Spain, M G Effect of isometric exercise on mitral and aortic regurgitation as assessed by color Doppler flow imaging. [electronic resource] - The American journal of cardiology Jan 1990 - 78-83 p. digital Publication Type: Journal Article ISSN: 0002-9149 Standard No.: 10.1016/0002-9149(90)90029-z doi Subjects--Topical Terms: Aortic Valve Insufficiency--diagnosisBlood Pressure--physiologyEchocardiography, DopplerExercise--physiologyFemaleHeart Rate--physiologyHumansMaleMiddle AgedMitral Valve Insufficiency--diagnosis