m2) by CMR flow | 3.0 ± 0.2 | 2.9 ± 0.2 | 0.06 |
PVRi (WU.m2) by CMR flow | 4.2 ± 3.2 | 2.6 ± 2.2 | <0.001* |
RV end diastolic volume (mL) | 96 ± 63 | 91 ± 63 | 0.014* |
RV end systolic volume (mL) | 39 ± 32 | 36 ± 35 | 0.12 |
RV stroke volume (mL) | 57 ± 34 | 55 ± 32 | 0.14 |
RV ejection fraction (%) | 62 ± 11 | 63 ± 12 | 0.19 |
Negative vasodilatory response (n = 15) | |||
Mean PA pressure (mmHg) | 25 ± 12 | 24 ± 11 | 0.08 |
Mean PAWP (mmHg) | 11 ± 5 | 11 ± 4 | 0.65 |
Cardiac index (L/min/m2) by CMR flow | 2.7 ± 0.8 | 2.7 ± 0.8 | 0.98 |
PVRi (WU.m2) by CMR flow | 4.9 ± 3.8 | 4.9 ± 3.4 | 0.97 |
RV end diastolic volume (mL) | 79 ± 23 | 81 ± 26 | 0.44 |
RV end systolic volume (mL) | 35 ± 15 | 33 ± 17 | 0.33 |
RV stroke volume (mL) | 45 ± 14 | 48 ± 12 | 0.014* |
RV ejection fraction (%) | 58 ± 11 | 62 ± 13 | 0.008* |