Inflammation, Chronic Ulcerated Plaques, and Unstable Coronary Syndromes

Area of Science:

• Cardiovascular Pathology
• Inflammatory Disease Mechanisms

Background:

• Inflammation is a key factor in active atherosclerosis and plaque complications.
• Acute coronary events are often linked to plaque ulceration and thrombosis.
• Ulcerated plaques can exist chronically and asymptomatically for extended periods.

Purpose of the Study:

• To investigate the chronic nature of ulcerated plaques in atherosclerotic disease.
• To determine the association between ulcerated plaques, inflammation, and acute coronary events.
• To explore the potential of recognizing and treating ulcerated plaques for event prevention.

Main Methods:

• Histologic examination of coronary arteries from patients deceased from acute coronary disease.
• Analysis of clinical and pathological data correlating plaque characteristics with inflammation and clinical outcomes.

Main Results:

• Ulcerated plaques can be chronic, unrecognized lesions, existing for weeks to years.
• Patients with acute coronary disease frequently exhibit multiple plaques in various developmental stages, associated with inflammation.
• Inflammation consistently correlates with the presence of ulcerated plaques, indicating active atherosclerotic disease.

Conclusions:

• Ulcerated plaques are integral to active, inflammatory atherosclerotic disease.
• These plaques represent potentially unstable lesions due to exposed subendothelial collagen.
• Early recognition and treatment of chronic ulcerated plaques may prevent acute coronary syndromes by mitigating thrombotic risk.