在患有内动脉缩狭窄症的患者中,对活动站立的心血管反应
Cerebrovascular diseases (Basel, Switzerland)
|December 4, 2025
概括
患有内动脉硬性狭窄症 (ICAS) 的患者表现出对站立的脑血流 (CBF) 反应. 这种受损的CBF调节部分由心率变化降低 (HRV) 介导,这表明心脑连接.
科学领域:
- 神经学 神经学
- 心脏病学 心脏病学
- 血管医学 血管医学
背景情况:
- 内动脉样硬化症 (ICAS) 影响大脑血液流动 (CBF) 的动态.
- 活动站立模拟血压的快速波动,揭示生理反应.
- 在ICAS中,研究CBF和心率 (HR) 之间的相互作用至关重要.
研究的目的:
- 检查ICAS患者在活动站立期间CBF和HR的动态变化.
- 评估CBF和HR响应与狭窄相关的相互连接.
- 探索心率变化 (HRV) 在调解这些反应中的作用.
主要方法:
- 在一个潜在的队列中进行横截面分析.
- 在182名受试者中,对302条中脑动脉进行了跨骨多普勒监测.
- 比较CBF速度和HR趋势在横卧到活动站立的过渡.
主要成果:
- CBF速度呈现下降,然后在站立时反弹;在狭窄动脉中,反弹时间延长.
- 患有ICAS的患者表现出较低的HR最大范围和较低HRV的趋势.
- HRV部分介导了狭窄对延长CBF速度反弹时间 (12.76%介导) 的影响.
结论:
- 狭窄动脉中的大脑血流显示出对血压波动的反应.
- 降低HRV可能导致ICAS中CBF调节受损.
- 心率监测可能有助于管理ICAS相关的大脑低输血.
相关概念视频
Atherosclerosis II: Clinical Manifestations and Diagnostic Tests
440
Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
440
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
326
Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
326
Peripheral Artery Disease III: Interprofessional Care
226
Peripheral Artery Disease (PAD) is characterized by narrowed arteries that diminish blood flow to the extremities. Effective management of PAD requires an interprofessional approach involving various healthcare professionals. The critical aspects of interprofessional care for PAD patients focus on risk factor modification, drug therapy, exercise therapy, nutrition therapy, critical limb ischemia care, and interventional radiology and surgical procedures.The primary treatment goal for PAD...
226
Peripheral Artery Disease I: Introduction
290
Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
290


