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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

7.1K
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...
7.1K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

13.7K
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...
13.7K
Instrumentation Amplifier01:25

Instrumentation Amplifier

1.2K
An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
1.2K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.7K
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...
1.7K
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.9K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.9K
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

15.9K
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....
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Related Experiment Video

Updated: Mar 3, 2026

Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging
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Quantification of Mouse Heart Left Ventricular Function, Myocardial Strain, and Hemodynamic Forces by Cardiovascular Magnetic Resonance Imaging

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ECG Data Encryption Then Compression Using Singular Value Decomposition.

Ting Yu Liu, Kuan Jen Lin, Hsi Chun Wu

    IEEE Journal of Biomedical and Health Informatics
    |May 3, 2017
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel encryption-then-compression method for electrocardiogram (ECG) data. It ensures patient privacy and maintains signal quality and compression efficiency for secure ECG monitoring.

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

    • Biomedical Engineering
    • Data Compression
    • Cryptography

    Background:

    • Electrocardiogram (ECG) monitoring is crucial in healthcare, necessitating efficient data compression for storage and transmission.
    • Protecting patient privacy requires processing biomedical signals within encrypted domains.
    • Current encryption-then-compression (ETC) methods for multimedia compromise either compression efficiency or signal quality.

    Purpose of the Study:

    • To present the first ETC approach specifically designed for processing ECG data.
    • To develop a method that ensures data privacy without sacrificing compression efficiency or signal quality.
    • To enable direct processing of encrypted ECG signals.

    Main Methods:

    • Utilizing singular value decomposition (SVD) for data compression.
    • Implementing an encryption-then-compression (ETC) framework tailored for ECG signals.
    • Evaluating the quality-controlled compression of encrypted ECG data.

    Main Results:

    • The proposed ETC approach successfully protects ECG data privacy.
    • Reconstructed ECG signals exhibit the same quality as unencrypted compressed data.
    • Compression efficiency is maintained relative to unencrypted compression methods.
    • Experimental results validate the system's effectiveness for ECG data security and compression.

    Conclusions:

    • The novel ETC approach offers an effective solution for secure and efficient ECG data management.
    • This method addresses the critical need for privacy-preserving processing of sensitive biomedical signals.
    • The technique demonstrates the feasibility of achieving high-quality, compressed, and encrypted ECG data.