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相关概念视频

Pulse rhythm01:30

Pulse rhythm

1.3K
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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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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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:
889
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,...
6.1K
Regulation of Pulse01:20

Regulation of Pulse

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Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
2.1K
Regulation of Heart Rates01:31

Regulation of Heart Rates

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The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
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相关实验视频

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Semi-automated Optical Heartbeat Analysis of Small Hearts
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混合CNN-LSTM模型用于从脉冲到脉冲间隔评估心率变化.

Alok Kumar Sharma, Shing-Hong Liu, Jia-Jung Wang

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    概括
    此摘要是机器生成的。

    这项研究使用深度学习模型从PPG信号中估计心率变化 (HRV),提供非侵入性心血管健康监测. 该模型显示了准确的R-R间隔预测,特别是在较低的呼吸速率.

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    相关实验视频

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    Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
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    科学领域:

    • 生物医学工程 生物医学工程
    • 心血管生理学心血管生理学
    • 人工智能在医学中的应用

    背景情况:

    • 心率变化 (HRV) 对于评估自主功能和心血管健康至关重要.
    • 传统的HRV监测依赖于心电图 (ECG),限制了非侵入性应用.
    • 摄影电流图 (PPG) 为HRV分析提供了一个潜在的非侵入性来源.

    研究的目的:

    • 开发和验证混合卷积神经网络-长期短期记忆 (CNN-LSTM) 模型.
    • 从PPG信号中估计R-R间隔 (RRI),用于非侵入性HRV监测.
    • 在受控呼吸条件下评估模型的准确性.

    主要方法:

    • 使用混合CNN-LSTM深度学习架构.
    • 从19名受试者的PPG数据中训练并验证了模型.
    • 在受控呼吸速率 (6,18,30次/分钟) 下收集的数据.

    主要成果:

    • 在预测和实际RRI值之间实现了高相关性.
    • 证明了平均绝对误差 (MAE) 的减少,从62.01ms降至49.62ms.
    • 在较低的呼吸率下观察到精确的HRV捕获,在较高的速度下低估了频率组件 (VLF,LF,HF) (p < 0.01).

    结论:

    • 深度学习模型显示了使用PPG信号进行实时,非侵入性HRV评估的前景.
    • 这种方法为基于ECG的HRV监测提供了可行的替代方案.
    • 通过可穿戴设备实现持续的心血管监测,用于远程患者护理和早期疾病检测.