相关实验视频
Updated: Jun 5, 2026

07:46
Assessing Endothelial Vasodilator Function with the Endo-PAT 2000
Published on: October 15, 2010
在健康人群中,内皮功能早晨衰减
Maria E Otto1, Anna Svatikova, Rodrigo Bellio de Mattos Barretto
1Mayo Foundation, Rochester, Minn 55905, USA.
Circulation
|May 12, 2004
概括
通过流介导血管扩张 (FMD) 测量的内皮功能在健康个体醒来后的早晨显著降低. 这种早晨的内皮功能障碍可能会导致此时观察到的心血管事件的风险增加.
科学领域:
- 心血管生理学心血管生理学
- 循环节律是指循环节律的节奏.
- 脑内皮功能 脑内皮功能
背景情况:
- 心血管事件在早上醒来后的几个小时出现的峰值.
- 这种昼夜变化的潜在机制尚未完全理解.
- 内皮功能障碍是心血管事件的已知危险因素.
研究的目的:
- 为了测试这个假设,内皮功能是早上减少与健康的人在一天中的其他时间相比.
- 为了研究内皮功能与清醒时间相关的昼夜变化.
主要方法:
- 研究了30名健康受试者 (19名男性,11名女性;平均年龄为41.6岁).
- 多睡眠学被用来排除睡眠障碍.
- 支臂动脉流量介导的内皮依赖血管扩张 (FMD) 和内皮独立扩张 (非FMD) 在晚上9点 (睡觉前),早上6点 (醒来后) 和早上11点 (深夜) 测量.
主要成果:
- 流媒体血管扩张 (FMD) 从睡眠前的7.5%显著降低到醒来后的4.4% (P=0.02),在清晨晚些时候恢复到7.7%.
- 内皮独立扩张 (非FMD) 在观察期内没有显著变化.
- 睡眠质量正常,睡眠效率为84+/-2%.
结论:
- 在健康个体中,内皮功能,特别是口炎,在清晨早些时候会变得.
- 这种早晨内皮功能减少可能在观察到的心脏和血管事件的早晨峰值中起作用.
相关概念视频
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Bioavailability Study Design: Healthy Subjects Versus Patients
Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...

