Risk evaluation for coronary artery disease in patients with impaired glucose tolerance after a successful coronary

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Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
10:28

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

Published on: March 15, 2022

Mitsuaki Horigome1, Naoya Hattori, Hiroki Kasai

  • 1Department of Cardiovascular Medicine, Shinshu University Graduate School of Medicine, Matsumoto, Japan.

Clinical Nuclear Medicine
|June 4, 2011
PubMed

Insights

Coronary artery disease patients undergoing percutaneous coronary intervention showed preserved endothelial function. However, risk factors like high blood sugar and cholesterol significantly impacted non-PCI segments, suggesting their influence on coronary lesions.

Area of Science:

  • Cardiology
  • Vascular Biology
  • Metabolic Syndrome

Background:

  • Coronary artery disease (CAD) is often associated with risk factors impacting endothelial function.
  • Endothelial dysfunction is a key factor in the progression of cardiovascular disease.

Purpose of the Study:

  • To evaluate endothelial function in patients with CAD and impaired glucose tolerance after percutaneous coronary intervention (PCI).
  • To investigate the association between endothelial function and traditional coronary risk factors in PCI-treated patients.

Main Methods:

  • Positron emission tomography with N-13 ammonia was used to measure myocardial blood flow (MBF) at rest and during a cold pressor test (CPT).
  • Endothelial function was assessed as the percent increase (%increase) in MBF during CPT.
  • MBF response was compared between normal, PCI-treated, and non-PCI segments.
  • Correlations between %increase in MBF and major risk factors were analyzed.

Main Results:

  • The cold pressor test induced a significant increase in MBF across all evaluated segments.
  • Endothelial function, measured as %increase in MBF, was preserved in PCI-treated segments (26% ± 23%) compared to normal segments (33% ± 22%).
  • Significant negative correlations were observed between %increase in MBF and fasting blood sugar, HbA1c, total cholesterol, triglycerides, and LDL cholesterol in non-PCI segments.

Conclusions:

  • Patients with CAD and impaired glucose tolerance undergoing PCI demonstrate preserved endothelial function in treated segments.
  • Coronary risk factors significantly correlate with impaired endothelial function in non-PCI segments of CAD patients.
  • These findings suggest that traditional risk factors may continue to affect non-intervened coronary lesions even after successful PCI.
Abstract

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