血小板聚合能力的早晨增加. 与假设直立姿势的关联
D A Brezinski1, G H Tofler, J E Muller
1Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115.
Circulation
|July 1, 1988
概括
清晨直立姿势显著增加了血小板聚合能力和血类甲醇胺,这可能解释了在此期间心脏病发作和突然心脏病死亡的增加. 这一发现突显了姿势对心血管风险的影响.
科学领域:
- 心血管生理学心血管生理学
- 血液静止和血栓形成
- 时间生物学 时间生物学
背景情况:
- 心肌梗塞和心脏突然死亡的频率在上午6点到中午12点之间达到顶峰.
- 早上增加血小板聚合能力可能会导致这些心血管事件.
- 起床,起床和走动等早晨活动被怀疑是增加血小板活动的触发因素.
研究的目的:
- 为了确定负责增加血小板聚合能力的特定早晨活动.
- 调查姿势和甲基荷兰胺水平在早晨心血管风险中的作用.
主要方法:
- 16名健康受试者参加了一项受控研究.
- 在隔离的早晨活动后测量了血小板聚合:醒来,假设直立姿势和走动.
- 在每次活动之前和每次活动后90分钟收集血液样本.
- 还分析了血中甲基醇胺 (上腺素和上腺素) 度.
主要成果:
- 对腺二酸盐和上腺素的血小板反应性仅在假设直立姿势后显著增加.
- 聚合性在上午9:30到11点之间增加 (直立姿势后90分钟).
- 在假设直立姿势后,血上腺素和上腺素水平显著上升.
结论:
- 早上假设直立姿势是增加血小板聚合能力的关键触发因素.
- 血小板聚合能力的增加与血中甲基胆胺水平的升高有关.
- 这一发现提供了早晨的日常生活和血栓性心血管事件的风险增加之间的机械联系.
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