Kitabatake, A Current development in Doppler echocardiography. The real-time two-dimensional Doppler flow imaging system. [electronic resource] - Medical progress through technology 1987 - 87-99 p. digital Publication Type: Journal Article ISSN: 0047-6552 Subjects--Topical Terms: Coronary CirculationDoppler EffectEchocardiography--instrumentationHeart--physiologyHeart Defects, Congenital--diagnosisHeart Diseases--diagnosisHumans