主动脉缩窄治疗后的长期结果和血管评估 (LOVE-COARCT)
LOVE-COARCT 研究:主动脉缩窄治疗后的长期结果和血管评估
研究概览
详细说明
研究概述。 这项横断面前瞻性观察研究对先前使用三种治疗方式之一治疗的 CoA 患者进行了评估,评估治疗类型是否与血管功能差异相关。 三个治疗组将针对关键混杂变量进行频率匹配。
研究可行性。 研究人员组建了一个多学科团队,他们在流行病学、临床试验设计、先天性心脏病、无创成像、介入心脏病学、血管功能评估、预防心脏病学和统计分析方面拥有成熟的专业知识。 多中心设计用于确保在评估假设时有足够的统计功效。
参与中心和研究核心实验室。 患者在来自葡萄牙和美国的六个大型儿科心脏中心招募。
筛选程序。 当地研究调查员使用预先指定的筛选表筛选可能符合条件的患者的医疗记录,以确保他们满足我们的选择标准。
研究工作流程概述。 研究程序将在一天或两天的访问中进行。 抵达进行测试后,将获得正式的参与同意书。 将在禁食时评估动脉硬度、内皮功能和生物标志物的血液采样。 心肺压力测试将在同一天进行。 CMR 和动态血压监测 (ABMP) 将在同一天或第二天安排。 当第一次访问无法完成研究测试时,将在第一次访问后的 3 个月内完成。 研究方案得到了每个参与中心的机构审查委员会或机构伦理委员会的批准,并且在试验登记之前,将根据年龄从患者及其父母/法定监护人那里获得知情同意和同意。
招聘。 将对每个参与机构的患者数据库进行审查,以收集一组先前接受过球囊扩张、手术或支架置入术治疗的 CoA 患者。 将使用波士顿儿童医院托管的 REDCap 电子数据采集工具收集和管理研究数据。
数据采集。 将进行回顾性图表审查以收集人口统计和临床数据,包括缩窄的严重程度、CoA 治疗的类型和细节以及相关病症的存在。
诊断程序。
动脉硬化计划和基本原理:
测量:颈动脉-股动脉 PWV (cfPWV) 将使用压平眼压测量法进行测量。 使用 CMR 测量节段性 PWV。 将使用 CMR 测量动脉扩张性的分段测量。 其他描述动脉硬度的参数反映了动脉直径变化与压力变化之间的关系,包括主动脉应变(直径的相对变化)、顺应性(直径随压力变化的绝对变化)、扩张性(直径的相对变化)响应于压力的变化)和主动脉硬度 β 指数(使用相对压力的对数转换的扩张性)。 压平眼压计使用探头或眼压计通过换能器记录脉搏波,是最广泛接受的估计 PWV 的方法,NIHem(心血管工程公司,美国马萨诸塞州诺伍德)和 SphygmoCor(AtCor Medical, West Ryde, NSW, Australia)设备已在大型队列试验中得到验证。 将根据当地可用性使用这两种设备。
内皮功能测量:将使用 EndoPAT 2000 系统(Itamar Medical,Caesarea,Israel)测量内皮依赖性反应性充血指数和增强指数。 该协议包括尽量减少自主神经系统影响的措施。
脉搏波形分析:中心主动脉压和脉压将使用压平眼压测量法测量)。 将使用压平眼压计和 Endo-PAT 测量增强指数。 CAP、PP 和 AIx 可以使用桡动脉或颈动脉压平眼压计(以及用于 AIx 的 Endo-PAT)进行无创测量,并通过外周舒张压和平均动脉压进行校准。 使用了 NIHem 系统和 SphygmoCor 设备。
将使用常规标准技术测量血压表型,包括听诊右臂血压测量、手臂和腿部血压梯度测量、跑步机运动压力测试 (ET) 和 ABPM 期间的血压反应。 根据听诊 BP 和 ABPM 结果,将使用适当的儿童和成人指南对患者进行分类。 目前服用抗高血压药物的患者将被归类为高血压患者。
生物标志物:研究人员将测量内皮功能(总氮氧化物 - NOx 和 ADMA)、炎症(hs-CRP)、血管壁功能(VCAM-1 和 IL-1β)和血管重塑(MMP-2;MMP- 9 和 TGF-β1)。 NOx 将通过化学发光 (Sievers NOAnalyzer 280i) 测定,所有剩余测量将使用适当的酶联免疫吸附测定 (ELISA) 试剂盒进行:ADMA(Sunred Biological Technology, Shanghai, China); hs-CRP(BoosterBio,普莱森顿,美国); VCAM-1; IL-1β;基质金属蛋白酶-9; MMP-2 和 TGFβ-1(RayBiotech, Inc. 美国诺克罗斯)。
通过 CMR 评估左心室质量。 CoA 治疗后持续存在的改变的血压表型代表导致 LV 肥大的后负荷增加。 我们的 CMR 协议将包括允许这种量化的序列。
心血管健康评估:研究人员将评估健康因素(血压、总胆固醇、血浆葡萄糖)、行为(吸烟、身体质量指数 BMI、体力活动和饮食)以及心血管疾病和危险因素的家族史。 根据美国心脏协会的程序和建议,实施问卷调查以评估 CV 疾病和 ICVH 的家族史。
统计考虑。 治疗组将针对记录的混杂因素进行频率匹配。 混杂变量将包括: (a) 接受治疗的年龄; (b) 当前年龄; (c) 二尖瓣主动脉瓣,因为它与主动脉弹性受损有关。 由于匹配变量和三个治疗组相对较多,匹配个别受试者是不可行的。 在分析过程中,治疗组将针对这些混杂变量中的每一个进行比较,并在需要时进行适当的调整。 将使用 Fisher 对缩窄严重程度的精确检验和 Kruskal-Wallis 检验对治疗年龄、当前年龄和二尖瓣主动脉瓣进行评估,以评估三个治疗组之间混杂变量的差异。 主要结果变量将是通过眼压计评估的颈动脉 - 股动脉 PWV。 将使用单向方差分析探索各组间 cfPVW 的差异。 如果在组间检测到匹配变量的差异,将使用协方差分析进行调整。 必要时将进行事后分析。
样本大小估计是根据先前的数据获得的,这些数据表明通过 CMR 测量的升序-降序 PWV 为 3.3±0.6 正常受试者为 m/s,CoA 手术后为 4.7±1.1 m/sec。22, 70 用于比较三个同等规模治疗组之间 PVW 的样本量估计(假设总体显着性水平 = 0.05 且功效 = 0.8) 显示在表 2 中。研究人员计划在每组中招募 24 至 30 名患者,总样本量为 72 至 90。
研究类型
注册 (预期的)
联系人和位置
学习地点
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Lisboa、葡萄牙、1169-024
- 招聘中
- Department of Pediatric Cardiology, Hospital de Santa Marta, Centro Hospitalar de Lisboa Central
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接触:
- José D Martins, MD MSc
- 电话号码:+351918338690
- 邮箱:jose.martins@chlc.min-saude.pt
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
取样方法
研究人群
描述
纳入标准:
- 主动脉峡部缩窄的诊断;
- 当前年龄介于 8 岁(允许配合研究程序)和 35 岁(以避免因衰老相关的血管功能障碍而混淆);和
- 1994 年之后 CoA 的治疗,此后三种方式均投入临床使用。
排除标准:
- 由上肢至下肢收缩压梯度> 20mmHg 定义的残余 CoA;
- 可能独立影响血管功能的合并症,包括相关的显着先天性心脏病、已知血管病史、遗传综合征或其他心血管危险因素;
- CoA 两种治疗类型的历史;和
- CoA 类型可能代表不同实体或适合一种单一治疗类型(手术)的患者,包括非典型 CoA 部位(如中胸或腹部)、主动脉弓严重发育不全和治疗年龄 <1 岁.
学习计划
研究是如何设计的?
设计细节
队列和干预
团体/队列 |
干预/治疗 |
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外科手术
