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Updated: Aug 16, 2025

Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
Published on: October 14, 2016
Risk factors, clinical features, and outcomes of premature acute myocardial infarction
Qi Liu1, Rui-Juan Shi1, Yi-Man Zhang1
1Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China.
Insights
Premature acute myocardial infarction (AMI) is linked to unhealthy lifestyles. Despite this, premature AMI patients showed better survival rates than older patients, but poor prognosis was predicted by low LVEF, high NT-proBNP, and in-hospital MACCEs.
Area of Science:
- Cardiology
- Public Health
- Epidemiology
Background:
- Premature acute myocardial infarction (AMI) affects younger individuals, often linked to lifestyle factors.
- Understanding risk factors and prognosis in premature AMI is crucial for targeted interventions.
Purpose of the Study:
- To investigate risk factors, clinical features, and prognostic factors of premature AMI.
- To compare outcomes between premature and non-premature AMI patients.
Main Methods:
- Retrospective cohort study of 8,942 AMI patients (2011-2019).
- Premature AMI defined as < 55 years (men) and < 65 years (women).
- Data collected on demographics, lab tests, ECG, cardiac ultrasound, coronary angiography; primary endpoint: all-cause death.
Main Results:
- 2,513 (28.1%) cases were premature AMI, predominantly male (79.8%).
- Premature AMI group had higher prevalence of smoking, dyslipidemia, overweight, obesity, and family history of CHD.
- Premature AMI patients had significantly better survival rates (HR 0.27) over 4.6 years follow-up.
- Low LVEF (aHR 3.00), peak NT-proBNP (aHR 1.34), and in-hospital MACCEs (aHR 2.36) predicted poor prognosis.
Conclusions:
- Younger AMI patients exhibit risk factors like smoking, dyslipidemia, and obesity.
- Low LVEF, elevated NT-proBNP, and in-hospital MACCEs are predictors of poor prognosis in premature AMI.
Aims:
To investigate the risk factors, clinical features, and prognostic factors of patients with premature acute myocardial infarction (AMI).
Materials And Methods:
A retrospective cohort study of patients with AMI included in data from the West China Hospital of Sichuan University from 2011 to 2019 was divided into premature AMI (aged < 55 years in men and < 65 years in women) and non-premature AMI. Patients' demographics, laboratory tests, Electrocardiography (ECG), cardiac ultrasound, and coronary angiography reports were collected. All-cause death after incident premature MI was enumerated as the primary endpoint.
Results:
Among all 8,942 AMI cases, 2,513 were premature AMI (79.8% men). Compared to the non-premature AMI group, risk factors such as smoking, dyslipidemia, overweight, obesity, and a family history of coronary heart disease (CHD) were more prevalent in the premature AMI group. The cumulative survival rate of patients in the premature AMI group was significantly better than the non-premature AMI group during a mean follow-up of 4.6 years (HR = 0.27, 95% CI 0.22-0.32, p < 0.001). Low left ventricular ejection fraction (LVEF) (Adjusted HR 3.00, 95% CI 1.85-4.88, P < 0.001), peak N-terminal pro-B-type natriuretic peptide (NT-proBNP) level (Adjusted HR 1.34, 95% CI 1.18-1.52, P < 0.001) and the occurrence of in-hospital major adverse cardiovascular and cerebrovascular events (MACCEs) (Adjusted HR 2.36, 95% CI 1.45-3.85, P = 0.001) were predictors of poor prognosis in premature AMI patients.
Conclusion:
AMI in young patients is associated with unhealthy lifestyles such as smoking, dyslipidemia, and obesity. Low LVEF, elevated NT-proBNP peak level, and the occurrence of in-hospital MACCEs were predictors of poor prognosis in premature AMI patients.
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