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相关概念视频

ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

286
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....
286
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

445
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...
445
Downsampling01:20

Downsampling

112
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
112
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
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

150
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
150
Correlation between ECG and Cardiac Cycle01:24

Correlation between ECG and Cardiac Cycle

2.8K
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...
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相关实验视频

Updated: May 14, 2025

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
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一个2D心电图信号压缩算法,使用1D离散波形变换.

Hardev Singh Pal1,2, A Kumar3, Amit Vishwakarma3

  • 1Department of ECE, PDPM-Indian Institute of Information Technology Design and Manufacturing Jabalpur, Jabalpur, 482005, Madhya Pradesh, India. 20peco05@iiitdmj.ac.in.

Physical and engineering sciences in medicine
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概括
此摘要是机器生成的。

这项研究介绍了一种高效的压缩算法,用于电心电图 (ECG) 信号,使用1D科恩-多贝希斯-费奥沃 9/7波波变换. 该方法增强了可穿戴医疗设备的数据存储和传输.

关键词:
适应的哈夫曼编码.电脑心电图信号压缩压缩波段变换的波段变换是什么

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Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
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相关实验视频

Last Updated: May 14, 2025

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
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Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
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科学领域:

  • 生物医学工程 生物医学工程
  • 信号处理 信号处理
  • 数据压缩数据压缩

背景情况:

  • 收获心电图 (ECG) 信号对于诊断心脏病至关重要.
  • 支持物联网的可穿戴设备越来越多地用于远程医疗保健,产生大量数据.
  • 由于存储和传输的局限性,高效的ECG数据管理至关重要.

研究的目的:

  • 为二维心电图信号提出一个高效的压缩算法.
  • 提高远程医疗应用中ECG数据的存储和传输效率.
  • 评估压缩性能与现有方法和各种波形变换相比.

主要方法:

  • 将 1D Cohen-Daubechies-Feauveau 9/7 波段变换应用于 2D ECG 信号的应用.
  • 变换系数的量化和基于目标重建错误的保留.
  • 适应性哈夫曼编码用于进一步压缩量化系数.
  • 在MIT-BIH心律失常数据库进行测试并评估异常影响.

主要成果:

  • 拟议的算法通过增加稀疏性来证明了更好的压缩性能.
  • 评估的指标包括质量评分 (30.23),百分比根-平方平均差 (5.07),信号-噪声比 (26.78 dB) 和压缩比 (7.21).
  • 该方法与其他波形变换和现有方法相比,显示出更高的压缩效率.

结论:

  • 开发的压缩算法显著提高了ECG数据的存储效率.
  • 该方法为实时数据传输带宽利用提供了潜在的改进.
  • 这种方法支持远程医疗和可穿戴医疗保健系统中有效的ECG数据管理.