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相关概念视频

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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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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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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Assessment of apical radial pulse01:25

Assessment of apical radial pulse

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Apical-Radial (A-R) Pulse Assessment
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
Pre-Procedural Preparation
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Special considerations while measuring pulse01:13

Special considerations while measuring pulse

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Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
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相关实验视频

Updated: Jan 9, 2026

A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
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A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers

Published on: April 21, 2017

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基于自相对应的算法用于使用手指佩戴加速度计估计心率.

Omar Nasri, Jonas Sandelin, Jukka-Pekka Sirkia

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |December 3, 2025
    PubMed
    概括
    此摘要是机器生成的。

    这项研究引入了一种节能智能环法,用于通过弹性心脏图 (BCG) 估计心率. 这种新的方法实现了高精度,显示了商业集成的潜力.

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    相关实验视频

    Last Updated: Jan 9, 2026

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    科学领域:

    • 生物医学工程 生物医学工程
    • 可穿戴技术可穿戴技术
    • 生理监测 生理监测

    背景情况:

    • 心率估计对于可穿戴健康设备至关重要.
    • 智能环中的现有方法面临着功率效率和精度方面的挑战.
    • 弹性心电图 (BCG) 提供一种非侵入式的传感方式.

    研究的目的:

    • 开发一种使用BCG的智能戒指的节能心率估计方法.
    • 评估拟议的基于BCG的算法的准确性和可靠性.
    • 评估将该技术集成到商业智能环设备中的可行性.

    主要方法:

    • 开发了一个定制的智能戒指,配有加速度计和集成的心电图作为参考.
    • 实现了一种基于自相对应的算法,用于信号预处理和心率提取.
    • 利用统计指标来评估信号质量并实现过.

    主要成果:

    • 与心电图相比,平均平均绝对误差为1.88bpm.
    • 估计在93.3%的时间内在±5bpm范围内.
    • 信号质量过将误差降低到1.40 bpm,精度在±5 bpm内为96.2%.

    结论:

    • 基于BCG的心率估计方法显示了智能戒指的重大前景.
    • 开发的算法提供了一种节能且准确的替代方案.
    • 商业化潜力很高,特别是在动作工件最小的应用中.