First myocardial infarction: age and ejection fraction identify a low-risk group

Area of Science:

• Cardiology
• Clinical Medicine
• Public Health

Background:

• Myocardial infarction (MI) is a leading cause of cardiac mortality.
• Identifying patients at high risk for 1-year cardiac death post-MI is crucial for targeted interventions.
• Predictive factors for mortality after a first MI require further investigation.

Purpose of the Study:

• To identify factors associated with 1-year cardiac mortality in patients discharged alive after their first myocardial infarction (MI).
• To stratify risk based on age and left ventricular ejection fraction (LVEF) to identify low-risk patient groups.

Main Methods:

• Multivariate analysis of variables at hospital discharge in 2089 patients with a first MI.
• Stratification of patients into age subsets (≤50, 51-70, >70 years) and LVEF groups (≤0.40, 0.41-0.50, >0.50).

Main Results:

• Age and LVEF were the most significant predictors of 1-year cardiac mortality.
• Patients <50 years with LVEF >0.40 and patients 51-70 years with LVEF >0.50 had a low mortality risk (1.2%).
• Patients >70 years had high mortality (22.2%), while other younger patients had 7.4% mortality.

Conclusions:

• Left ventricular ejection fraction (LVEF) alone can identify a significant low-risk group among first MI patients.
• Risk stratification using age and LVEF can guide post-MI management and resource allocation.
• Early identification of low-risk patients can improve outcomes and reduce healthcare burden.