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相关概念视频

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
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Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

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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...
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Electrocardiogram01:29

Electrocardiogram

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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...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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...
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Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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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...
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Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
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与生理节奏相比较的左捆分支区块校正 - - 一个内科心电图研究.

Catalin Pestrea1, Ecaterina Cicala1, Sever Risca1

  • 1Department of Interventional Cardiology, Brasov County Clinical Emergency Hospital, Brasov, Romania.

Pacing and clinical electrophysiology : PACE
|February 24, 2026
PubMed
概括

他的捆绑节奏 (HBP) 和左捆绑分支区域节奏 (LBBAP) 为左捆绑分支阻塞患者提供类似的心电学改进. 这两种节拍方法都有效地减少了脱极化和再极化异常,有助于心脏重同步治疗.

关键词:
他的捆绑节奏节奏.脱极化参数 脱极化参数左捆分支机构地区节奏节奏.左捆的分支区块的分支区块.再极化参数的重极化参数

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科学领域:

  • 心脏病学 心脏病学
  • 电子生理学 电子生理学
  • 心脏节拍是因为心脏节拍.

背景情况:

  • 左捆支部阻塞 (LBBB) 和减少左心室喷射率 (LVEF) 往往需要心脏再同步治疗 (CRT).
  • 他的捆绑节奏 (HBP) 和左捆支部区域节奏 (LBBAP) 是新兴的CRT技术,对心脏脱极化和再极化有不同的影响.
  • 在同一LBBB患者中,在HBP和LBBAP之间进行过程内心电图变化的直接比较是有限的.

研究的目的:

  • 为了比较急性手术内脱极化和再极化电心图变化,校正的His捆节奏 (HBP) 和左捆分支区域节奏 (LBBAP) 之间.
  • 为了评估这些变化在基线左捆分支阻塞和减少左心室喷射分数接受CRT的患者.

主要方法:

  • 对36名接受CRT成功校正LBBAP的患者进行了回顾性审查,证明了校正HBP的可行性.
  • 测量QRS持续时间 (QRSd),QRS和T波轴,左心室激活时间 (LVAT),纠正的QT (QTc) 和JT (JTc) 间隔,QT分散 (QTd) 和纠正的T波峰至终间隔 (Tpec) 两个节奏方法.

主要成果:

  • 与基线相比,HBP和LBBAP都显著缩短了QRS持续时间,两种节奏方法之间没有显著差异.
  • 与基线和HBP相比,LBBAP导致左心室激活时间 (LVAT) 显著缩短.
  • 这两种节奏技术同样降低了QTc,JTc和Tpec间隔,表明反极化得到改善.

结论:

  • 在患有LBBB和CRT的患者中,HBP和LBBAP都在心电解极化和再极化参数上取得了可比的显著改善.
  • 与HBP相比,LBBAP显示了较快LVAT的趋势.
  • 在HBP和LBBAP之间做出选择可能取决于特定的患者因素和CRT优化的程序目标.