Lattanzi, F In vitro identification of different degrees of mitral valve disease by online evaluation of radiofrequency ultrasound signal. [electronic resource] - Cardiovascular research Nov 1987 - 841-6 p. digital Publication Type: Journal Article ISSN: 0008-6363 Standard No.: 10.1093/cvr/21.11.841 doi Subjects--Topical Terms: Calcinosis--diagnosisFibrosisHeart Valve Diseases--diagnosisHumansMicrocomputersMitral Valve--anatomy & histologyRadiographyUltrasonography