主动脉缩窄的主要端到端手术治疗
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主动脉缩窄的主要端到端手术治疗
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球囊扩张
主动脉缩窄一期球囊扩张治疗
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主动脉缩窄一期球囊扩张治疗
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支架
主动脉缩窄的初始支架扩张治疗
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主动脉缩窄的初始支架扩张治疗
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研究衡量的是什么?
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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血管功能
大体时间:初步治疗后 6 个月至 35 年
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通过眼压计通过颈动脉 - 股动脉 PWV 测量评估动脉硬度
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初步治疗后 6 个月至 35 年
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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心脏磁共振功能指标
大体时间:初步治疗后 6 个月至 35 年
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CMR 测量的升-降主动脉 PWV 和主动脉应变、扩张性、顺应性和主动脉刚度 β 指数
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初步治疗后 6 个月至 35 年
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内皮功能
大体时间:初步治疗后 6 个月至 35 年
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通过内皮脉冲振幅测试确定内皮功能
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初步治疗后 6 个月至 35 年
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脉冲波形
大体时间:初步治疗后 6 个月至 35 年
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使用动脉眼压计进行脉搏波形分析
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初步治疗后 6 个月至 35 年
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血压表型
大体时间:初步治疗后 6 个月至 35 年
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静息、动态测量和运动高峰时的血压表型
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初步治疗后 6 个月至 35 年
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左心室质量
大体时间:初步治疗后 6 个月至 35 年
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通过心脏磁共振评估左心室质量
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初步治疗后 6 个月至 35 年
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左心室收缩功能
大体时间:初步治疗后 6 个月至 35 年
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心脏磁共振评估左心室收缩功能
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初步治疗后 6 个月至 35 年
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内皮功能的生物标志物
大体时间:初步治疗后 6 个月至 35 年
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内皮功能的生物标志物(总氮氧化物 - NOx 和 ADMA),
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初步治疗后 6 个月至 35 年
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血管炎症的生物标志物
大体时间:初步治疗后 6 个月至 35 年
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炎症生物标志物(hs-CRP)。
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初步治疗后 6 个月至 35 年
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血管壁功能的生物标志物
大体时间:初步治疗后 6 个月至 35 年
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血管壁功能的生物标志物(VCAM-1 和 IL-1β)
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初步治疗后 6 个月至 35 年
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血管重塑的生物标志物
大体时间:初步治疗后 6 个月至 35 年
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血管重塑的生物标志物(MMP-2;MMP-9 和 TGF-beta1)。
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初步治疗后 6 个月至 35 年
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合作者和调查者
合作者
调查人员
- 首席研究员:José D Martins, MD MSc、Centro Hospitalar de Lisboa Central
- 学习椅:Miguel Mota Carmo, MD PhD、Centro de Estudos de Doenças Crónicas da Faculdade de Ciências Médicas da Universidade Nova de Lisboa
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