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Pcv (mmHg), Ppa (mmHg), Ppw (mmHg), CI (l.min-1.m-2) in both groups. † P <0.05 within the CPAP group, ‡ P <0.05 within the extended sigh group, * P <0.05 between both groups. CPAP=continuous positive airway pressure, Pcv=central venous pressure, Ppa=pulmonary arterial pressure, Ppw=pulmonary wedge pressure, CI=cardiac index
