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相关概念视频

Heart Failure Drugs: Inotropic Agents01:26

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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...
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Introduction to AEDAn Automated External Defibrillator (AED) is a portable medical device that analyzes the heart's rhythm and, if necessary, delivers an electrical shock to help the heart re-establish an effective rhythm during sudden cardiac arrest (SCA). SCA occurs when the heart suddenly and unexpectedly stops beating, leading to a loss of blood flow to the brain and other vital organs. In such emergencies, time is of the essence, and using an AED, combined with Cardiopulmonary...
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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,...
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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
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在运动期间使用融合节奏来进行心脏重同步.

Peregrine G Green1,2,3, Cristiana Monteiro2, David A Holdsworth1,3

  • 1Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, UK.

Journal of cardiovascular electrophysiology
|October 27, 2023
PubMed
概括
此摘要是机器生成的。

融合节奏在运动期间保持心脏再同步治疗 (CRT) 的最佳时间. 在休息时优化QRS持续时间可以改善CRT患者的运动性能和心脏效率.

关键词:
运动就是炼身体.融合 融合 融合 融合 融合 融合 融合 融合 融合 融合心脏衰竭是因为心脏衰竭.节奏节奏的节奏是什么重新同步重新同步的时间.

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科学领域:

  • 心脏病学 心脏病学
  • 电子生理学 电子生理学
  • 运动生理学 运动生理学

背景情况:

  • 在心脏再同步疗法 (CRT) 中的融合节奏需要在左心室和右心室激活之间精确的时间.
  • 目前尚不确定,当心房 (AV) 导电波动波动时,运动期间是否保持这种融合节奏.

研究的目的:

  • 在使用心肺运动测试 (CPET) 的CRT患者中,比较融合节奏 (SyncAVTM算法) 与运动期间固定AV延迟 (AVD) 的疗效.

主要方法:

  • 一项双盲,随机,交叉研究,涉及20名CRT患者,PR间隔<250毫秒.
  • 患者接受了两个CPET测试:一个是SyncAVTM,另一个是120毫秒的固定的AVD,另一个编程是针对最窄的QRS持续时间 (QRSd) 进行优化.

主要成果:

  • 融合节奏和固定AVD都导致了类似的静止QRSd缩小.
  • 在两种节奏模式之间,在峰值氧气消耗 (V·O2 PEAK),无氧值 (VT1) 或达到这些指标的时间上没有观察到显著差异.
  • 然而,在休息时实现最窄QRSd的编程导致在运动期间QRSd显著缩小,增加峰值O2脉冲 (中风体积替代物),并提高心脏效率.

结论:

  • 与固定AVD相比,在CRT患者的运动期间保持融合节奏,而不会对运动能力产生负面影响.
  • 优化休息时最窄QRSd的编程对于增强运动QRSd,峰值中风体积和整体心脏效率至关重要.