左捆分支节奏对不同节奏电压中的QRS振幅的影响
Shengchan Wang1, Jie Geng1, Wen Yang1
1Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Journal of cardiovascular electrophysiology
|January 31, 2025
概括
在完全左束分支阻塞 (CLBBB) 和狭窄的QRS患者中,左束分支节奏 (LBBP) 在X和Y轴上显著增加了QRS波幅 (RWA). 在CLBBB患者中,LBBP还降低了Z轴RWA,可能改善心脏功能.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
- 医疗器械 医疗器械
背景情况:
- 左捆枝节奏 (LBBP) 是一种新的节奏方法,可以增强生理节奏并改善患者的结果.
- LBBP对QRS波幅 (RWA) 的影响需要进一步研究.
研究的目的:
- 探索LBBP对RWA在完全左捆分支阻塞 (CLBBB) 和狭窄QRS.患者中的作用.
- 评估LBBP诱导的RWA变化是否与心脏功能的改善相关.
主要方法:
- 一项前性观察性研究,涉及195名患者 (50名CLBBB,145名狭窄QRS).
- 在基线和各种节奏输出记录的12导电图.
- 在X,Y和Z轴 (ΣRWA) 上测量RWA以分析节奏效应.
主要成果:
- 在CLBBB和狭窄QRS组中,LBBP显著增加了X和Y轴 ΣRWA.
- 在CLBBB患者中,LBBP显著降低了Z轴 ΣRWA,但在狭窄的QRS组中没有.
- 在随访一周内,LBBP显示心脏功能显著改善.
结论:
- 在CLBBB患者中,LBBP改变RWA,增加X/Y轴振幅和减少Z轴振幅.
- 这项研究表明,RWA变化和LBBP同步之间的潜在协同效应可以改善心脏功能.
- 需要进一步的研究来阐明RWA修改在LBBP临床益处中的作用.
相关概念视频
01:19Electrophysiology of Normal Cardiac Rhythm
2.0K
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...
2.0K
01:28Electrocardiogram Fundamentals
482
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...
482
01:30Cardiac Action Potential
852
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
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
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
852
01:24ECG Interpretation of Rhythms
424
An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
424
01:29Electrocardiogram
2.1K
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...
2.1K
01:16ECG Interpretation of Arrhythmias I: Sinus Arrhythmias
172
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
172