Optical coherence tomography and C-reactive protein in risk stratification of acute coronary syndromes

Area of Science:

• Cardiology
• Biomarkers
• Medical Imaging

Background:

• High C-reactive protein (CRP) levels in acute coronary syndrome (ACS) patients correlate with increased risk of future ischemic events.
• However, CRP alone has low positive predictive value for guiding specific treatments.
• Identifying high-risk ACS subsets for targeted anti-inflammatory therapy is crucial.

Purpose of the Study:

• To identify a high-risk ACS patient subset who could benefit from anti-inflammatory treatment.
• To evaluate the combined predictive value of CRP serum levels and optical coherence tomography (OCT) findings.
• To assess the association between OCT-derived plaque characteristics and recurrent ACS.

Main Methods:

• Patients admitted for ACS with pre-interventional OCT of the culprit vessel were selected from a hospital registry.
• Recurrent ACS (re-ACS) was the primary endpoint, with follow-up at 3 years.
• CRP levels ≥2 mg/L were considered abnormal; OCT high-risk features were analyzed.

Main Results:

• The study included 156 patients, with a 3-year re-ACS rate of 23%.
• Independent predictors of re-ACS included high CRP, plaque rupture, macrophage infiltration, and multifocal atherosclerosis.
• Patients with both high CRP and all OCT high-risk features had a 100% re-ACS rate, while those with low CRP and no OCT high-risk features had a low re-ACS rate (4/82).

Conclusions:

• The combination of systemic inflammation markers (CRP) and OCT findings effectively identifies very high-risk ACS patients.
• This integrated approach may refine risk stratification in ACS.
• Further research is needed to confirm these findings and evaluate anti-inflammatory treatment efficacy in this specific patient group.