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Coronary microvascular dysfunction and inflammation: Insights from the Coronary Microvascular Disease Registry

Ilan Merdler1, Kalyan R Chitturi1, Abhishek Chaturvedi1

  • 1Section of Interventional Cardiology, MedStar Washington Hospital Center, Washington, DC, United States of America.

Cardiovascular Revascularization Medicine : Including Molecular Interventions
|May 24, 2024
PubMed

Insights

Coronary microvascular dysfunction (CMD) was not found to be associated with common inflammation markers like NLR, EMR, or MHR in patients with angina. This study indicates no significant link between these CBC-based inflammatory markers and CMD.

Area of Science:

  • Cardiology
  • Inflammation Research
  • Hematology

Background:

  • Coronary microvascular dysfunction (CMD) is linked to inflammatory conditions and endothelial dysfunction.
  • Investigating simple inflammatory markers from complete blood count (CBC) analysis is crucial for understanding CMD.
  • This study explores the relationship between CMD and common CBC-derived inflammatory markers.

Purpose of the Study:

  • To investigate the association between coronary microvascular dysfunction (CMD) and inflammation.
  • To evaluate common inflammatory markers, including neutrophil-to-lymphocyte ratio (NLR), eosinophil-to-monocyte ratio (EMR), and monocyte-to-high-density lipoprotein ratio (MHR), in patients with CMD.
  • To determine if these CBC-based biomarkers correlate with CMD in patients presenting with angina and non-obstructive coronary arteries.

Main Methods:

  • Data from the Coronary Microvascular Disease Registry was analyzed.
  • The study included patients with angina and non-obstructive coronary arteries who underwent invasive physiological assessments for CMD.
  • Neutrophil-to-lymphocyte ratio (NLR), eosinophil-to-monocyte ratio (EMR), and monocyte-to-high-density lipoprotein ratio (MHR) were examined in 171 patients (126 CMD-negative, 45 CMD-positive).

Main Results:

  • No significant differences in baseline characteristics, cardiovascular risk factors, or anti-inflammatory medications were observed between CMD-positive and CMD-negative groups.
  • Statistically, there were no significant differences in NLR (p=0.97), EMR (p=0.31), or MHR (p=0.54) between the two groups.
  • The findings suggest a lack of correlation between these specific CBC-based inflammatory markers and the presence of CMD.

Conclusions:

  • The study found no significant association between coronary microvascular dysfunction (CMD) and simple CBC-based inflammatory biomarkers.
  • These findings do not support the use of NLR, EMR, or MHR as indicators of inflammation in patients with CMD.
  • Further research may be needed to explore other inflammatory pathways or markers related to CMD.
Abstract

Keywords:
Coronary microvascular dysfunctionHemodynamic assessmentInflammationStable anginaangina with no obstructive coronary artery disease

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