在过早心室收缩的切除过程中,QRS复合物的缩小
Helge Haarmann1, Nibras Soubh1, Eva Rasenack1
1Clinic for Cardiology and Pneumology, Heart Center, University Medical Center Göttingen, Germany.
Journal of electrocardiology
|May 21, 2025
概括
在过早心室收缩的废除过程中,观察到QRS复合体的缩小,该复合体的患者已经离开了捆绑分支块. 这一发现对于理解心脏电生理学在剥离过程中的重要.
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:
- 过早的心室收缩 (PVCs) 可能很难切除,特别是在患有先前传导异常的患者中.
- 左捆分支阻塞 (LBBB) 影响心室脱极化模式,可能使电生理学评估复杂化.
- 射频除是症状PVC的常见治疗方法.
研究的目的:
- 在LBBB.患者的PVC剥离过程中报告一个不寻常的电生理学发现.
- 描述在废除过程中观察到QRS复杂收窄的情况.
主要方法:
- 一个病人的病例报告为PVC进行了导管切除.
- 在手术过程中进行心内电图记录和12导电图监测.
- 分析QRS复杂形态变化与除能量交付相关的分析.
主要成果:
- 在切除PVC时观察到QRS复合物的显著缩小.
- 这种缩小发生在除能量的应用期间.
- 底层的节奏是左捆的分支块.
结论:
- 在患有LBBB的患者中,PVC切除过程中,QRS复合体狭窄可能是一个急性,短暂的发现.
- 这种现象可能反映在导管操纵或能量输送期间心室导电发生变化.
- 需要进一步的研究,以了解这一观察的机制和临床影响.
关键词:
带脱离节律的节奏.LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB LBBB通过PVC除,可以进行PVC除.更多相关视频
12:45Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
Published on: December 11, 2017
10.4K
28:13Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
33.2K
相关概念视频
01:28Disturbances in Heart Rhythm
785
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...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
785
01:30Cardiac Action Potential
728
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
728
01:20Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
746
Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
746
01:25Correlation between ECG and Cardiac Cycle
3.0K
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...
3.0K
01:12Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
872
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
872
01:19Electrophysiology of Normal Cardiac Rhythm
1.9K
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...
1.9K