Glycemic control and coronary plaque characteristics in patients with acute myocardial infarction

Area of Science:

• Cardiology
• Endocrinology
• Vascular Biology

Background:

• The relationship between glycemic control and non-culprit lesion (NCL) morphology in acute myocardial infarction (AMI) patients is not well understood.
• Understanding this link is crucial for predicting cardiovascular events.

Purpose of the Study:

• To investigate the association between glycemic control, assessed by glycated hemoglobin (HbA1c) levels, and the morphological characteristics of NCLs in AMI patients.
• To determine if poor glycemic control is an independent predictor of vulnerable plaque features in NCLs.

Main Methods:

• 800 AMI patients were stratified into three groups based on HbA1c levels: poorly controlled diabetes mellitus (DM) (≥8.0%), well-controlled DM (6.5%–8.0%), and non-DM (<6.5%).
• Optical Coherence Tomography (OCT) was used to assess plaque characteristics in NCLs at both patient and lesion levels, identifying high-risk features.
• Multivariate analyses were performed to identify independent predictors of vulnerable plaque features.

Main Results:

• Patients with poorly controlled DM exhibited significantly higher NCL vulnerability compared to well-controlled DM and non-DM groups.
• Vulnerable plaque features, including thin-cap fibroatheroma (TCFA) and non-culprit plaque rupture (PR), were more prevalent in patients with higher HbA1c levels.
• Poorly controlled DM was identified as an independent predictor of TCFA and microchannels at the patient level, and TCFA and non-culprit PR at the lesion level.

Conclusions:

• Poor glycemic control is significantly associated with increased NCL vulnerability in AMI patients.
• Increasing HbA1c levels correlate with worsening plaque characteristics, including greater plaque burden and more advanced vulnerability features.
• These findings highlight the importance of glycemic management in mitigating cardiovascular risk in AMI patients.