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Myocardial bridges: A review

Marios Loukas1, Katrina Von Kriegenbergh, Mathangi Gilkes

  • 1Department of Anatomical Sciences, School of Medicine, St. George's University, Grenada, West Indies. mloukas@sgu.edu

Clinical Anatomy (New York, N.Y.)
|July 14, 2011
PubMed

Insights

Myocardial bridges, where heart muscle crosses coronary arteries, can be an anatomical variant. However, they may cause cardiac ischemia through systolic compression or reduced arterial flow, impacting coronary blood flow reserve.

Area of Science:

  • Cardiology
  • Anatomy
  • Pathophysiology

Background:

  • Myocardial bridges are common and often asymptomatic, suggesting they can be a normal anatomical variant.
  • The clinical significance of myocardial bridges remains debated, with some cases linked to cardiac ischemia.

Purpose of the Study:

  • To review the existing evidence on myocardial bridging.
  • To explore the potential mechanisms by which myocardial bridges may cause myocardial ischemia.

Main Methods:

  • Literature review of studies on myocardial bridging and its clinical implications.
  • Analysis of proposed pathophysiological mechanisms for ischemia in myocardial bridging.

Main Results:

  • Myocardial bridging can be an anatomical variant, not always causing symptoms.
  • Two primary mechanisms are proposed for ischemia: systolic compression and reduced arterial flow.
  • Both mechanisms can lead to diminished coronary blood flow reserve.

Conclusions:

  • Myocardial bridging has a complex relationship with cardiac ischemia.
  • Further research is needed to fully understand the clinical significance and management of myocardial bridges.

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