Quinones, M A Influence of acute changes in preload, afterload, contractile state and heart rate on ejection and isovolumic indices of myocardial contractility in man. [electronic resource] - Circulation Feb 1976 - 293-302 p. digital Publication Type: Journal Article ISSN: 0009-7322 Standard No.: 10.1161/01.cir.53.2.293 doi Subjects--Topical Terms: Cardiac OutputEchocardiographyHeart RateHumansMyocardial Contraction