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相关概念视频

Conduction System of the Heart01:19

Conduction System of the Heart

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Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
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Electrophysiology of Normal Cardiac Rhythm01:19

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The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

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Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
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Regulation of Heart Rates01:31

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The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
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相关实验视频

Updated: Jun 6, 2025

Translational Rabbit Model of Chronic Cardiac Pacing
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在无心脏起器系统中,基于温度的速率响应.

Mayer Y Rashtian1, James E Ip2, Derek V Exner3

  • 1Huntington Memorial Hospital, Pasadena, California.

Heart rhythm
|November 24, 2024
PubMed
概括
此摘要是机器生成的。

双室无心脏起器系统有效地使用基于温度的传感器来调整运动期间的节奏率. 这种响应速度的节奏与心室和心房器件的代谢需求准确匹配.

关键词:
阿维尔 (Aveir) 是一个这就是CAEPEP的原因.这是一间双室的房间.无心脏起器是一种无心脏起器.响应率 响应率 响应率

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Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
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相关实验视频

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科学领域:

  • 心脏病学 心脏病学
  • 生物医学工程 生物医学工程
  • 医疗器械 医疗器械

背景情况:

  • 一种新的双室无心脏起器 (DR-LP) 系统使用基于温度的速度响应传感器.
  • 对于心室 (VR-LP) 和心房 (AR-LP) 设备的运动过程中速率响应的有效性需要评估.

研究的目的:

  • 为了确定基于温度的速度响应节奏是否与无心脏起器系统中的代谢工作负载成正比.
  • 评估速度调节的有效性,以应对运动诱导的代谢需求.

主要方法:

  • 在LEADLESS II-Phase 2和Aveir DR i2i研究中给参与者使用的跑步机炼方案.
  • 通过使用编程设置优化后步行测试,评估了心室和心房速率-响应传感器.
  • 传感器指定的速度与代谢工作负载的综合规范化斜率;接受范围定义为95%的IC在0.65和1.35之间.

主要成果:

  • 平均心室速率-反应斜率为0.93 (CI,0.78-1.08),符合接受标准 (P = .001).
  • 平均心房速率-响应斜率为0.91 (CI,0.78-1.05),也符合接受标准 (P < .001).

结论:

  • 基于温度的传感器在DR-LP系统有效调节节奏率与增加的代谢需求.
  • 对于心室和心房无节奏器件,节奏率和代谢工作负载之间的比例已被证明.