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[Myocardial infarction in hyperthyroidism (author's transl)]

J Ortega Carnicer, A Font de Mora, J M Aguado Borruey

    Medicina Clinica
    |May 10, 1981
    PubMed
    Summary

    Untreated hyperthyroidism can lead to myocardial infarction, even without coronary artery disease. This rare association highlights potential mechanisms like vasospasm or direct thyroid hormone effects on heart oxygen demand.

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    Area of Science:

    • Cardiology
    • Endocrinology
    • Internal Medicine

    Background:

    • Hyperthyroidism is a known, though infrequent, risk factor for ischemic cardiomyopathy.
    • Thyroid hormone excess can impact cardiovascular function and oxygen consumption.

    Observation:

    • Report of three patients with untreated hyperthyroidism presenting with acute cardiac events.
    • Two young women experienced myocardial infarction without significant coronary artery lesions.
    • One male patient with a history of Prinzmetal's angina developed ventricular fibrillation.

    Findings:

    • The study emphasizes the infrequent but significant association between hyperthyroidism and myocardial infarction.
    • Possible mechanisms for coronary artery occlusion in hyperthyroidism include vasospasm, embolism, and direct hormonal effects.

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    Implications:

    • Clinicians should consider hyperthyroidism in the differential diagnosis of myocardial infarction, especially in younger patients or those with atypical presentations.
    • Further research into the direct cardiovascular effects of thyroid hormones may elucidate novel therapeutic targets.