CASSELS, D E The effect of exercise on left to right shunt of blood through a ventricular septal defect. [electronic resource] - Diseases of the chest Jul 1959 - 73-80 p. digital Publication Type: Journal Article ISSN: 0096-0217 Standard No.: 10.1378/chest.36.1.73 doi Subjects--Topical Terms: ExerciseHeart Defects, CongenitalHeart Septal DefectsHeart Septal Defects, VentricularHeart Septum--abnormalitiesHumans