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Diagnostic testing in acute myocardial infarction: does patient age influence utilization patterns? The Worcester
J H Gurwitz1, V Osganian, R J Goldberg
1Department of Medicine, Beth Israel Hospital, Boston, MA.
Insights
Older patients hospitalized for acute myocardial infarction (AMI) received less diagnostic testing, including exercise tests and coronary arteriography, regardless of their health status. This age-related disparity in diagnostic care warrants further investigation.
Area of Science:
- Cardiology
- Geriatric Medicine
- Health Services Research
Background:
- Patient age is a critical factor in healthcare decisions, yet its specific impact on diagnostic testing for acute myocardial infarction (AMI) requires detailed examination.
- Older adults often present with complex comorbidities that may influence diagnostic and treatment pathways.
Purpose of the Study:
- To evaluate how patient age influences the utilization of diagnostic tests in the management of acute myocardial infarction (AMI).
- To identify potential age-based disparities in diagnostic testing patterns for AMI patients.
Main Methods:
- Retrospective review of hospital charts for 4,109 patients hospitalized with validated AMI between 1975 and 1986 in the Worcester, Massachusetts metropolitan area.
- Analysis of demographic, clinical characteristics, in-hospital mortality, and utilization of specific diagnostic tests (Holter monitoring, radionuclide ventriculography, echocardiography, exercise testing, pulmonary artery catheterization, coronary arteriography).
- Statistical adjustment for differences in patient characteristics and mortality to isolate the effect of age.
Main Results:
- Older patients (≥65 years) were less likely to undergo exercise testing compared to younger patients (<55 years), even after adjusting for clinical factors.
- Very elderly patients (>75 years) showed significantly lower utilization rates for radionuclide ventriculography, pulmonary artery catheterization, and coronary arteriography.
- In-hospital mortality increased with advancing age, and older patients had a higher likelihood of recurrent, anterior, non-Q wave AMIs complicated by heart failure and shock.
Conclusions:
- Chronologic age appears to be an independent determinant of diagnostic testing utilization in patients hospitalized for acute myocardial infarction.
- These findings highlight a potential age-related bias in diagnostic care for AMI, suggesting a need for prospective studies.
- Future research should incorporate functional status and noncardiovascular comorbidities to fully understand decision-making in AMI management for older adults.
Abstract:
To assess the impact of patient age on the use of diagnostic testing in the management of acute myocardial infarction, the authors reviewed the hospital charts of 4,109 patients hospitalized for validated acute myocardial infarction in the Worcester, Massachusetts, metropolitan area during selected years between 1975 and 1986. Older patients were more likely to be female and to have a prior history of angina, hypertension, and diabetes mellitus (p less than 0.001). Acute myocardial infarctions among older patients were more likely to be recurrent, anterior in location, non-Q wave, smaller as reflected by peak creatine kinase levels, and complicated by congestive heart failure, cardiogenic shock, and atrial fibrillation (p less than 0.001). In-hospital mortality was directly related to increasing patient age (p less than 0.001). Patterns of utilization of the following diagnostic tests were examined: Holter monitoring, radionuclide ventriculography, echocardiography, exercise testing, pulmonary artery catheterization, and coronary arteriography. After adjustment for differences in demographic and clinical characteristics and in-hospital mortality, patients aged 65 years and older were significantly less likely to undergo exercise testing than were patients less than age 55. Patients older than age 75 were significantly less likely to undergo radionuclide ventriculography, pulmonary artery catheterization, and coronary arteriography than were younger patients. Sex-specific analyses did not produce results substantially different from those for the overall study population. The results of this community-wide study suggest that among patients hospitalized for acute myocardial infarction, chronologic age may be an independent determinant of utilization patterns of diagnostic testing. These findings suggest the need for a prospective evaluation of this issue, with an additional emphasis placed on the contributions of functional status and noncardiovascular illness to decision-making in the clinical management of acute myocardial infarction patients.