<prompt> Least common valve involved in rheumatic fever isAoic valveTricuspid valveMitral valvePulmonary valve  <response>: Endocarditis in rheumatic feverMitral valve involved almost all the cases of Acute Rheumatic FeverAlmost 25 of MR is associated with aoic regurgitationTricuspid regurgitation is seen in 10-30 of casesPulmonary valve involvement is never seenRefer: Nelsons Textbook of Pediatrics, SAE, 1st edition, pg no. 1333 - 1335 