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相关概念视频

Electrocardiogram01:29

Electrocardiogram

5.2K
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...
5.2K
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...
1.3K
Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

3.0K
Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
3.0K
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

288
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
288
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

317
Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
317
Pulse amplitude and quality01:17

Pulse amplitude and quality

2.9K
Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
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相关实验视频

Updated: Jan 7, 2026

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis
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Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis

Published on: April 26, 2024

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使用PPG信号评估心血管疾病的研究.

Lei Wang1, Meng-Yu Hsiao1, Zi-Jun Chen1

  • 1Department of Electrical Engineering, Feng Chia University, Taichung 40724, Taiwan.

Bioengineering (Basel, Switzerland)
|December 30, 2025
PubMed
概括

这项研究通过分析光斑血学 (PPG) 信号来增强心血管疾病风险评估. 它引入了一种新方法来准确测量动脉硬度和心率变化 (HRV),改善早期发现心血管问题的方法.

关键词:
动脉硬性 动脉硬性动脉样硬化症 动脉样硬化症心血管疾病心血管疾病摄影复合体学 摄影复合体学 摄影复合体学

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Signal Acquisition, Score Interpretation, and Economics of a Non-Invasive Point-of-Care Test for Coronary Artery Disease
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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

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相关实验视频

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Signal Acquisition, Score Interpretation, and Economics of a Non-Invasive Point-of-Care Test for Coronary Artery Disease
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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

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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
  • 医学诊断 医学诊断 医学诊断

背景情况:

  • 光电显微镜 (PPG) 信号被广泛用于心血管评估.
  • 现有的计算硬度指数 (SI) 的方法可能不准确,因为一些PPG信号中没有二波,通常是由严重的动脉硬度引起的.
  • 自主神经活动减少,反映在心率变化 (HRV) 中,与心血管疾病有关.

研究的目的:

  • 用PPG信号提高心血管疾病风险评估的准确性.
  • 开发一种方法来准确计算度指数 (SI),即使在PPG信号中缺少二波.
  • 整合硬度指数 (SI),鼻腔波比 (SIN) 和心率变量 (HRV) 进行全面的心血管健康评估.

主要方法:

  • 利用改进的氧计设计来获取和处理PPG信号,包括过和放大.
  • 实施了辅助线路方法来识别PPG信号中的正弦波,并计算了正弦波比率 (SIN).
  • 分析了PPG波形特征以计算刚度指数 (SI),并对HRV进行频域分析以获得总功率 (TP).

主要成果:

  • 该研究成功地从PPG信号计算了SI,SIN和HRV.
  • 辅助线方法和SIN比率的引入提高了动脉硬度评估的准确性,解决了缺失二波引起的错误.
  • 整合SI,SIN和HRV提供了对心血管健康和风险的多方面的评估.

结论:

  • 开发的方法通过准确分析PPG信号,提供了更可靠的动脉硬性和心血管健康评估.
  • 这种方法可以更快,更方便地了解身体状况,可能有助于早期预防心血管疾病.
  • 对SI,SIN和HRV的综合分析在非侵入性心血管风险分层方面取得了重大进展.