TABLE 1

Pulmonary haemodynamics at rest and exercise during right heart catheterisation

RestExerciseMean differencep-valueMedian ratio of peak exercise: resting measurements
Pulmonary artery systolic pressure (mmHg)81±17126±2944±20.7<0.0011.49
Pulmonary artery diastolic pressure (mmHg)30±1142±813±7.2<0.0011.39
mPAP (mmHg)50±1277±1327±10.4<0.0011.58
PAWP (mmHg)5.8±29.3±33.1±2.30.0011.5
Cardiac output (L·min−1)3.9±1.16.3±2.52.4±1.8<0.0011.53
PVR (wood units)11.4±5.511.6±4.40.55±2.60.48
Heart rate (beats·min−1)79±15124±1745±17.9<0.0011.63
Stroke volume (mL)52±1956±262.1±10.10.451.00
SpO2 (%)94±3.689±8.2−5.0±7.10.03
SvO2 (%)62±823±6.8−38.3±6.5<0.001
Venous PO2 (kPa)4.3±0.42.4±0.3−1.9±0.4<0.001

Data are presented as mean±sd, unless otherwise stated. mPAP: mean pulmonary artery pressure; PAWP: pulmonary artery wedge pressure; PVR: pulmonary vascular resistance; SpO2: oxygen saturation measured by pulse oximetry; SvO2: mixed venous saturations, PO2: partial pressure of oxygen.