Balloon valvuloplasty in 30 dogs with pulmonic stenosis: effect of valve morphology and annular size on initial and 1-year outcome.
Case records of 30 dogs in which valvular pulmonic stenosis (PS) was treated by balloon dilation were reviewed retrospectively. Physical examination, thoracic radiographs, 9-lead ECG, echocardiography, and Doppler studies were performed in all dogs. Two-dimensional and Doppler echocardiography were repeated after 24 h and 1 year after treatment. Dogs were divided into 2 groups based on their valvular anatomy on echocardiography and aortic:pulmonary ratio: 18 had type A PS with normal annulus diameter and aortic:pulmonary ratio < or = 1.2, and 12 had type B PS with pulmonary annulus hypoplasia and aortic:pulmonary ratio > 1.2. Most dogs in the type B group were brachycephalic and had no poststenotic dilatation on thoracic radiographs. Of the dogs with type A stenosis, 100% survived valvuloplasty with resolution of clinical signs. At 1-year follow-up, 94.4% were still alive and remained asymptomatic. Of those with type B stenosis, 66.6% had favorable outcome postvalvuloplasty. At 1-year follow-up, 66.6% of dogs were alive, and resolution of clinical signs was obtained in 50%. This study revealed the immediate and long-term efficacy of balloon valvuloplasty in dogs with PS.
Bussadori
C
C
Clinica Veterinaria Gran Sasso, Milano, Italy.
DeMadron
E
E
Santilli
R A
RA
Borgarelli
M
M
D000818:Animals; D002404:Catheterization / Q000379:methods / Q000662:veterinary*; D004283:Dog Diseases / Q000628:therapy*; D004285:Dogs; D004452:Echocardiography / Q000662:veterinary; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D008297:Male; D011666:Pulmonary Valve Stenosis / Q000628:therapy / Q000662:veterinary*; D016019:Survival Analysis; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler / Q000662:veterinary