在2D领域的模拟心房动期间,用电图量化频率调制
Juan P Ugarte1, Alejandro Gómez-Echavarría2, Catalina Tobón2
1GIMSC, Universidad de San Buenaventura, Medellin, Colombia.
Computers in biology and medicine
|October 3, 2024
概括
使用分数里叶变换 (FrFT) 的新算法通过分析复杂的电图 (EGM) 信号,帮助确定心房动 (AF) 的原因. 这种方法提高了对AF机制的理解,以获得更好的导管切除策略.
科学领域:
- 心血管研究研究心血管研究
- 信号处理 信号处理
- 医学物理 医学物理
背景情况:
- 心房动 (AF) 是一种常见的心律失常,导致显著的死亡率和发病率.
- 目前用于AF的导管切除策略,特别是持久性AF,由于分析复杂电图 (EGM) 信号的局限性而面临挑战.
- 现有的方法往往忽略了对理解AF基质至关重要的EGM组件的时间频率变化的性质.
研究的目的:
- 开发和验证基于分数里埃转换 (FrFT) 的新型算法,用于在模拟心房动期间分析非静止的EGM信号.
- 通过捕捉 EGM 信号中的时间变化的频率组件来增强节律失常基质的表征.
- 通过更好地了解AF机制,提高导管切除的疗效.
主要方法:
- 开发一个预处理步骤来增强EGM波形特征.
- 实施一个用于动态EGM评估的窗口流程.
- 一个分数里埃转换 (FrFT) 顺序优化阶段,以识别紧的信号表示和频率调制率.
- 在2D心房组织模型中应用FrFT算法对模拟的AF发作.
主要成果:
- 基于FrFT的算法成功地在模拟的AF EGM信号中表征了非静止元件.
- 优化的FrFT命令被用来生成与AF传播动态相关的空间地图.
- 最佳顺序中的极端值有效地映射了负责AF的局部纤维化机制.
结论:
- 基于FrFT的算法提供了一个强大的工具,用于分析心房的复杂,时间变化的EGM信号.
- 这种方法增强了对局部节律失常基质的理解,可能导致更精确,更有效的导管切除.
- 这项研究表明,像FrFT这样的信号处理技术在促进心血管研究和AF的临床干预方面具有实用性.
更多相关视频
08:10Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
2.8K
10:17Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
Published on: April 11, 2025
2.4K
相关概念视频
01:29Electrocardiogram
9.8K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
9.8K
01:25Correlation between ECG and Cardiac Cycle
13.6K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the 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...
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...
13.6K
01:29Disturbances in Heart Rhythm
5.3K
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 heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
5.3K
01:28Electrocardiogram Fundamentals
2.2K
Introduction
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...
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...
2.2K
01:29Dysrhythmias III: Characteristics of Dysrhythmias
709
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
709
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
1.2K
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
1.2K