Second Degree A-V Block in Graves© Disease
Yoram Singer, Pesach Shvartzman
Dept. of Family Medicine, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba
Cardiac tachyarrhythmias are common in thyrotoxicosis. We report an uncommon case of a 53-year-old woman with Grave's disease who developed second degree A-V block while euthyroid on propylthiouracil. The most likely mechanism is an autoimmune response causing infiltration of the cardiac conduction pathways.