Content continues after advertisement

Imaging of Myxomatous Valvular Disease

Sandra P. Tou, DVM, Diplomate ACVIM (Internal Medicine), & Bruce W. Keene, DVM, MS, Diplomate ACVIM (Cardiology)

Cardiology

|
May 2010
|
Peer Reviewed

Sign in to Print/View PDF

Myxomatous valvular degeneration (MVD) or endocardiosis is the most common acquired heart disease in dogs. MVD usually affects the mitral valve, and auscultation typically reveals a holosystolic murmur that is heard best at the left apex. Although a rough correlation has been found between murmur intensity and MVD severity in the Cavalier King Charles spaniel,1 severity of mitral regurgitation should not be assessed by murmur intensity alone.

Many factors influence regurgitant murmur intensity, including the pressure difference between the ventricle and the atrium; size, shape, and location of the regurgitant orifice; direction of the regurgitant jet; blood viscosity; size, shape, and contractility of the left ventricle; and the sound transmittng characteristics of the lung and chest wall.

Although a diagnosis of MVD can frequently be based on signalment and murmur, evaluation of the severity of regurgitation should include thoracic radiography, echocardiography, or both.

References

For global readers, a calculator to convert laboratory values, dosages, and other measurements to SI units can be found here.

All Clinician's Brief content is reviewed for accuracy at the time of publication. Previously published content may not reflect recent developments in research and practice.

Material from Clinician's Brief may not be reproduced, distributed, or used in whole or in part without prior permission of Educational Concepts, LLC. For questions or inquiries please contact us.

Podcasts

Clinician's Brief:
The Podcast
Listen as host Alyssa Watson, DVM, talks with the authors of your favorite Clinician’s Brief articles. Dig deeper and explore the conversations behind the content here.
Clinician's Brief provides relevant diagnostic and treatment information for small animal practitioners. It has been ranked the #1 most essential publication by small animal veterinarians for 9 years.*

*2007-2017 PERQ and Essential Media Studies

© Educational Concepts, L.L.C. dba Brief Media ™ All Rights Reserved. Terms & Conditions | Privacy Policy | Acceptable Use Policy