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相关概念视频

Electrocardiogram01:29

Electrocardiogram

1.6K
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...
1.6K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

431
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...
431
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

270
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....
270
Correlation between ECG and Cardiac Cycle01:24

Correlation between ECG and Cardiac Cycle

2.7K
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...
2.7K
Cardiac Action Potential01:30

Cardiac Action Potential

567
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
567

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相关实验视频

Updated: May 9, 2025

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
06:07

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

Published on: May 23, 2021

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基于心电图像成像的T波替代值估计的参考.

Estela Sánchez-Carballo1, Francisco Manuel Melgarejo-Meseguer1, Ramya Vijayakumar2

  • 1Department of Signal Theory and Communications, Telematics, and Computing, Universidad Rey Juan Carlos, Fuenlabrada, 28942 Madrid, Spain.

IEEE access : practical innovations, open solutions
|April 30, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了评估T波替代体检测方法的新参考,这对于预测心脏突然死亡至关重要. 开发的方法提高了识别这些关键心脏事件的准确性.

关键词:
引导重新抽样重新抽样.在T波交替中使用T波.在T波细分的过程中,T波的细分电心图像成像电心图像成像这是一个参考参考,参考参考.时间空间研究研究.

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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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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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相关实验视频

Last Updated: May 9, 2025

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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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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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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179

科学领域:

  • 心脏病学 心脏病学
  • 生物医学工程 生物医学工程
  • 信号处理 信号处理

背景情况:

  • 突然心脏病死亡 (SCD) 是死亡的一个重要原因.
  • T波替代体 (TWA) 是SCD的可靠预测器.
  • 电心图像提供了时空洞察力,但缺乏用于TWA分析的具体参考和细分方法.

研究的目的:

  • 为评估TWA估计方法制定一个参考标准.
  • 为心电成像数据引入一种新的T波细分程序.
  • 为了创建一个基于引导的分类器用于TWA检测.

主要方法:

  • 开发了一种新的T波细分程序,并与标准方法进行比较.
  • 一个时空高斯函数被用来将TWA整合到心表信号中,创建一个参考.
  • 一个基于引导的分类器被实施用于TWA检测.

主要成果:

  • 新的T波细分程序与常用的方法相比,显示出更高的性能.
  • 生成的参考允许在噪声中检测TWA的幅度低至大约0.15mV.
  • 开发的分类器表现一致,检测TWA的振幅约为0.08mV.

结论:

  • 这项研究为评估TWA估计方法提供了重要的时空参考.
  • 开发的方法提高了TWA检测的准确性和可靠性.
  • 建立TWA分析的黄金标准可以帮助减少SCD发病率.