2002
DOI: 10.1892/0891-6640(2002)016<0547:drvooa>2.3.co;2
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Dynamic Right Ventricular Outflow Obstruction: A New Cause of Systolic Murmurs in Cats

Abstract: We have identified and characterized a new cause of variable parasternal systolic murmurs in cats. Color Doppler echocardiography of 51 cats presented for evaluation of a cardiac murmur demonstrated a localized, turbulent systolic jet located within the right ventricular (RV) outflow region, originating just cranial to the tricuspid valve. Spectral Doppler tracings of the turbulent jets showed abnormally high peak velocity, late systolic flow acceleration, and marked variability with heart rate, typical of dyn… Show more

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Cited by 21 publications
(30 citation statements)
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“…The sensitivity and specificity of auscultation in detecting cardiac disease in cats is compromised by the absence of auscultatory abnormalities in many cats with HCM, especially those with mild to moderate disease, and the occasional presence of a physiologic murmur, most commonly due to dynamic right ventricular outflow tract obstruction, in cats. 5,6 The sensitivity of thoracic radiography for diagnosing even severe HCM in cats is limited due to the concentric nature of the left ventricular hypertrophy coupled with the more cranial location of the left atrium in cats when compared to dogs. 3 In addition, the specificity of thoracic radiography for HCM is very poor.…”
Section: Introductionmentioning
confidence: 99%
“…The sensitivity and specificity of auscultation in detecting cardiac disease in cats is compromised by the absence of auscultatory abnormalities in many cats with HCM, especially those with mild to moderate disease, and the occasional presence of a physiologic murmur, most commonly due to dynamic right ventricular outflow tract obstruction, in cats. 5,6 The sensitivity of thoracic radiography for diagnosing even severe HCM in cats is limited due to the concentric nature of the left ventricular hypertrophy coupled with the more cranial location of the left atrium in cats when compared to dogs. 3 In addition, the specificity of thoracic radiography for HCM is very poor.…”
Section: Introductionmentioning
confidence: 99%
“…In contrast, such a drastic symptom was not observed in cats with asymptomatic HCM. Cardiac murmur due to outflow obstruction or systolic anterior motion (SAM) of the mitral valve is not always heard in cats with asymptomatic HCM [4,16,17]. The ability of thoracic radiography to detect ventricular hypertrophy is very low [12,17].…”
mentioning
confidence: 99%
“…Systolic murmurs, grade I-III/VI, the intensity of which varies with heart rate and gallop rhythm, attributed to dynamic left or right ventricular outflow tract obstruction and rapid ventricular filling respectively, are often auscultated (Broussard et al, 1995;Rishniw and Thomas, 2002;Peterson, 2013).…”
Section: Cardiovascular Manifestationsmentioning
confidence: 99%