Stern, J Normal splitting of the second heart sound in significant valvular pulmonic stenosis. [electronic resource] - American heart journal Jul 1968 - 13-7 p. digital Publication Type: Journal Article ISSN: 0002-8703 Standard No.: 10.1016/0002-8703(68)90288-3 doi Subjects--Topical Terms: Cardiac CatheterizationChildChild, PreschoolFemaleHeart AuscultationHeart Ventricles--physiopathologyHemodynamicsHumansPhonocardiographyPulmonary Valve--physiopathologyPulmonary Valve Stenosis--diagnosisTime Factors