Circulation:慢性血栓栓塞性肺动脉高压的微血管病变

2020-02-10 QQY MedSci原创

肺动脉内膜切除术(Pulmonary endarterectomy, PEA)是可手术的慢性血栓栓塞性肺动脉高压患者的金标准治疗方法。但PEA术后的持续性肺动脉高压(PH)仍然是预后不良的主要决定因素。除了大肺动脉阻塞外,还有一种伴随的小血管动脉病变被认为在PEA后持续性PH的发展和患者的生存中起着重要的作用。在目前的术前评估中,尚不能很好的评估小血管动脉病变的存在和严重程度。在本研究中,研究人员

肺动脉内膜切除术(Pulmonary endarterectomy, PEA)是可手术的慢性血栓栓塞性肺动脉高压患者的金标准治疗方法。但PEA术后的持续性肺动脉高压(PH)仍然是预后不良的主要决定因素。除了大肺动脉阻塞外,还有一种伴随的小血管动脉病变被认为在PEA后持续性PH的发展和患者的生存中起着重要的作用。在目前的术前评估中,尚不能很好的评估小血管动脉病变的存在和严重程度。在本研究中,研究人员拟利用肺动脉闭塞术来评估慢性血栓栓塞性肺动脉高压患者的小血管疾病的存在和程度,以在术前评估预后结果。

根据肺动脉阻塞波形对毛细管有效压力的估计,研究人员将90例PEA术前患者的肺血管阻力划分为大动脉阻力(上游阻力[Rup])和小动脉和静脉阻力(下游阻力)。为了进行验证,在49例PEA术中,从非阻塞和阻塞的肺区分别进行了肺组织活检。对每个样本的所有血管进行测量。相对于血管外径计算血管中膜占比(%MT,动脉)和内膜厚度(%IT,动脉、静脉和无名血管)。

Rup降低是持续性PH(每10%的优势比:0.40[95% CI, 0.23–0.69]; P=0.001)和存活预后(每10%的风险比:0.03 [95% CI, 0.00–0.33]; p=0.004)的独立预测因子。持续PH患者和非幸存者的非阻塞肺区域的动脉%MT和%IT及阻塞肺区域的静脉%IT显著增加。Rup与非阻塞肺区域的动脉%MT与%IT和阻塞肺区域的静脉%IT逆相关。此外,研究人员还发现Rup<66%可预测PEA术后的持续PH值,而Rup<60%可鉴别PEA术后预后不良的患者。

本研究表明,应用Rup进行肺动脉闭塞波形分析是评价慢性血栓性肺动脉高压患者并发小血管病变程度和术后预后的一项有价值的技术。

原始出处:

Christian Gerges, et al.Microvascular Disease in Chronic Thromboembolic Pulmonary Hypertension.Circulation. 2020;141:376–386

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    2020-02-12 mgqwxj
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    2020-02-11 明天jing

    肺动脉高压表面是罕见病,事实上临床上并不少见,治疗药物虽然有一些,但是整体仍然不理解,可能未来需要采用综合治疗措施。

    0

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