MITRAL VALVOTOMY IN  YOUNG PATIENTS.
D000293:Adolescent; D000787:Angina Pectoris; D001281:Atrial Fibrillation; D006348:Cardiac Surgical Procedures; D002648:Child; D004562:Electrocardiography; D004617:Embolism; D006333:Heart Failure; D006349:Heart Valve Diseases; D006469:Hemoptysis; D006801:Humans; D007223:Infant; D008943:Mitral Valve; D008946:Mitral Valve Stenosis; D013902:Radiography, Thoracic; D013903:Thoracic Surgery
ADOLESCENCE; ANGINA PECTORIS; AURICULAR FIBRILLATION; CHILD; ELECTROCARDIOGRAPHY; EMBOLISM; HEART FAILURE, CONGESTIVE; HEART SURGERY; HEART VALVE DISEASES; HEMOPTYSIS; INFANT; MITRAL VALVE; MITRAL VALVE STENOSIS; THORACIC RADIOGRAPHY