ABSTRACT The essential goal of this study was to idendify the prevalence of hyperthyroidism in atrial fibrillation (AF), and interrelation to sex and age. The study was sequentiol and the method was requesting TFT in 100 patients with AF Seeking medical attention in Iran Medical Siences University Hospitals. These tests constitute of TSH, T4, T3 RUP (ELISA method). In 100 patients of AF 14 case...