JANTON, O H Mitral commissurotomy in the older aged patient. An analysis of twenty patients over the age of fifty. [electronic resource] - Circulation Sep 1953 - 321-7 p. digital Publication Type: Journal Article ISSN: 0009-7322 Standard No.: 10.1161/01.cir.8.3.321 doi Subjects--Topical Terms: Heart ValvesHumansMitral Valve Stenosis--surgery