title: Aortic valve replacement: the problem of the small aortic annulus.
mesh_terms: D000328:Adult; D001021:Aortic Valve / Q000033:anatomy & histology; D002648:Child; D002675:Child, Preschool; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods; D006801:Humans; D007223:Infant