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Myocardial infarction and stroke.

M S Komrad, C E Coffey, K S Coffey

    Neurology
    |November 1, 1984
    PubMed
    Summary
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    Patients experiencing myocardial infarction face a higher risk of stroke, particularly involving the anterior circulation. Atrial arrhythmia is a key risk factor, and stroke significantly increases hospital mortality.

    Area of Science:

    • Cardiology
    • Neurology
    • Clinical Medicine

    Background:

    • Myocardial infarction (MI) is a leading cause of morbidity and mortality.
    • Stroke is a serious complication that can occur during hospitalization for MI.
    • Understanding risk factors and outcomes of stroke in MI patients is crucial for improving care.

    Purpose of the Study:

    • To evaluate the incidence, characteristics, and risk factors of stroke in patients admitted with myocardial infarction.
    • To determine the impact of stroke on hospital mortality in acute myocardial infarction patients.

    Main Methods:

    • Retrospective analysis of a computer data bank.
    • Inclusion of 740 consecutive patients admitted to a cardiac care unit with myocardial infarction.
    • Evaluation of stroke occurrence, location, and associated clinical and pathological data.

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    Main Results:

    • Stroke occurred in 2.4% of patients, with 76% affecting the anterior circulation.
    • Hospital mortality was significantly higher in patients with stroke (61%) compared to those without (13%).
    • Atrial arrhythmia (p ≤ 0.03), cardiac pump failure, specific MI locations (apical, anterior-lateral), and prior stroke history were associated with increased stroke risk.

    Conclusions:

    • Stroke is a significant complication of acute myocardial infarction, associated with substantially increased mortality.
    • Atrial arrhythmia emerges as a key modifiable risk factor for stroke in this population.
    • Embolism is suggested as the primary etiology for most strokes complicating acute myocardial infarction.