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肺动脉高压是左向右分流型先天性心脏病严重并发症,本文对34例左向右分流型先天性心脏病进行了肺小动脉楔状造影,并作定性和定量分析。结果:肺动脉收缩压小于3.99kPa,肺小动脉造影基本正常;当肺动脉收缩压为3.99kPa～6.55kPa 时,肺小动脉分支开始减少,循环时间延长;肺动脉收缩压大于6.65kPa 时,肺总阻力小于7.5Wood 单位,尚有肺组织不完整的毛细血管充盈改变。肺小动脉楔状造影出现囊样扩张的14例,肺总阻力均大于7.5Wood 单位。通过定量分析可见,随肺阻力的增加,右下叶肺后基底动脉缩短,肺小动脉分支减少,股动脉血氧下降,肺循环时间延长。
Pulmonary hypertension is a serious complication of left-to-right shunt congenital heart disease. In this paper, 34 cases of left-right shunt congenital heart disease pulmonary arteriole wedge angiography, and for qualitative and quantitative analysis. Results: Pulmonary artery systolic pressure was less than 3.99kPa, pulmonary arteriola angiography was normal. When pulmonary artery systolic pressure was 3.99kPa ~ 6.55kPa, pulmonary arteriole branches began to decrease and circulation time prolonged. When pulmonary artery systolic blood pressure was higher than 6.65kPa, pulmonary total resistance Less than 7.5 Wood units, there is incomplete pulmonary capillary filling changes. Pulmonary arteriole wedge angiography showed cystoid dilatation in 14 cases, the total lung resistance were greater than 7.5 Wood units. Quantitative analysis shows that with the increase of pulmonary resistance, the posterior basilar artery in the lower right lobe is shortened, the branches of the pulmonary arterioles are reduced, the blood oxygen in the femoral artery is decreased, and the pulmonary circulation time is prolonged.