Discrete Subvalvular Aortic Stenosis: Severity of Aortic Regurgitation and Rate of Recurrence at Midterm Follow-Up after Surgery - Sadeghian, Hakimeh; Karimi, Abbasali; Ahmadi, Seyed Hosein; Lotfi-Tokaldany, Masoumeh; Fallah, Nader; Zavar, Reihaneh; Abbasi, Seyed Hesameddin (The Research in Heart Yield and Translational Medicine (RHYTHM))