title: The 'A-dip' of diastolic mitral regurgitation: an unusual Doppler flow pattern in a patient with severe aortic insufficiency and complete heart block.
abstract: This is an unusual case of diastolic mitral regurgitation (MR) with a high diastolic velocity jet and prolonged jet duration related to a combination of acute severe aortic insufficiency and high-degree atrioventricular block. This case illustrates an interesting hemodynamic phenomenon with multiple transient decreases in the pressure gradient between the left ventricle and left atrium during diastole related to a temporary increase in left atrial pressure associated with atrial contraction.
authors.affiliation: Department of Cardiology Echocardiography Laboratory, New York University Medical Center, 560 First Avenue, New York, NY 10016, USA.
authors.forename: Rachel Levine
authors.initials: RL
authors.lastname: Berger
authors.forename: Edward
authors.initials: E
authors.lastname: Katz
authors.forename: Paul
authors.initials: P
authors.lastname: Tunick
authors.forename: Itzhak
authors.initials: I
authors.lastname: Kronzon
mesh_terms: D000328:Adult; D001022:Aortic Valve Insufficiency / Q000150:complications*; D003971:Diastole; D015150:Echocardiography, Doppler; D006327:Heart Block / Q000150:complications*; D006801:Humans; D008297:Male; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging* / Q000209:etiology / Q000503:physiopathology*