Causes for syncope are multifaceted. Hormonal etiology, specifically hypothyroidism, is associated with cardiac arrhythmias . Sinus bradycardia, low voltage, nonspecific T-wave changes and dissociative atrioventricular (AV) abnormalities are some of descriptive electrocardiographic features . In the majority of well know clinical presentations complete AV block requires the insertion of a permanent pacemaker. However hypothyroidism related bradycardia and consequential symptomatic AV blocks could be reversible with timely and proper management.
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