J Korean Soc Endocrinol.  2006 Jun;21(3):233-238. 10.3803/jkes.2006.21.3.233.

A Case of Hyperthyroidism with Complete Atrioventricular Block and Cardiac Arrest

  • 1Department of Internal Medicine, Dong Kang General Hospital, Korea.


The cardiovascular manifestations of hyperthyroidism are sinus tachycardia, paroxysmal supraventricular tachycardia, atrial fibrillation, atrial flutter, atrioventricular block, bundle branch block, angina pectoris, heart failure, and cardiomyopathy. Though complete atrioventricular block is rare, it is important to recognize it in clinical practice because of the possibility of cardiac arrest. We experienced a 47-year-old female patient who had hyperthyroidism with complete atrioventricular block and developed cardiac arrest despite the initiation of an antithyroid drug. We could resuscitate successfully and inserted a temporary pacemaker, but eventually a permanent pacemaker was needed to prevent the recurrence of cardiac arrest. We report a rare case of complete atrioventricular block and cardiac arrest associated with hyperthyroidism with the review of references.

MeSH Terms

Angina Pectoris
Atrial Fibrillation
Atrial Flutter
Atrioventricular Block*
Bundle-Branch Block
Heart Arrest*
Heart Failure
Middle Aged
Tachycardia, Sinus
Tachycardia, Supraventricular


  • Fig. 1 Routine electrocardiography on the day of admission. Complete atrioventricular block with ventricular premature contractions can be noted.

  • Fig. 2 Electrocardiography on the time of cardiopulmonary resuscitation after cardiac arrest. Ventricular fibrillation and accelerated idioventricular rhythms were noted.

  • Fig. 3 Electrocardiography after insertion of temporary pacemaker.

  • Fig. 4 Electrocardiography after removal of the temporary pacemaker.


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