减弱的外周血管反应有助于巴罗反射功能障碍的患者与野生类型的 transthyretin Amyloidosis (wtATTR)
Jarred J Iacovelli1, Jeremy K Alpenglow2,3, Jill Stratford Waldron4
1Department of Nutrition and Integrative Physiology, University of Utah, SLC, UT.
American journal of physiology. Heart and circulatory physiology
|January 30, 2026
概括
野生类型的跨氨基粉症 (wtATTR) 患者表现出对下体负压的外周血管反应受损,表明自主功能障碍. 这种自主功能障碍在wtATTR中比心力衰竭与保留射出分数 (HFpEF) 更明显.
科学领域:
- 心血管生理学心血管生理学
- 自主神经系统的自主神经系统
- 腎臟病學 (nephrology) 是一種醫學.
背景情况:
- 自主功能障碍是野生类型的过氨氨基化症 (wtATTR) 的常见临床特征.
- 对于血压调节至关重要的巴罗反射功能,可以在wtATTR.中改变.
- 将wtATTR自主反应与其他疾病 (如心力衰竭与保留射出分数 (HFpEF)) 进行比较是很重要的.
研究的目的:
- 为了测试与HFpEF对照组相比,wtATTR患者的下体负压 (LBNP) 诱导的低血压是否减弱了中央和外围的血液动力学反应.
- 在wtATTR中使用渐进的LBNP阶段来评估心肺和综合巴罗反射功能.
- 为了调查在wtATTR.在静止期间对血压失调的潜在贡献.
主要方法:
- 渐进的下体负压 (LBNP) 应用于患有wtATTR (n=13) 和HFpEF对照 (n=13) 的患者,在 -10, -20, -30 和 -40 mmHg 的阶段.
- 通过心率 (HR) 和中风体积 (SV) 的变化来评估中心心脏反应.
- 通过前臂血流 (FBF) 和血管导电率 (FVC) 的变化来评估周围血管反应,并监测平均动脉压 (MAP).
主要成果:
- 在LBNP诱导的HR或SV变化中没有观察到显著的群体差异.
- 血管收缩,以FVC测量,与对照人群相比,在高LBNP水平 (-30和-40 mmHg) 的wtATTR患者中显著降低.
- 与对照组不同的是,wtATTR组的平均动脉压 (MAP) 在-40 mmHg LBNP下降,与对照组不同.
结论:
- 患有wtATTR的患者表现出对LBNP诱导的低血压减弱的周围血管反应.
- 这些发现表明,wtATTR中整合性巴罗反射功能的障碍超出了非粉素HFpEF中观察到的障碍.
- 在wtATTR中巴罗反射功能受损可能导致静态血压失调.
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