Chronic thromboembolic pulmonary hypertension (CTEPH) comprises organizing thrombotic obstructions in the pulmonary arteries by nonresolving thromboemboli, formation of fibrosis and remodeling of pulmonary blood vesse...Chronic thromboembolic pulmonary hypertension (CTEPH) comprises organizing thrombotic obstructions in the pulmonary arteries by nonresolving thromboemboli, formation of fibrosis and remodeling of pulmonary blood vessels. Surgical pulmonary endarterectomy (PEA) is the therapy of choice for patients with surgically accessible CTEPH, which leads to a profound improvement in hemodynamics, functional class and survival. Select- ing the candidates that will benefit from surgery is still a challenging task. Criteria for surgical suitability have been described but the decision-making for or against surgical intervention remains still subjective. The optimal characterization of the reciprocal contribution of large vessel and small vessel disease in the elevation of pulmonary vascular resistance is crucial for the indication and outcome of PEA. Recently, Toshner et al intended to validate the partition resistance into small and large vessels compartments (upstream resistance:Rup) by the occlusion technique in the preoperative assessment of PEA. We discuss the advantages and disadvantages of Rup and compare it with other hemodynamic predictor to evaluate operative risk in CTEPH patients.展开更多
目的 探讨法洛四联症（TOF）矫治术后中远期肺动脉压力及阻力升高机制.方法 2009年1月至2011年4月我院行法洛四联症矫治术共181例.随访2～5年,对怀疑患肺动脉高压者行右心导管检查,最终确诊19例.分析单纯TOF矫治术后产生肺动脉高压的因...目的 探讨法洛四联症（TOF）矫治术后中远期肺动脉压力及阻力升高机制.方法 2009年1月至2011年4月我院行法洛四联症矫治术共181例.随访2～5年,对怀疑患肺动脉高压者行右心导管检查,最终确诊19例.分析单纯TOF矫治术后产生肺动脉高压的因素.结果 19例患者在随访的2～5年内绝大多数未出现明显临床症状.WHO心功能评定Ⅰ/Ⅱ级17例、Ⅲ/Ⅳ级2例.问卷调查Bog呼吸困难评分为1～7分,中位数为4分.BNP检查为11～＞5000 pg/ml,BNP的中位数为266 pg/ml.右心导管检查示不同程度的肺动脉压力和阻力升高,其中轻度肺动脉高压16例,占绝大多数.肺小动脉楔入压均正常（6～10 mm Hg）,肺动脉-右心室连续测压压力阶差＜10 mm Hg,右房压力属正常范围（6～11 mm Hg）.部分患者同时行肺小动脉造影,没有发现肺动脉高压特征性改变,无急性肺血管扩张试验阳性者.结论 法洛四联症矫治术后患者中远期会出现肺动脉高压及全肺阻力升高.其机制目前并不十分确定清楚,可能是一个多因素交叉的复杂过程.展开更多
文摘Chronic thromboembolic pulmonary hypertension (CTEPH) comprises organizing thrombotic obstructions in the pulmonary arteries by nonresolving thromboemboli, formation of fibrosis and remodeling of pulmonary blood vessels. Surgical pulmonary endarterectomy (PEA) is the therapy of choice for patients with surgically accessible CTEPH, which leads to a profound improvement in hemodynamics, functional class and survival. Select- ing the candidates that will benefit from surgery is still a challenging task. Criteria for surgical suitability have been described but the decision-making for or against surgical intervention remains still subjective. The optimal characterization of the reciprocal contribution of large vessel and small vessel disease in the elevation of pulmonary vascular resistance is crucial for the indication and outcome of PEA. Recently, Toshner et al intended to validate the partition resistance into small and large vessels compartments (upstream resistance:Rup) by the occlusion technique in the preoperative assessment of PEA. We discuss the advantages and disadvantages of Rup and compare it with other hemodynamic predictor to evaluate operative risk in CTEPH patients.
文摘目的 探讨法洛四联症（TOF）矫治术后中远期肺动脉压力及阻力升高机制.方法 2009年1月至2011年4月我院行法洛四联症矫治术共181例.随访2～5年,对怀疑患肺动脉高压者行右心导管检查,最终确诊19例.分析单纯TOF矫治术后产生肺动脉高压的因素.结果 19例患者在随访的2～5年内绝大多数未出现明显临床症状.WHO心功能评定Ⅰ/Ⅱ级17例、Ⅲ/Ⅳ级2例.问卷调查Bog呼吸困难评分为1～7分,中位数为4分.BNP检查为11～＞5000 pg/ml,BNP的中位数为266 pg/ml.右心导管检查示不同程度的肺动脉压力和阻力升高,其中轻度肺动脉高压16例,占绝大多数.肺小动脉楔入压均正常（6～10 mm Hg）,肺动脉-右心室连续测压压力阶差＜10 mm Hg,右房压力属正常范围（6～11 mm Hg）.部分患者同时行肺小动脉造影,没有发现肺动脉高压特征性改变,无急性肺血管扩张试验阳性者.结论 法洛四联症矫治术后患者中远期会出现肺动脉高压及全肺阻力升高.其机制目前并不十分确定清楚,可能是一个多因素交叉的复杂过程.
