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DIASTOLIC MITRAL REGURGITATION DETECTED BY PULSED WAVE DOPPLER ECHOCARDIOGRAPHY AND COLOR FLOW DOPPLER MAPPING IN FIVE DOGS AND TWO CATS WITH SECOND‐ AND THIRD‐DEGREE ATRIOVENTRICULAR BLOCK
Author(s) -
Rosenthal Steven L.,
Fox Philip R.
Publication year - 1995
Publication title -
veterinary radiology and ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 1058-8183
DOI - 10.1111/j.1740-8261.1995.tb00237.x
Subject(s) - medicine , cardiology , diastole , mitral regurgitation , regurgitation (circulation) , doppler effect , doppler echocardiography , blood flow , atrioventricular valve , atrioventricular block , cats , mitral valve , blood pressure , ventricle , physics , astronomy
M‐mode echocardiography, color flow Doppler mapping, and pulsed wave Doppler echocardiography were used to characterize diastolic mitral regurgitation in five dogs and two cats with second‐ and third‐degree atrioventricular block. Incomplete closure and partial reopening of the mitral valve following nonconducted P‐waves were demonstrated by m‐mode echocardiography. Low velocity reflux of blood into the left atrium after nonconducted P‐waves was imaged by color‐flow Doppler mapping and spectral Doppler echocardiography. Late diastolic mitral regurgitation was not observed in clinically normal control dogs or cats, but a low velocity, mid‐diastolic flow reversal was detected in the dogs. This probably represented normal physiologic intravalvular flow. Diastolic mitral regurgitation is a common echocardiographic finding, in dogs and cats with, second‐ and third‐degree atrioventricular block.