透静振动可以改善心功能,在不完全放松的情况下
1First Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan.
Circulation
|December 1, 1992
概括
舒张振动改善了左心室 (LV) 放松和缩功能在狗. 这种机械干扰增强了中风体积和峰值LV压力,表明了扩张功能障碍的潜在治疗方法.
科学领域:
- 心血管生理学心血管生理学
- 生物医学工程 生物医学工程
- 心脏机械学 心脏机械学
背景情况:
- 不完全的左心室 (LV) 放松会损害LV填充,对缩功能的影响尚不清楚.
- 研究改善心脏功能的方法对于改善心脏性能至关重要.
研究的目的:
- 评估透静振动是否可以改善LV放松.
- 为了确定增强放松对LV缩功能的影响.
主要方法:
- 使用了10个开放胸部的狗模型,诱导了不完全的LV放松.
- 在透析期间向LV表面施加振荡性机械扰动 (透析振动).
- 在各种条件下测量LV压力,冲击体积和放松参数.
主要成果:
- 扩张振动降低了 LV 压力下降的时间常数 (T),表明加速放松.
- 在节奏低心率中,振动增加了LV峰值缩压和中风体积.
- 通过弗兰克-斯塔林机制,增强的放松与改善的缩功能相关.
结论:
- 扩张振动有效地加快了LV放松率.
- 改善的扩张性放松增强了收缩功能,这表明了潜在的治疗策略.
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