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相关概念视频

Pulse01:16

Pulse

407
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
407
Pulse amplitude and quality01:17

Pulse amplitude and quality

1.5K
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...
1.5K
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

551
Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
551
Pulse rhythm01:30

Pulse rhythm

743
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...
743
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

3.0K
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...
3.0K
Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

778
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...
778

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相关实验视频

Updated: May 22, 2025

Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
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预测冠状动脉损伤严重程度使用脉冲波波:一个基于SYNTAX得分的研究.

Haitian Li1, Buxing Chen2, GinChung Wang3

  • 1Beijing University of Chinese Medicine, Beijing 100029, China.

Current cardiology reviews
|May 21, 2025
PubMed
概括

手之间的脉冲波波的差异可以预测冠状动脉疾病的严重程度. 这种非侵入性方法为评估冠状动脉病变和帮助临床诊断提供了有价值的工具.

关键词:
动脉压力波是一种动脉压力波.在SYNTAX中,分数是SYNTAX的分数.冠状动脉病变的程度.声器和声器的声器

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科学领域:

  • 心血管医学 心血管医学
  • 生物医学工程 生物医学工程
  • 医学诊断 医学诊断 医学诊断

背景情况:

  • 冠状动脉疾病 (CAD) 的评估通常依赖于侵入性手术.
  • 评估冠状动脉损伤严重程度的非侵入性方法非常受欢迎.
  • 脉冲波分析为心血管评估提供了一个潜在的非侵入性方法.

研究的目的:

  • 为了研究脉冲波波指数差异 (左手与右手) 和SYNTAX得分之间的相关性.
  • 探索脉冲波波对冠状动脉损伤严重性的预测潜力.
  • 开发一种用于CAD评估的非侵入性诊断模型.

主要方法:

  • 摄影脉冲扫描记录了两只手的动脉压力波信号.
  • 里埃转换分解波成第0至第11波 (振幅,相位,能量).
  • 用逻辑回归和ROC曲线计算和分析了手间波指数的差异,并按性别分层.

主要成果:

  • 开发了冠状动脉损伤严重程度的性别特定预测模型 (SYNTAX评分≥22).
  • 男性组模型:AUC 0.89 (Bootstrap 0.85),基于特定的和指数差异.
  • 女性组模型:AUC 0.92 (Bootstrap 0.84),基于不同的和指数差异.

结论:

  • 手之间的脉冲波波的差异有效地反映了冠状动脉损伤的严重程度.
  • 使用脉冲波波分析的诊断模型显示了CAD的良好分辨能力.
  • 这种非侵入性方法为冠状动脉疾病的临床评估提供了有价值的工具.