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Updated: Aug 19, 2026

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
08:13

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography

Published on: February 16, 2016

[Microcirculation in the myocardium]

K Ichihara1, K Satoh

  • 1Department of Pharmacology, Hokkaido College of Pharmacy, Otaru, Japan.

Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
|July 21, 1999
PubMed

Insights

Coronary vasodilators may worsen myocardial ischemia by causing a coronary-steal effect. This study shows these drugs are not always effective for treating ischemic heart conditions.

Area of Science:

  • Cardiovascular physiology
  • Myocardial blood flow
  • Coronary circulation

Context:

  • The coronary arteries supply oxygenated blood to the myocardium.
  • The subendocardial layers are particularly vulnerable to ischemia due to extravascular compression during systole.
  • Coronary vasodilators are used to treat angina but can have adverse effects.

Purpose:

  • To investigate the microcirculatory changes in ischemic myocardium induced by coronary vasodilators.
  • To evaluate the efficacy of coronary vasodilators in ischemic myocardial tissue.

Summary:

  • Coronary blood flow cessation leads to myocardial ischemia, with the endocardium being highly susceptible.
  • Potent coronary vasodilators can induce a coronary-steal phenomenon, potentially exacerbating ischemia-induced injury.
  • The study demonstrates that coronary vasodilators do not consistently benefit ischemic myocardium.

Impact:

  • Challenges the universal efficacy of coronary vasodilators in treating myocardial ischemia.
  • Highlights the risk of coronary-steal and worsening injury with vasodilator use.
  • Informs clinical practice regarding the use of anti-anginal drugs in ischemic heart conditions.

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