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相关概念视频

Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

892
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
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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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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

885
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
885

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相关实验视频

Updated: Jun 2, 2025

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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特定位置的静脉动心跳的诱导性

Asad A Aboud1, Robert L Abraham2, Oluwaseun Adeola3

  • 1Saint Thomas West Heart Center, Nashville, Tennessee, USA.

JACC. Clinical electrophysiology
|January 17, 2025
PubMed
概括

编程电刺激 (PES) 可能无法从标准部位诱导心室低心率 (VT). 根据患者数据和模拟,在某些患者中,可能需要替代的节奏位置来诱导静脉动,如患者数据和模拟所示.

关键词:
这就是VT的废除.在 VT 模拟中使用 VT 模拟.编程的电刺激.特定地点的诱导.腹腔动脉短心症是什么意思

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相关实验视频

Last Updated: Jun 2, 2025

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科学领域:

  • 心脏电生理学 心脏电生理学
  • 医疗器械技术 医疗器械技术
  • 计算生物学 计算生物学

背景情况:

  • 编程电刺激 (PES) 对于心室动脉冲动 (VT) 移除至关重要.
  • 在PES期间的VT诱导性不一致,失败原因不明.

研究的目的:

  • 通过使用PES来调查与痕相关的VT诱导的节奏部位特定失败.
  • 通过计算机模拟探索 PES 诱导的 VT 失败的机制性解释.

主要方法:

  • 审查了6名从传统右心室 (RV) 部位诱导VT失败但从非传统部位成功诱导的患者.
  • 进行了计算机模拟,以研究PES在重新进入电路周围的各个地点启动重新进入.

主要成果:

  • 鉴定了6名没有从RV顶部/输出通道诱导的持续静脉瘤的患者,但很容易从左心室 (LV),基底静脉瘤或心上部位诱导VT.
  • 在5名患者中,静脉瘤诱导部位更接近重新进入回路.
  • 模拟显示,节奏部位靠近电路地峡,通过影响恢复时间,影响重新进入启动.

结论:

  • PES网站显著影响VT诱导性,标准的RV网站有时无法诱导临床相关的VTs.
  • 替代性节奏部位刺激是被选中的患者可行的策略.
  • 需要进一步的研究来确定这种现象的频率.