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本文对21例慢性肺心病患者以双氧水作心脏声学造影测定臂心循环时间及右室贮留时间以检查右心功能状态.在无右心衰竭的6例中臂心循环时间5.9±1.0秒及右室贮留时间174.7±43.6秒与正常组(二者分别为5.0±2.6秒及115.9±30.1秒)无明显差异.而在有右心衰竭者15例中则分别为10.1±3.7秒及272.8±99.8秒均比无右心衰者明显延长(p<0.01～0.05);提示慢性肺心病患者在代偿期,心脏能很好地克服肺循环阻力,心搏量可正常.但随着病情的发展,肺循环阻力逐渐增加,尤在急性呼吸道感染时,因缺氧及CO_2潴留,肺小动脉收缩,肺动脉压力可进一步升高,当超过右心负荷时,即呈失代偿,发生心力衰竭,臂心循环时间及右心贮留时间均延长.
In this paper, 21 patients with chronic cor pulmonale were treated with hydrogen peroxide for cardiothoracic contrast time and right ventricular retention time to check the right ventricular function.Heart circulation was 5.9 ± 1.0 seconds in 6 cases without right heart failure and The right ventricular retention time was 174.7 ± 43.6 seconds and the normal group (both 5.0 ± 2.6 seconds and 115.9 ± 30.1 seconds) no significant difference in 15 cases of right heart failure were 10.1 ± 3.7 seconds and 272.8 ± 99.8 seconds were significantly longer than those without right heart failure (p <0.01 ~ 0.05); prompted patients with chronic pulmonary heart disease in compensatory phase, the heart can well overcome pulmonary resistance, the amount of stroke can be normal, but with the disease Development, pulmonary resistance gradually increased, especially in acute respiratory infections, due to hypoxia and CO_2 retention, pulmonary arterioles contraction, pulmonary artery pressure can be further increased, when the right heart load, that was decompensated, heart failure, Arm heart cycle time and right heart retention time are extended.