呼气末正压通气(PEEP)使右室后负荷增大而影响右室功能,但却使肺的功能容积增加和改善肺血氧摄取等,所以对病人有益。不过PEEF对肺微循环的starling阻抗效应以及升高胸膜压常使右室前负荷减低,后负荷上升,而右室容积却有赖其前后负荷,从而在PEEF时往往对其功能产生影响。右室的射血直接与其后负荷相关,而PEEP时 Positive end expiratory pressure (PEEP) to increase the right ventricular afterload affects right ventricular function, but it makes the functional volume of the lungs and improve pulmonary oxygen uptake, so the patient benefit. However, PEEF pulmonary micro-circulation of the starling impedance effect and increased pleural pressure often reduce the right ventricular preload, after the load increases, but depends on the right ventricular volume before and after the load, which in PEEF often have an impact on their function. Right ventricular ejection was directly related to the subsequent load, while PEEP