Levitsky, S Experimental and early clinical evaluation of heart tracking (radarkymography) as a noninvasive method for measuring myocardial contractility. [electronic resource] - The American journal of cardiology Aug 1973 - 156-61 p. digital Publication Type: Journal Article ISSN: 0002-9149 Standard No.: 10.1016/s0002-9149(73)80114-6 doi Subjects--Topical Terms: Analog-Digital ConversionAnimalsAortaBlood Flow VelocityBlood PressureCardiac OutputCardiac VolumeComputers, HybridDogsElectrocardiographyFluoroscopyHeart--drug effectsHeart Failure--physiopathologyHeart RateHeart Ventricles--physiopathologyHumansIsoproterenol--pharmacologyKymographyPropranolol--pharmacologyRespirationTape RecordingTelevision