Effect of noninvasive mechanical ventilation on cardiac function after the heart surgery

Objective To investigate the effects of noninvasive mechanical ventilation on hemodynamics after heart surgery.Methods Noninvasive mechanical ventilation was performed in 48 patients underwent cardiosurgery with respiratory insufficiency after extubation.The pulsed oxygen saturation(SpO2),oxygenation index(OI),mean arterial pressure(MAP),heart rate(HR),central venous pressure(CVP),cardiac index(CI),right ventricular ejection fraction(RVEF),right ventricular end-diastolic volume(RVEDV),mean pulmonary artery pressure(MPAP) and pulmonary vascular resistance index(PVRI) were recorded after extubation(T0),at 30 min(T1),60 min(T2),120 min(T3) and 240 min(T4) during noninvasive mechanical ventilation.Results Compared with T0,there were no remarkable changes of HR,MAP,CVP and RVEDV at T1,T2,T3 and T4(P0.05),but CI and RVEF were highly increased at T3 and T4(P0.05),MPAP was decreased at T4(P0.05),PVRI was decreased at T3 and T4(P0.05),and SpO2 and OI were highly increased at T2,T3 and T4(P0.05).Conclusion The noninvasive mechanical ventilation can effectively improve cardiac function in the patients underwent heartsurgery with respiratory insufficiency after extubation.