Delman, A J The artifically paced human heart. I. Ballistocardiographic correlations with the changing P-R intervals. [electronic resource] - The American journal of cardiology Apr 1966 - 504-8 p. digital Publication Type: Journal Article ISSN: 0002-9149 Standard No.: 10.1016/0002-9149(66)90240-2 doi Subjects--Topical Terms: BallistocardiographyHeart Block--therapyHumansPacemaker, Artificial