Surgical treatment of pulmonic stenosis in dogs under cardiopulmonary bypass: outcome in nine dogs

ObjectivesTo describe the outcome for nine dogs with pulmonic stenosis treated by open patch grafting using expanded polytetrafluoroethylene under cardiopulmonary bypass.
Materials and MethodsData were collected from the hospital records of all dogs that had undergone right ventricular outflow tract grafting with an expanded polytetrafluoroethylene patch under cardiopulmonary bypass between 2006 and 2012 for the treatment of pulmonic stenosis. Echocardiographic images were reviewed and the pressure gradient across the right ventricular outflow tract re‐measured. Owners of dogs still alive at the time of writing were invited to return to the hospital for reassessment.
ResultsNine dogs met the inclusion criteria. Median pressure gradient preoperatively was 118 mmHg, (range 102 to 259 mmHg) reducing to a median of 20 mmHg (range 7 to 53 mmHg) at 48 hours postoperatively and 14 mmHg (range 10 to 70 mmHg), with a median percentage reduction of 89% (range 41 to 94%) at long‐term follow‐up. Eight of nine dogs survived surgery, with six of nine surviving to hospital discharge. Two dogs were still alive over 6 and 8 years postoperatively. No long‐term deaths were believed to be attributable to pulmonic stenosis.
Clinical SignificanceExpanded polytetrafluoroethylene patch grafting of the right ventricular outflow tract for treatment of severe pulmonic stenosis in dogs is feasible and can be an effective method to reduce the severity of right ventricular outflow ...

Source: The Journal of Small Animal Practice - November 29, 2017 Category: Veterinary Research Authors: P. Bristow, J. Sargent, V. Luis Fuentes, D. Brockman Tags: PAPER Source Type: research