Clinical Background and Coronary Artery Lesions Characteristics in Japanese Patients With Acute Coronary Syndrome...

Area of Science:

• Cardiology
• Interventional Cardiology
• Atherosclerosis Research

Background:

• Predictive factors for major bleeding in acute coronary syndrome (ACS) patients are well-studied in Western populations, but less so in Japanese individuals, particularly regarding coronary lesion characteristics.
• Understanding these factors is crucial for improving patient outcomes and tailoring treatment strategies.

Purpose of the Study:

• To investigate the prognostic effect of major bleeding and identify predictive factors for bleeding in Japanese ACS patients.
• To specifically examine the influence of coronary lesion characteristics, assessed by optical coherence tomography (OCT), on major bleeding events.

Main Methods:

• A cohort of 1,840 Japanese ACS patients was divided into major bleeding and no-bleeding groups over a 2-year follow-up.
• A subgroup of 958 patients undergoing primary percutaneous coronary intervention (PCI) with OCT guidance were analyzed for lesion characteristics.
• Multivariate Cox proportional hazards analyses were used to identify independent predictors of major bleeding.

Main Results:

• Major bleeding occurred in 6.7% of patients, and was associated with significantly higher cardiovascular death rates (26.4% vs. 8.5%).
• OCT revealed a higher prevalence of disrupted fibrous cap (DFC) and calcified plaque in the bleeding group.
• DFC was identified as a significant predictor of major bleeding (HR 2.135).

Conclusions:

• Major bleeding in Japanese ACS patients is associated with adverse cardiac outcomes.
• Advanced atherosclerotic plaque characteristics, specifically disrupted fibrous caps, are significant predictors of major bleeding in this population.