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Thyrotoxic periodic paralysis with hypokalemia (ECG)

Electrocardiogram of an adolescent in the setting of thyrotoxic periodic paralysis with hypokalemia (1.7 mEq/L), showing sinus tachycardia (110 beats per minute), inverted T wave (green arrow), and prominent U wave (red arrow). (Source: Yoon SH, Raza H. Thyrotoxic periodic paralysis: the peril of potassium replacement. Cureus 2022;14[12]:e32926. 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