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Coronary collateral circulation in patients of coronary ectasia with significant coronary artery disease

Po-Chao Hsu1, Ho-Ming Su2, Hsiang-Chun Lee3

  • 1Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan ; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan ; Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.

Plos One
|January 30, 2014
PubMed

Insights

Coronary ectasia (CE) is linked to poorer coronary collateral development in patients with significant coronary artery disease (SCAD). This finding highlights the importance of assessing CE in SCAD patients for better cardiovascular event prediction.

Area of Science:

  • Cardiology
  • Vascular Biology
  • Interventional Cardiology

Background:

  • Coronary ectasia (CE) often coexists with coronary stenosis, leading to myocardial ischemia.
  • Coronary collaterals are crucial for protecting the myocardium from ischemia and reducing cardiovascular events.
  • The role of CE in the development of coronary collaterals remains understudied.

Purpose of the Study:

  • To investigate the association between coronary ectasia (CE) and coronary collateral development in patients with significant coronary artery disease (SCAD).

Main Methods:

  • Evaluated 1020 patients undergoing coronary angiography; 552 with SCAD (diameter stenosis >70%) were analyzed.
  • Defined CE as an ectatic diameter 1.5 times larger than the adjacent reference segment.
  • Classified coronary collateral function using the Rentrop score (poor: grades 0-1; good: grades 2-3).

Main Results:

  • CE lesions were present in 13.2% of patients, predominantly in the right coronary artery.
  • Patients with CE exhibited poorer coronary collateral function (58.2% vs 71.2%, p=0.040).
  • Multivariate analysis identified CE (OR=0.544, p=0.048) as a significant predictor of poorer coronary collateral development.

Conclusions:

  • The presence of coronary ectasia is associated with impaired coronary collateral development in patients with significant coronary artery disease.
  • This association suggests CE may negatively impact myocardial protection in SCAD patients.
  • Further research is warranted to explore the clinical implications of this finding.
Abstract

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