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[Right ventricular heart failure in hyperthyroidism].

R Raddino1, T M Scarabelli, R Ferrari

  • 1Cattedra di Cardiologia, Spedali Riuniti, Università degli Studi, Brescia, Italy.

Minerva Cardioangiologica
|September 5, 2001
PubMed
Summary
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Hyperthyroidism can cause heart problems, including heart failure. Prompt thyroid testing in heart failure patients may reveal reversible myocardial dysfunction in those with hyperthyroidism.

Area of Science:

  • Cardiology
  • Endocrinology

Background:

  • Cardiovascular complications are frequent in hyperthyroidism, involving increased heart rate, contractility, and cardiac index.
  • Triiodothyronine (T3) increases myocardial excitability, potentially leading to arrhythmias like atrial fibrillation.
  • Hyperthyroid-induced heart failure, though rare, can arise from pre-existing conditions or rapid heart rhythms.

Observation:

  • A young woman with Graves' disease presented with worsening dyspnea.
  • Clinical findings included sinus tachycardia, an S1Q3 electrocardiographic pattern, and echocardiographic evidence of right ventricular overload, pulmonary hypertension, and venous congestion, mimicking acute pulmonary embolism.
  • These symptoms resolved rapidly following antithyroid treatment.

Findings:

  • The case highlights a rare presentation of Graves' disease mimicking acute pulmonary embolism.

Related Experiment Videos

  • Isolated right ventricular dysfunction was observed and proved reversible with antithyroid therapy.

    • Implications:

    • Testing thyroid function in patients with unexplained heart failure is crucial for identifying hyperthyroid individuals.
    • Early diagnosis and treatment of hyperthyroidism can reverse myocardial dysfunction, improving patient outcomes.