阴道神经刺激显著改善了老鼠慢性心力衰竭后的长期存活率
Meihua Li1, Can Zheng, Takayuki Sato
1Department of Cardiovascular Dynamics, Cardiovascular Center Research Institute, Suita, Japan.
Circulation
|December 10, 2003
概括
阴道神经刺激显著改善了慢性心力衰竭 (CHF) 后心肌梗塞的老鼠的生存率. 这种疗法可以防止心脏重塑和输送失败,将死亡风险降低73%.
科学领域:
- 心血管研究研究心血管研究
- 医疗器械技术 医疗器械技术
- 再生医学是一种再生医学.
背景情况:
- 减少心活动和心率升高与慢性心力衰竭 (CHF) 患者的心肌梗塞后的高死亡率有关.
- 研究改善心肌梗塞后CHF结果的干预措施对于降低患者死亡率至关重要.
研究的目的:
- 评估慢性电动神经刺激对心脏重塑和慢性心血管衰竭老鼠模型中的长期存活率的影响.
- 为了确定阴道神经刺激是否可以减轻心脏不良变化并改善心肌梗塞后的预后.
主要方法:
- 幸存的老鼠患有CHF,由左冠状动脉结合诱导,被随机分为阴道刺激和假控制组.
- 一个植入式设备为右神经提供了6周的电刺激,调整强度以减少心率20-30次/分钟.
- 评估了心脏功能,重塑 (双心脏重量) 和140天生存率.
主要成果:
- 阴道刺激显著降低了左心室末端透析压力,并增加了最大阳性dP/dt,表明心脏功能得到改善.
- 被治疗的老鼠表现出明显较低的正常化双心室体重,这表明心脏重塑减少.
- 阴道刺激显著改善了140天的生存率 (86%对50%),并实现了73%的相对死亡风险降低.
结论:
- 慢性阴道神经刺激有效地改善了老鼠模型的慢性心力衰竭后心肌梗塞的长期生存.
- 观察到的生存益处归因于预防不良的心脏重塑和动失败.
- 阴道神经刺激是治疗慢性心力衰竭的一个有希望的治疗策略.
相关概念视频
01:26Heart Failure Drugs: Inotropic Agents
2.0K
Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...
2.0K
01:26Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
1.9K
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
1.9K
01:29Heart Failure II: Pathophysiology
1.9K
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
1.9K
01:30Cardiomyopathy II: Dilated Cardiomyopathy
790
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
790