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相关概念视频

Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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...

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相关实验视频

Updated: Jul 13, 2026

Ultrasonic Assessment of Myocardial Microstructure
10:53

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

通过超声波组织表征来检测人类异常心肌病的独特的跨壁结构.

A K Wong1, E D Verdonk, B K Hoffmeister

  • 1School of Medicine, Washington University, St. Louis, Mo.

Circulation
|October 1, 1992
PubMed
概括

超声波组织表征揭示了在异常心肌病和心肌梗塞的异常心肌病和心肌梗塞中明显的跨壁结构变化. 这些发现突出了独特的结构变化,可以通过定量超声波检测到心脏病评估.

科学领域:

  • 心血管成像 - 心血管成像
  • 生物医学工程 生物医学工程
  • 病理学 病理学 病理学

背景情况:

  • 非侵入性评估固态心肌病是具有挑战性的.
  • 定量超声波已被用于表征心肌结构.
  • 这项研究的目的是利用超声波组织特征来检测异常扩展性心肌病的特定结构变化.

研究的目的:

  • 定义超声波组织表征在检测异常扩张心肌病的三维跨壁结构的特定变化的作用.
  • 用超声波将异常心肌病的结构变化与心肌梗塞区分开来.

主要方法:

  • 量化超声波用于测量来自人类心脏活检样本的依赖频率的反向散射.
  • 样本包括来自异常心肌病,正常心肌和心脏病发作区域的组织.
  • 分析了射频数据,以计算反向散射 (n),肌纤维直径和跨壁层纤维化百分比的频率依赖性.

主要成果:

  • 异常性心肌病症显示出反向散射的频率依赖性增加,以及从上心脏到内心脏的肌纤维直径减少.
  • 心肌梗塞表现出背向散射的频率依赖性下降,以及从上心脏到内心脏的纤维化增加.
  • 正常的心肌组织在这些参数中没有显著的转移性趋势.

结论:

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Scanning Electron Microscopy of Macerated Tissue to Visualize the Extracellular Matrix
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Scanning Electron Microscopy of Macerated Tissue to Visualize the Extracellular Matrix

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Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo
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Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo

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Last Updated: Jul 13, 2026

Ultrasonic Assessment of Myocardial Microstructure
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Scanning Electron Microscopy of Macerated Tissue to Visualize the Extracellular Matrix
10:21

Scanning Electron Microscopy of Macerated Tissue to Visualize the Extracellular Matrix

Published on: June 14, 2016

Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo
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Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo

Published on: October 2, 2021

  • 超声波组织表征可以检测异质的散射结构在异常性心肌病和心肌梗塞的异质性 transmural 分布.
  • 背散射频率依赖的明显的跨模态趋势反映了不同的结构异质性机制.
  • 这些发现表明,超声波可以根据细胞大小和纤维化梯度区分病理过程.