Pathology of the vulnerable plaque

Area of Science:

• Cardiovascular Pathology
• Interventional Cardiology
• Biomarkers of Atherosclerosis

Background:

• Acute coronary syndromes (ACS) result from coronary thrombosis, primarily plaque rupture or erosion.
• Thin cap fibroatheroma (TCFA) is a non-thrombosed lesion resembling acute plaque rupture.
• Recognizing ACS precursor lesions is crucial for advancing coronary disease treatment.

Purpose of the Study:

• To characterize the thin cap fibroatheroma (TCFA) as a precursor lesion for acute coronary syndromes (ACS).
• To identify the prevalence and characteristics of TCFAs in relation to ACS.
• To explore the potential of TCFA identification in preventing sudden coronary death.

Main Methods:

• Histopathological analysis of coronary artery lesions in patients with ACS.
• Morphometric measurements of TCFA components (necrotic core, fibrous cap).
• Correlation of TCFA presence with clinical risk factors and arterial location.

Main Results:

• TCFAs, characterized by a thin fibrous cap (<65 microm) and necrotic core, are the primary precursor to plaque rupture in ACS.
• TCFAs are most prevalent in proximal coronary arteries and associated with positive remodeling, not severe stenosis.
• TCFAs are linked to high total cholesterol, elevated TC/HDL ratio, postmenopausal women, and high-sensitivity C-reactive protein levels.

Conclusions:

• Thin cap fibroatheroma (TCFA) is a critical precursor lesion for acute plaque rupture in acute coronary syndromes (ACS).
• TCFA identification in living patients offers a potential strategy to reduce sudden coronary death.
• Further research into TCFA detection and management is warranted for ACS prevention.