IMPERIAL, E S Electrocardiographic analysis of pure mitral valvular disease: a study based on fifty-seven cases with open-heart operation. [electronic resource] - American heart journal Nov 1960 - 705-15 p. digital Publication Type: Journal Article ISSN: 0002-8703 Standard No.: 10.1016/0002-8703(60)90353-7 doi Subjects--Topical Terms: DiseaseElectrocardiographyHeart DiseasesHeart Valve DiseasesHumansMitral ValveRheumatic Heart Disease