Surgical treatment of severe pulmonic stenosis under cardiopulmonary bypass in small dogs.
OBJECTIVE
The aim of this study was to report the long-term outcome of the surgical palliation of pulmonic stenosis in dogs.


METHODS
The subjects comprised three female and six male dogs, mean (±sd) age: 23 (±25) months, mean (±sd) weight: 3·4 (±2·1) kg, diagnosed with severe pulmonic stenosis and right ventricular hypertrophy, with an average preoperative pressure gradient of 153 (±43) mmHg on echocardiography.


RESULTS
The pressure overload with severe pulmonic stenosis was reduced by valvotomy, i.e., open pulmonary valve commissurotomy, with/without biomembrane patch grafting, under cardiopulmonary bypass. The postoperative pressure gradient at 1 to 7 days was significantly decreased to 65 (±39) mmHg (P<0·05). The reduced pressure gradient was maintained at 58 (±38) mmHg at final follow-up.


CONCLUSIONS
Open valvotomy, pulmonary valve commissurotomy and biomembrane patch grafting were effective in reducing obstruction in severe pulmonic stenosis in dogs.
Department of Veterinary Internal Medicine, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, Japan.
M
M
Fujiwara
K
K
Harada
T
T
Mizuno
M
M
Nishida
T
T
Mizukoshi
M
M
Mizuno
M
M
Uechi
D000818:Animals; D002315:Cardiopulmonary Bypass / Q000662:veterinary*; D004283:Dog Diseases / Q000473:pathology / Q000601:surgery*; D004285:Dogs; D005260:Female; D008297:Male; D011183:Postoperative Complications / Q000662:veterinary; D011666:Pulmonary Valve Stenosis / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D012720:Severity of Illness Index; D016896:Treatment Outcome