CLINICAL RESULTS OF BALLOON PLASTY OF PULMONARY ARTERY VALVE IN BULLDOG DOGS

Abstract

The paper presents the results of a clinical and experimental study to determine the clinical efficacy of surgical treatment of animals with pulmonary artery valve stenosis using balloon plasty. The study was retrospective, animals were evaluated from 2018 to 2020, and the morphofunctional state of the cardiovascular system was assessed before and after surgery. The total sample consisted of 15 animals. Diagnosis of this defect was performed auscultatively and by echocardiography [ultrasound]. On auscultation systolic murmur was heard in all animals. Echocardiography evaluated the geometry and function of the right heart, as well as velocity and gradient on the pulmonary artery valve. All animals were diagnosed with congenital heart defect: pulmonary artery valve stenosis. After diagnosis, each dog underwent balloon plasty of the pulmonary artery valve. No animal died during and after surgical intervention. All animals were discharged on the day of surgery for outpatient treatment. There were no postoperative complications. Maintenance and feeding remained unchanged at all times. All animals became more active after the operation, clinical signs of the disease, if any, were resolved or reduced markedly. One month later, repeated echocardiography was performed to evaluate the pulmonary artery valve velocity and gradient. In one animal we observed increased flow velocity on the pulmonary artery valve, which was associated with increased systolic function after surgery. In the remaining dogs, a decrease in velocity and pressure gradient at the pulmonary artery valve was noted. -