Radiographic features of cardiogenic pulmonary edema in dogs with mitral regurgitation: 61 cases (1998-2007).
OBJECTIVE
To evaluate radiographic distribution of pulmonary edema (PE) in dogs with mitral regurgitation (MR) and investigate the association between location of radiographic findings and direction of the mitral regurgitant jet (MRJ).


METHODS
Retrospective case series.


METHODS
61 dogs with cardiogenic PE and MR resulting from mitral valve disease (MVD; 51 dogs), dilated cardiomyopathy (9), and hypertrophic cardiomyopathy (1).


METHODS
Thoracic radiographs of dogs with Doppler echocardiographic evidence of MR were reviewed for location (diffuse, perihilar, or focal) of PE. Also, direction (central or eccentric) of the MRJ, as evaluated by Doppler color flow mapping (DCFM), and distribution (symmetric or asymmetric) of radiographic findings were evaluated.


RESULTS
Diffuse, perihilar, and focal increases in pulmonary opacity were observed in 11 (18.0%), 7 (11.5%), and 43 (70.5%) of 61 dogs, respectively. Radiographic evidence of asymmetric PE in a single lung lobe or 2 ipsilateral lobes was found in 21 dogs, with involvement of only the right caudal lung lobe in 17 dogs. Doppler color flow mapping of the MRJ was available for 46 dogs. Of 31 dogs with a central MRJ, 28 had radiographic findings indicative of symmetric PE. Of 15 dogs with eccentric MRJ, 11 had radiographic evidence of asymmetric PE, and all of these dogs had MVD.


CONCLUSIONS
In dogs with cardiogenic PE, a symmetric radiographic distribution of increased pulmonary opacity was predominantly associated with a central MRJ, whereas an asymmetric radiographic distribution was usually associated with eccentric MRJ, especially in dogs with MVD.
Diana
Alessia
A
Department of Veterinary Clinical Sciences, Alma Mater Studiorum-University of Bologna, Ozzano Emilia, Italy. alessia.diana@unibo.it
Guglielmini
Carlo
C
Pivetta
Mauro
M
Sanacore
Antonina
A
Di Tommaso
Morena
M
Lord
Peter F
PF
Cipone
Mario
M
D000818:Animals; D004283:Dog Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D004285:Dogs; D005260:Female; D008297:Male; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D011654:Pulmonary Edema / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D011859:Radiography; D012189:Retrospective Studies