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相关概念视频

Pulse rhythm01:30

Pulse rhythm

717
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...
717
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
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

699
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
699
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

539
Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
539

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相关实验视频

Updated: May 8, 2025

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
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使用心率变化参数进行远程谎言检测的LieRHRV系统.

Moran Davoodi1, Nitay Aspis1,2, Yael Drori1

  • 1Laboratory of Bioelectric and Bioenergetic Systems, Faculty of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.

Scientific reports
|December 27, 2024
PubMed
概括

一个新的远程谎言检测算法,LieRHRV,使用面部视频来分析心率变化 (HRV). 这种无接触方法显示出高精度,为传统的测谎仪测试提供了一个有希望的替代方案.

关键词:
摄像机 摄像机 摄像机 摄像机机器学习是机器学习.遥控测谎仪 遥控测谎仪

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科学领域:

  • 生理测量测量生理测量
  • 生物识别安全 生物识别安全
  • 心理生理学 心理生理学

背景情况:

  • 标准的测谎仪测试依赖于心率等生理信号,但有局限性,包括主观解释和直接接触.
  • 远程光电脉冲图 (rPPG) 提供了一种无接触的方法来测量面部视频中的生理信号,特别是心率变化 (HRV).

研究的目的:

  • 引入和评估"LieRHRV",一种基于完全从面部视频中远程提取的HRV参数的新型谎言检测算法.
  • 通过比较从rPPG获得的HRV参数与心电图 (ECG) 和光电脉图 (PPG) 的参数来评估HRV参数的质量.

主要方法:

  • 使用黄金标准数据集和对39名志愿者进行前性研究,比较了rPPG,ECG和PPG的HRV参数.
  • 开发并测试了使用提取的HRV参数用于谎言检测准确性的LieRHRV算法.
  • 对基线"天真"模型进行算法性能评估.

主要成果:

  • 从PPG和ECG中证明有效的HRV参数提取,公开数据集中的结果 (平均60%) 和前性研究中的结果 (80%) 相似.
  • LieRHRV实现了高精度:91.7% (rPPG),87.3% (PPG) 和83.3% (ECG),显著优于原始模型 (分别为67.0%,61.0%,58.3%).

结论:

  • LieRHRV是一个可行的和有效的远程谎言检测算法,利用面部rPPG的HRV分析.
  • 这种无接触技术比传统的测谎仪限制有了显著的进步,提供了更好的准确性和用户体验.