ABSTRACT
Acute rheumatic fever (ARF) is a multisystem, autoimmune, connective tissue disease and it’s holding heart, joints, brain, skin and subcutaneous tissue. Acute rheumatic fever is a well known nonsuppurative complication of group A beta-hemolytic streptococcal pharyngitis. Different kinds of rhythm and conduction disturbances may be seen during the course of acute rheumatic fever, one of the most frequently seen disorder being the first degree atrioventricular block. These rhythm and conduction disturbances are usually treated in the acute phase. This case report is about a 9-year-old male patient, diagnosed as ARF based on polyarthritis and carditis who also developed prolonged second-degree heart block.