[Acute coronary syndrome complicated by heart failure as predictor of long-term infarction]

Area of Science:

• Cardiology
• Clinical Medicine
• Cardiovascular Research

Context:

• Heart failure, indicated by Killip class > I, is a known predictor of mortality in acute coronary syndrome (ACS) patients.
• The association between early heart failure signs and the risk of subsequent acute ischemic events remains incompletely understood.
• Understanding this relationship is crucial for refining risk stratification and management strategies in ACS.

Purpose:

• To investigate the independent association between the presence of Killip class > I on admission and the risk of new acute myocardial infarction (AMI) in patients with ACS.
• To evaluate this risk in distinct ACS subgroups: non-ST-segment elevation ACS (Non-STE-ACS) and ST-segment elevation myocardial infarction (STEMI).

Summary:

• A prospective study of 1398 ACS survivors (Non-STE-ACS and STEMI) found that 15.6% and 21.3% presented with Killip class > I, respectively.
• Patients with Killip class > I experienced a significantly higher incidence of new AMIs during a median 3-year follow-up (28.3 vs. 6.3 per 100 patient-years for Non-STE-ACS; 10.6 vs. 3.3 for STEMI).
• Multivariate analysis, adjusted for traditional risk factors and accounting for competing events, confirmed that Killip class > I independently predicts a higher risk of long-term AMI in both Non-STE-ACS (HR: 1.76) and STEMI (HR: 1.90) patients.

Impact:

• The findings highlight Killip class > I as a critical, independent predictor of recurrent ischemic events in ACS patients.
• This stratification tool can aid clinicians in identifying high-risk individuals who may benefit from intensified secondary prevention strategies.
• The study underscores the importance of assessing heart failure severity on admission for comprehensive risk assessment in ACS management.