The ubiquitous balloon.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000800:Angioplasty, Balloon / Q000379:methods*; D001024:Aortic Valve Stenosis / Q000628:therapy; D002648:Child; D006801:Humans; D008946:Mitral Valve Stenosis / Q000628:therapy; D011666:Pulmonary Valve Stenosis / Q000151:congenital / Q000628:therapy