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Related Concept Videos

Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

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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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Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

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Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
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Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
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Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
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Electrocardiogram01:29

Electrocardiogram

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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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Related Experiment Video

Updated: Dec 30, 2025

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver
14:28

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver

Published on: June 27, 2025

866

A Correlation-Based Algorithm for Beat-to-Beat Heart Rate Estimation from Ballistocardiograms.

Xin Wen, Yanqi Huang, Xiaomei Wu

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |January 18, 2020
    PubMed
    Summary

    A new algorithm estimates heart rate using ballistocardiography (BCG), a non-contact method. This technique accurately tracks beat-to-beat intervals, offering a promising solution for home cardiac monitoring.

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Signal Processing

    Background:

    • Ballistocardiography (BCG) is a non-contact technique measuring the body's mechanical response to cardiac ejection.
    • Accurate beat-to-beat heart rate estimation is crucial for long-term cardiac monitoring.
    • Existing methods may require physical contact or complex implementation.

    Purpose of the Study:

    • To develop a universal and easily implementable algorithm for estimating beat-to-beat heart rate from BCG signals.
    • To validate the algorithm's accuracy against electrocardiogram (ECG) measurements.

    Main Methods:

    • The algorithm utilizes autocorrelation to generate heartbeat patterns within BCG signals.
    • These patterns are then matched to the remaining signal to identify individual heartbeats.
    • The proposed method relies on signal correlation for heart rate estimation.

    Main Results:

    • The algorithm demonstrated high accuracy in beat-to-beat heart rate estimation.
    • A relative beat-to-beat interval error of 1.66% was achieved.
    • A relative average heart rate error of 1.25% was observed when compared to synchronized ECG.

    Conclusions:

    • The developed algorithm offers a highly universal and simple approach for BCG-based heart rate estimation.
    • This method shows significant potential for non-contact, long-term cardiac monitoring in home environments.
    • The algorithm's accuracy supports its application in wearable or ambient assisted living technologies.