Endocrine Abstracts

Cardiac arrhythmias in thyrotoxicosis are usually seen as sinus tachycardia and atrial fibrillation but conduction abnormalities in the form of heart blocks do occur in rare instances. We present here four hyperthyroid patients with complete heart blocks. Cases 1 and 2 are young women diagnosed with Graves’ disease who both experienced syncope and were seen to have 3rd degree atrio-ventricular block. Case 3 is a young woman who presented with palpitations, fever and short...