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Coronary vasospasm and the regulation of coronary blood flow

Srilakshmi Konidala1, David D Gutterman

  • 1Department of Medicine, Cardiovascular Center, General Clinical Research Center, Milwaukee, WI 53226, USA.

Progress in Cardiovascular Diseases
|February 13, 2004
PubMed

Insights

Endothelial dysfunction shifts coronary artery response from vasodilation to constriction, causing coronary vasospasm. This review explores mechanisms, predisposing factors, and new therapies for this condition.

Area of Science:

  • Cardiovascular Physiology
  • Endothelial Function
  • Vascular Biology

Background:

  • Epicardial arteries normally contribute little to coronary vascular resistance.
  • Endothelial dysfunction can reverse vasodilator responses to vasoconstriction.
  • Coronary vasospasm arises from this shift, leading to transient arterial obstruction.

Purpose of the Study:

  • To review mechanisms of coronary circulation in health.
  • To examine pathophysiologic changes in coronary vasospasm.
  • To discuss predisposing conditions and novel therapies.

Main Methods:

  • Literature review of current understanding.
  • Analysis of pathophysiologic mechanisms.
  • Exploration of genetic and other predisposing factors.

Main Results:

  • Endothelial dysfunction triggers vasoconstriction in response to stimuli like acetylcholine and serotonin.
  • Coronary vasospasm involves focal, transient epicardial artery obstruction.
  • The condition is linked to myocardial ischemia and characteristic echocardiographic changes.

Conclusions:

  • Coronary vasospasm results from a loss of endothelial vasodilator influence and unopposed vasoconstriction.
  • Understanding these mechanisms is key to developing targeted therapies.
  • Genetic factors and contractile dysfunction are important considerations.

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