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[Clinical and prognostic implications of age in acute myocardial infarct]
J L Martínez Sande1, A Amaro Cendón, J R González Juanatey
1Servicio de Cardiología y de la Unidad Coronaria del Hospital General de Galicia, Santiago de Compostela, España.
Insights
Elderly patients experiencing acute myocardial infarction face higher early mortality rates due to increased heart failure and cardiogenic shock. Age and severe pump failure are key predictors of death in this demographic.
Area of Science:
- Cardiology
- Geriatric Medicine
- Clinical Research
Background:
- Acute myocardial infarction (AMI) presents unique challenges in the geriatric population.
- Understanding risk factors for early mortality in elderly AMI patients is crucial for improving outcomes.
Purpose of the Study:
- To evaluate the clinical characteristics of AMI in geriatric patients.
- To identify factors associated with early mortality in elderly individuals following AMI.
Main Methods:
- Retrospective analysis of 814 patients with first AMI, comparing 401 geriatric patients (Group A, >65 years) with 413 younger patients (Group B).
- Utilized multivariate analysis (stepwise logistic regression) to determine independent predictors of early mortality.
Main Results:
- Geriatric patients had lower rates of males and smokers, but higher incidences of diabetes mellitus and arterial hypertension.
- AMI in the elderly was associated with significantly greater rates of heart failure, cardiogenic shock, and post-AMI angina.
- Early mortality (first month) was substantially higher in the geriatric group (22.7% vs. 6.3%).
- Cardiogenic shock, age, and heart failure were identified as independent predictors of early mortality.
Conclusions:
- Early mortality following AMI is significantly elevated in the geriatric population.
- Severe pump failure (heart failure, cardiogenic shock) and advanced age are primary drivers of early mortality in elderly AMI patients.
Abstract:
The purpose of this study was to evaluate the clinical characteristics and the factors related to early mortality in the acute myocardial infarction of the geriatric population. We studied 814 consecutive patients with their first acute myocardial infarction admitted to the coronary care unit at tha Hospital General de Galicia. 401 patients were older than 65 years (Group A) and 413 were younger (Group B). Group A was found a significantly lower percentage of males (64.7% versus 88.4%; p less than 0.001) and smokers (46.7% versus 72.7%; p less than 0.001; and older patients showed a greater incidence of diabetes mellitus (28.1% versus 15.2%; p less than 0.001) and arterial hypertension (45.6% versus 31.7%; p less than 0.01). In the geriatric population, the clinical course of the acute myocardial infarction is characterized by a greater incidence of heart failure (35.3% versus 11.1%; p less than 0.001), cardiogenic shock (18% versus 5.7%; p less than 0.001) and post-acute myocardial infarction angina pectoris (18.3% versus 12.2%; p less than 0.05). Early mortality (first month) was significantly higher in elderly patients (22.7% versus 6.3%; p less than 0.001). The multivariate analysis by stepwise logistic regression identified cardiogenic shock, age and heart failure as the only independent predictive variables for early mortality. We conclude that early mortality in the acute myocardial infarction is high and related to severe degrees of pump failure and age.