title: [AMPLITUDE ANALYSIS AND FREQUENCY ANALYSIS STUDIES ON MITRAL OPENING TONE BEFORE AND AFTER COMMISSUROTOMY].
mesh_terms: D006348:Cardiac Surgical Procedures; D008946:Mitral Valve Stenosis; D010701:Phonocardiography; D012106:Research; D050812:Split-Brain Procedure; D013903:Thoracic Surgery
keywords: HEART SURGERY; MITRAL VALVE STENOSIS; PHONOCARDIOGRAPHY
vernacular_title: AMPLITUDEN- UND FREQUENZANALYTISCHE UNTERSUCHUNGEN DES MITRALOEFFNUNGSTONES VOR UND NACH KOMMISSUROTOMIE.