Complete auriculoventricular block in myxedema with reversion to normal sinus rhythm on thyroid therapy

1. 1. The electrocardiographic findings of myxedema heart have been reviewed. These are, briefly: (a) low voltage of all complexes, (b) flattening and inversion of the T waves, and (c) reversion toward normal on thyroid therapy. 2. 2. The various arrhythmias and disturbances in auriculoventricular conduction associated with myxedema heart are mentioned. 3. 3. A case of complete auriculoventricular block with reversion to normal on thyroid therapy is reported. 4. 4. Possible etiologic factors for the above changes are discussed.