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相关概念视频

Electrocardiogram01:29

Electrocardiogram

5.3K
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...
5.3K
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

12.2K
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....
12.2K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.4K
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...
1.4K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

11.6K
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...
11.6K
Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

704
Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
704
Cardiac Action Potential01:30

Cardiac Action Potential

5.6K
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
5.6K

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相关实验视频

Updated: Jan 9, 2026

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Published on: December 11, 2019

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学习将心电图信号压缩到快速响应代码中.

Apoorva Srivastava1, Dipayan Dewan2, Amit Patra2

  • 1Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India. apoorva.s.2311@gmail.com.

Scientific reports
|December 1, 2025
PubMed
概括
此摘要是机器生成的。

一种新的基于学习的压缩方法将心电图 (ECG) 数据嵌入到QR码中,以便安全共享. 这种方法增强了连接的卫生系统,改善了在资源较少的环境中检测心血管疾病 (CVD).

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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: Jan 9, 2026

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
05:03

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Published on: December 11, 2019

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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice
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科学领域:

  • 生物医学工程 生物医学工程
  • 数字健康数字健康
  • 医疗信息学 医疗信息学

背景情况:

  • 电心电图 (ECG) 对于诊断心血管疾病 (CVD) 是至关重要的.
  • 在低收入和中等收入国家 (LMICs) 分享心电图数据是具有挑战性的,因为有限的连接健康 (CH) 基础设施和与纸质记录相关的隐私风险.
  • 快速响应 (QR) 代码为安全和高效的数据传输提供了潜在的解决方案.

研究的目的:

  • 提出和验证一种基于学习的ECG数据压缩方法,适合QR码嵌入.
  • 确保在心电图数据传输期间保护临床关键信息和患者隐私.
  • 允许ECG数据集成到连接的卫生系统中,以改善心血管疾病监测和早期检测.

主要方法:

  • 开发了一种基于学习的压缩技术,以保护来自心电图信号的关键临床信息.
  • 压缩的心电图数据使用Brotli算法对QR码嵌入进行了无损编码.
  • 该方法使用公共数据集验证了健康个体和26种心血管疾病病理的患者的ECG记录.

主要成果:

  • 拟议的方法实现了82.37.7的压缩系数 (CF).
  • 对于II心电图信号,PRD为2.70%,SSIM为0.94.4%.
  • 对于-I心电图信号,PRD为2.80%,SSIM为0.94,表明数据的高保真性.
  • 该方法在压缩和数据保存方面超过了现有的最先进的方法.

结论:

  • 开发的基于学习的压缩和QR码嵌入方法为ECG数据传输提供了安全,高效和可扩展的解决方案.
  • 这种方法有助于将心电图数据集成到连接的卫生系统中,特别是在资源有限的环境中.
  • 该方法支持持续监测和早期发现心血管疾病,增强患者护理.