机构地区:[1]上海交通大学医学院附属仁济医院心血管内科,200127 [2] 上海交通大学医学院附属瑞金医院风湿科
出 处:《中华心血管病杂志》2015年第12期1061-1067,共7页Chinese Journal of Cardiology
基 金:国家自然科学基金(81570040)
摘 要:目的 应用血管内超声(IVUS)评估结缔组织病相关性肺动脉高压(PAH-CTD)患者的肺血管性能的改变,研究其与血液动力学之间的关系,并评估PAH-CTD患者的病死率.方法 本研究为前瞻性研究.连续纳入于2011年7月至2014年3月上海交通大学医学院附属仁济医院就诊的高度可疑PAH-CTD患者51例.行右心导管(RHC)和IVUS检查后分成3组,即PAH-CTD组(n=25),其他类型PAH组(n=15)和对照组(n=11).并根据IVUS将PAH患者(PAH-CTD组和其他类型PAH组患者)分为近端重塑型(n=18)和远端重塑型(n=22).应用IVUS共检测408个肺动脉节段,进行统计学分析,评估比较各组患者间肺血管性能以及病死率.结果 IVUS结果显示,PAH-CTD组和其他类型PAH组患者平均管壁厚度(MWT)和管壁厚度百分比(WTP)均明显高于对照组[分别为(0.30±0.02) mm和(0.33 ±0.02) mm比(0.21 ±0.02) mm,和(13.62±0.59)%和(14.39±0.77)%比(9.57±0.97)%,P均<0.01].PAH-CTD组和其他类型PAH组患者肺血管机械性能均较对照组差,表现为顺应性较低[(8.85 ±0.82)×101 mm2/mmHg(1 mmHg =0.133 kPa)和(6.28±0.65)×10-2mm2/mmHg比(41.59 ±5.02)×10-2 mm2/mmHg,P均<0.01],扩张度较低[(0.83±0.09) %/mmHg和(0.55 ±0.06) %/mmHg比(3.16-0.38) %/mmHg,P均<0.01],弹性模量较高[(169.25±15.10) mmHg和(253.00±22.11) mmHg比(43.78±4.27) mmHg,P均<0.01],和僵硬指数β较高(4.19±0.41和5.18±0.34比2.39±0.27,P分别<0.05和0.01).肺血管机械性能和血液动力学之间存在显著幂相关,R2在0.544 ~0.777(P<0.001).PAH-CTD组与其他类型PAH组患者相比肺血管机械性能较好,弹性模量较低[(169.25±15.10) mmHg比(253.00±22.11) mmHg,P<0.01].PAH-CTD组患者与其他类型PAH组患者间的生存曲线未见差异,但PAH患者中远端重塑型患者病死率较近端重塑型患者高(23%比0),风险比为10.14,P<0.05.结论 IVUS�Objective To investigate the value of intravascular ultrasound (IVUS) on assessing pulmonary vascular properties (PVPs) and its relationship with hemodynamics,and mortality rate in patients with pulmonary arterial hypertension associated with connective tissue disease (PAH-CTD).Methods Patients (n =51) with highly suspected PAH-CTD were prospectively enrolled in our department between July 2011 and March 2014.All patients underwent right heart catheterization (RHC) and IVUS,and were divided into 3 groups:PAH-CTD (n =25),PAH due to other reasons (n =15),and non-PAH control group (n=11).Based on IVUS,PAH patients were divided into distal (n =22) and proximal (n =18) remodeling subtypes.A total of 408 pulmonary segments were detected by IVUS,and all patients were followed up to (19 ± 10) months.Results IVUS evidenced higher mean wall thickness (MWT) ((0.30 ± 0.02) mm and (0.33 ± 0.02) mm vs.(0.21 ± 0.02) rmm) and percentage of MWT (WTP) ((13.62 ± 0.59)% and (14.39 0.77)% vs.(9.57 ±0.97)%) values in PAH patients compared to control patients (all P 〈 0.01).Pulmonary vascular mechanical properties (PVMPs) including compliance ((8.85 ± 0.82) × 10 2-mm2/mmHg(1 mmHg =0.133 kPa) and (6.28 ± 0.65) × 10--2 mm2/mmHg vs.(41.59 ± 5.02) × 10-2 mm2-/mmHg,all P 〈 0.01),distensibility ((0.83 ± 0.09)%/mmHg and (0.55 ±0.06)%/mmHg vs.(3.16 ±0.38) %/mmHg,all P 〈0.01),elastic modulus ((169.25 ± 15.10) mmHg and (253.00 ± 22.11) mmHg vs.(43.78 ± 4.27) mmHg,all P 〈 0.01) and stiffness index 3 (4.19 ±0.41 and 5.18 ±0.34 vs.2.39 ±0.27,P 〈0.05 or 0.01) in PAH groups were all significantly worse than in control group (all P 〈0.01).An inverse exponential association was found between PVMPs and hemodynamics with R2 ranging from 0.544 to 0.777 (P 〈0.001).PVMPs tended to be better in group PAH-CTD than in PAH group due to other reasons.Mortality rate was sim
分 类 号:R544.1[医药卫生—心血管疾病]
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