LOCALIZATION OF THE AORTIC VALVE BY INTRACAVITARY ELECTROCARDIOGRAPHY.
D000293:Adolescent; D001021:Aortic Valve; D001024:Aortic Valve Stenosis; D006328:Cardiac Catheterization; D002648:Child; D004562:Electrocardiography; D006343:Heart Septal Defects; D006345:Heart Septal Defects, Ventricular; D006801:Humans; D008944:Mitral Valve Insufficiency; D008946:Mitral Valve Stenosis
ADOLESCENCE; AORTIC VALVE STENOSIS; CHILD; ELECTROCARDIOGRAPHY; HEART CATHETERIZATION; HEART SEPTAL DEFECTS, VENTRICULAR; MITRAL VALVE INSUFFICIENCY; MITRAL VALVE STENOSIS