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Hyperthyroidism precipitating cardiac arrest in a patient with Brugada pattern
  1. Mohamed Elgara1,
  2. Mohammed Omer Khalil1 and
  3. Tasleem Raza2
  1. 1Internal Medicine, Hamad Medical Corporation, Doha, Qatar
  2. 2Critical care, Hamad Medical Corporation, Doha, Qatar
  1. Correspondence to Dr Mohamed Elgara; msg4u22001{at}


A 38-year-old man previously healthy suffered an out-of-hospital cardiac arrest; he was resuscitated successfully and admitted to the intensive care unit. His initial ECG suggested a Brugada pattern; other laboratory tests revealed low potassium level, low Thyroid Stimulating Hormone (TSH) and high FT4. He was started on carbimazole for hyperthyroidism, along with other supportive care. A comprehensive cardiac evaluation was done, including ajmaline and flecainide tests, results were inconclusive. An implantable cardioverter defibrillator device (ICD) was inserted to prevent such catastrophic events in the future. After discharge and on follow-up, our patient was doing well. His thyroid function test (TFT) was normal; moreover, a follow-up ICD interrogation did not record any arrhythmias. This case report highlighted asymptomatic hyperthyroidism as a precipitant for Brugada pattern resulting in sudden cardiac arrest.

  • hyperthyroidism
  • resuscitation
  • arrhythmias

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  • Contributors Patient was under the care of ME under direct supervision of TRM. Report was written by ME and MOK, supervised by TRM.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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