<prompt> Least common valve involved in rheumatic fever?Aoic valveTricuspid valveMitral valvePulmonary valve  <response>: Ans. is d i.e., Pulmonary valve Endocarditis in rneumatic fever Mitral valve involved almost all the cases of Acute Rheumatic Fever. Almost 25 of MR is asociated with aoic regargitation. Tricuspid regurgitation is seen in 10-30 cases. Pulmonary valve involvement is never seen. 