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相关概念视频

Pulse rhythm01:30

Pulse rhythm

925
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...
925
Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

269
Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
269
Electrocardiogram01:29

Electrocardiogram

3.2K
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...
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相关实验视频

Updated: Sep 11, 2025

Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
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持续和自主监测左心室dP/dtmax的变化,使用心上加速度计.

Vetle Christoffer Frostelid1,2, Ali Wajdan1,2, Manuel Villegas-Martinez1,3

  • 1The Intervention Centre, Oslo University Hospital, Oslo, Norway.

Annals of biomedical engineering
|August 18, 2025
PubMed
概括

一种使用表心加速计的新方法可以重建3D心脏壁运动,从而能够持续监测心脏收缩率. 这种方法提供了一个有希望的,不那么侵入性的工具来跟踪心脏功能随着时间的推移.

关键词:
加速计 加速计 加速计心脏功能是如何工作的心脏机械学心脏机械学契约性 契约性是指契约性.监控 监控 监控 监控dP/dtmax 是一个值.

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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
  • 医疗器械技术 医疗器械技术

背景情况:

  • 评估心脏收缩功能通常依赖于侵入性或间歇性方法,限制持续监测.
  • 脊心加速仪为心脏功能监测提供了潜力,但往往未充分利用信号数据.
  • 现有的技术缺乏空间和时间分辨率,无法进行可靠的,持续的临床评估.

研究的目的:

  • 开发一种用于在3D空间中重建心上加速度计位置的方法.
  • 为了使心脏功能指数可以在拉格朗日参考框架中提取.
  • 通过使用加速度计数据,引入一种新的心脏收缩率替代指标.

主要方法:

  • 心上加速度计3D位置的重建.
  • 在拉格朗的框架中提取心脏功能指数.
  • 计算拉格朗的标准偏差加速度 (σ Acc) 的每次心跳.

主要成果:

  • 拉格朗捷加速度的标准偏差 (σ Acc) 被确定为一种新的收缩性指标.
  • 在σAcc的变化与左心室压力最大变化速率的变化有很强的相关性.
  • 在动物数据 (n=29) 中,在各种血液动力学条件中观察到强烈的相关性.

结论:

  • 这项原则证明研究引入了一种使用心表加速度计评估心脏收缩率的新方法.
  • 这些发现表明,长期持续监测心脏功能的潜力.
  • 心加速计可以被用作心脏健康的多功能,自主监测设备.