title: Evaluation of a non-invasive technique to assess cardiac function. I. control and influence of some physical factors.
mesh_terms: D000818:Animals; D001013:Aorta, Thoracic / Q000502:physiology; D001450:Ballistocardiography / Q000379:methods*; D001783:Blood Flow Velocity; D001835:Body Weight; D004285:Dogs; D006321:Heart / Q000502:physiology*; D006439:Hemodynamics; D012149:Restraint, Physical