Table 5– Mean values of main cardiovascular parameters and oxygen transport
SB versus Li-NPPVSB versus Hi-NPPVLi-NPPV versus
SAP mmHg126±22118±20112±21<0.05<0.01ns
DAP mmHg71±7.769±7.870±8.2nsnsns
MAP mmHg91±1187±1285±12ns<0.05ns
fC beats·min−182±1581±1582±14nsnsns
SV mL70±19.759±16.551±16.4<0.001<0.001<0.001
CO L·min−15.5±1.144.7±0.984.0±0.96<0.001<0.001<0.001
CO %#100±0.084.4±6.572.5±7.6<0.001<0.001<0.001
SO2 % baseline92.6±1.991.7±4.593.4±4.5nsnsns
DO2 mL·min−1894±176740±150656±166<0.001<0.001<0.01
DO2/m2 mL·min−1·m−2577±110462±93409±104<0.001<0.001<0.01
  • Data are presented as mean±sd, unless otherwise stated. SB: spontaneous breathing; Li: low-intensity; NPPV: noninvasive positive pressure ventilation; Hi: high-intensity; SAP: systolic arterial pressure; DAP: diastolic arterial pressure; MAP: mean arterial pressure; fC: cardiac frequency; SV: stroke volume; CO: cardiac output. CI: cardiac index; SO2: oxygen saturation; DO2: oxygen delivery capacity; DO2/m2: DO2 corrected for body surface area; ns: nonsignificant.