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Thyrotoxic periodic paralysis complicated by syncope: sinus bradycardia (ECG)

Initial electrocardiogram of a 22-year-old man with thyrotoxic periodic paralysis during an episode complicated by syncope. The electrocardiogram shows sinus bradycardia (55 bpm) with incomplete right bundle branch block. (Source: Dosu A, Gupta M, Walsh O, Makan J. Thyrotoxic periodic paralysis: case presentation with tetraparesis and cardiac dysrhythmia. Cureus 2022;14[9]:e29759. Creative Commons Attribution [CC-BY 4.0] license,

Associated Disorders

  • Endocrine ophthalmopathy
  • Graves disease
  • Graves ophthalmopathy
  • Hashimoto thyroiditis
  • Hoffmann syndrome
  • Hyperthyroid myopathy
  • Hypothalamic dysfunction
  • Hypothyroid myopathy
  • Kocher-Debre-Semelaigne syndrome
  • Pituitary dysfunction
  • Thyroid-associated ophthalmopathy
  • Thyrotoxic myopathy
  • Thyrotoxic ocular myopathy