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相关概念视频

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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相关实验视频

Updated: Jun 1, 2026

Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function
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心肌血流和心肌吸收 (201) Tl和 (99m) Tc-sestamibi 在冠状动脉血管扩张诱导的CGS-21680,一个选择性腺A(2A) 受体agonist 的心肌吸收.

Z X He1, E Cwajg, W Hwang

  • 1Section of Cardiology, Baylor College of Medicine/Methodist Hospital, Houston, Tex, USA.

Circulation
|July 25, 2000
PubMed
概括

CGS-21680,一种腺A(2A) 激动剂,有效扩大冠状动脉,并为 perfusion 成像创造心肌血流 (MBF) 的显著差异. 这种药物对药理学性心肌输液成像具有前景.

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Last Updated: Jun 1, 2026

Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function
10:21

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科学领域:

  • 心脏病学 心脏病学
  • 药理学 药理学是指药理学的学科.
  • 核医学就是核医学.

背景情况:

  • 氨酸A(2A) 激动剂正在研究它们的血液动力学和冠状动脉血管扩张作用.
  • CGS-21680是一种强效和选择性的腺氨酸A (Adenosine A) 激动剂.
  • 研究CGS-21680在 perfusion scintigraphy中作为压力模式的潜在使用.

研究的目的:

  • 评估CGS-21680.0的血液动力学和冠状动脉血管扩张作用.
  • 评估CGS-21680作为心肌输液成像中的应激剂的疗效.

主要方法:

  • 使用了一种诱导左前下垂冠状动脉 (LAD) 狭窄的狗模型.
  • 氨酸和CGS-21680被输入以评估冠状动脉流动速度.
  • 用放射性微球测量心肌动脉血流 (MBF).
  • 心肌输液成像使用-201 ((201) Tl) 和技术-99m-sestamibi ((99m) Tc-sestamibi) 进行.

主要成果:

  • 与腺相比,CGS-21680增加了心率,并且导致系统性血压下降的幅度较小.
  • 腺和CGS-21680都显著增加了非静脉左环冠状动脉 (LCx) 区域的MBF.
  • 对于任何一个代理,MBF在狭窄的LAD领土上都没有显著变化.
  • 肌肉心脏扫描显示所有狗的输液缺陷,两种药物的狭窄/对照比率相似.

结论:

  • CGS-21680诱导冠状动脉血管扩张类似于腺.
  • CGS-21680在MBF和放射追踪器的吸收中产生了显著的异质性.
  • CGS-21680是药理学心肌输液成像的一个有前途的药物.