Toxic multinodular goiter electrocardiogram

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mazia Fatima, MBBS [2]

An ECG may be helpful in the diagnosis of hyperthyroidism due to toxic multinodular goiter.Findings on an ECG suggestive of hyperthyroidism due to include sinus tachycardia, higher voltage of P waves and T waves, elevated amplitude of QRS complex, prolonged P-Q and shortened Q-T intervals.

• An ECG may be helpful in the diagnosis of hyperthyroidism due to toxic multinodular goiter. Findings on an ECG suggestive of hyperthyroidism due to include:^[1]
  • Sinus tachycardia
  • Higher voltage of P and T waves
  • Elevated amplitude of QRS complex
  • Prolonged PQ interval
  • Shortened QT interval
  • Prolongation of QT interval

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