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Electrocardiogram01:29

Electrocardiogram

1.7K
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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Cardiac Action Potential01:30

Cardiac Action Potential

663
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
663
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

325
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....
325
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

1.8K
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...
1.8K
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

737
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...
737
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

457
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...
457

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相关实验视频

Updated: May 16, 2025

High-Throughput Analysis of Optical Mapping Data Using ElectroMap
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High-Throughput Analysis of Optical Mapping Data Using ElectroMap

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解码节奏尖:一个心电图的挑战

Avinash Jeewooth1, Atul Kaushik2, Aparna Jaswal1

  • 1Department of Electrophysiology, Fortis Escorts Heart Institute (FEHI), New Delhi, India.

JACC. Case reports
|April 4, 2025
PubMed
概括
此摘要是机器生成的。

这项研究详细介绍了一位50岁的女性.

关键词:
心脏起器的心脏起器电心电图 (ECG) 是一种心电图.电力生理学 电力生理学

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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
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相关实验视频

Last Updated: May 16, 2025

High-Throughput Analysis of Optical Mapping Data Using ElectroMap
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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
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Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia

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科学领域:

  • 心脏病学 心脏病学
  • 电力生理学 电力生理学

背景情况:

  • 完全的心脏阻塞存在显著的症状性心肌梗塞的风险.
  • 心脏起器植入是症状性心房阻的标准治疗方法.

研究的目的:

  • 为了呈现一个有症状的完整心脏阻塞病例.
  • 讨论诊断方法,包括心电图解读.
  • 为了突出管理双室心脏起器植入的管理.

主要方法:

  • 一个50岁的女性患者的病例报告.
  • 电心电图 (ECG) 分析用于诊断完全心脏阻塞.
  • 通过手术植入双腔心脏起器.

主要成果:

  • 成功植入了双室心脏起器.
  • 解决与完全心脏阻塞相关的症状.
  • 在术后心电图上展示有效的节奏.

结论:

  • 双室心脏起器植入是有效的症状完全的心脏阻塞.
  • 彻底的心电图解读对于诊断和管理至关重要.
  • 了解底层机制有助于患者的护理.