在心房短心期间表面心电图上的同电间隔的电生理学决定因素:高密度映射的见解
Yosuke Nakatani1, Masateru Takigawa1, F Daniel Ramirez2
1Department of Cardiac Pacing and Electrophysiology, Hôpital Cardiologique du Haut-Lévêque, Centre Hospitalier Universitaire de Bordeaux, Pessac, France; IHU LIRYC-Centre Hospitalier Universitaire Bordeaux, Universitaire Bordeaux, Institut National de la Santé et de la Recherche Médicale U1045, Pessac, France.
减少的心房激活面积和电压预测心房高心率 (ATs) 期间的同电间隔. 较小的激活区域与较慢的导电相关,影响心电图上的AT波形态.
科学领域:
- 电子生理学 电子生理学
- 绘制心脏地图是指绘制心脏地图.
- 信号处理 信号处理
背景情况:
- 基质异常会在心房高心率 (ATs) 期间影响心房激活.
- 这可以改变表面电心图上的AT波形态.
研究的目的:
- 确定在复杂的心房激活模式的AT中异电间隔的决定因素.
- 评估激活心房表面对异电间隔存在的影响.
主要方法:
- 分析了126个AT的高密度激活图.
- 使用信号处理算法 (LUMIPOINT) 测量最小激活面积.
- 定义最小激活面积为50毫秒内最小的激活面积.
主要成果:
- 较小的最小激活区域和较大的非常低电压区域独立预测P波ATs.
- 最低10厘米2的激活面积切线显示出高预测精度 (95-97%).
- 在重新进入的AT中,较小的最小激活面积与较低的传导速度和较少的延迟传导区域相关.
结论:
- 减少心房激活面积和电压与ATs期间的同电间隔有关.
- 这些发现提高了对AT机制和ECG表现的理解.
更多相关视频
06:57Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
Published on: January 31, 2019
10:17Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
Published on: April 11, 2025
相关概念视频
Electrocardiogram Fundamentals
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
Electrocardiogram
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
Cardiac Action Potential
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Electrophysiology of Normal Cardiac Rhythm
Correlation between ECG and Cardiac Cycle
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
