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The effect of collateral circulation on left ventricular systolic function

Filiz Karadas1, Kenan Yalta, Okan Onur Turgut

  • 1Department of Cardiology, Cumhuriyet University, Sivas, Turkey.

Coronary Artery Disease
|April 13, 2007
PubMed

Insights

Coronary collateral circulation in severe left anterior descending artery stenosis does not improve left ventricular systolic function. Instead, it is associated with impaired function and worse outcomes.

Area of Science:

  • Cardiology
  • Vascular Biology
  • Cardiac Function

Background:

  • Conflicting evidence exists regarding the role of coronary collateral circulation in preserving left ventricular systolic function.
  • This study investigates the impact of coronary collateral circulation on left ventricular systolic function in patients with coronary artery disease.

Purpose of the Study:

  • To assess the effect of coronary collateral circulation on left ventricular systolic function in patients with coronary artery disease.

Main Methods:

  • Seventy-one patients with severe (>=95%) stenosis of the left anterior descending artery were included.
  • Coronary collateral circulation was evaluated, and its relationship with left ventricular systolic function was analyzed.

Main Results:

  • Patients with coronary collateral circulation (grade >=1) showed higher left ventricular function scores but lower ejection fractions compared to those without (grade 0).
  • Coronary collateral circulation grade positively correlated with left ventricular function score and negatively with ejection fraction.
  • The presence and grade of coronary collateral circulation were associated with impaired left ventricular systolic function.

Conclusions:

  • Coronary collateral circulation does not improve, but rather impairs, left ventricular systolic function in severe left anterior descending artery stenosis.
  • The findings contradict previous studies and suggest an association between collateral circulation and systolic dysfunction.
  • Further research with larger cohorts and long-term follow-up is needed to elucidate this complex relationship.
Abstract

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