急性内甲蛋白A受体阻塞导致慢性心力衰竭患者选择性肺血管扩张
M M Givertz1, W S Colucci, T H LeJemtel
1Cardiomyopathy Program and Cardiovascular Section, Boston University Medical Center, Boston University School of Medicine, Boston, MA 02118, USA.
Circulation
|June 28, 2000
概括
西塔克森坦是一种内甲素A受体对抗剂,在心力衰竭患者中有效降低了肺动脉压力和抵抗力. 这种选择性肺血管扩张表明,在治疗慢性心力衰竭的次要肺高血压方面,有潜在的益处.
科学领域:
- 心脏病学 心脏病学
- 药理学 药理学是指药理学的学科.
- 肺高血压是什么意思 肺高血压
背景情况:
- 心力衰竭中内甲素-1 (ET-1) 的升高与肺动脉压力和阻力增加相关.
- 内甲素A (ET(A)) 受体调解肺血管收缩和增大.
- 慢性心力衰竭的传统疗法往往不能完全解决肺血管功能障碍.
研究的目的:
- 评估西塔克森坦的急性血液动力学效应,一种选择性的ET(A) 受体对抗剂.
- 评估sitaxsentan对慢性心力衰竭患者的肺动脉压力和血管抵抗的影响.
- 为了确定西塔克森坦是否能降低该患者群体中血ET-1水平的升高.
主要方法:
- 一个多中心,双盲,安慰剂对照试验,涉及48名NYHAIII/IV类心力衰竭患者.
- 患者接受了静脉注射西塔克森坦 (1.5,3.0或6.0毫克/公斤) 或安慰剂的升级剂量.
- 血液动力学参数通过右心导管检查在输液后6小时进行评估.
主要成果:
- 西塔克森坦显著降低了肺动脉缩压,肺动脉平均压力和肺血管阻力.
- 使用西塔克森坦,观察到右心房压和血ET-1水平显著降低.
- 没有发现对心率,平均动脉压,心脏指数或全身血管阻力有显著影响.
结论:
- 在中度至重度心力衰竭患者中,西塔克森坦诱导选择性肺血管扩张的急性ET(A) 受体阻塞.
- 西塔克森坦的使用导致了血ET-1水平的降低.
- 西塔克森坦在治疗与慢性心力衰竭相关的肺高血压方面表现有前途.
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