Evaluation of response to combination therapy with enalapril and torasemide in dogs with mitral valve disease

Abstract

The present study was carried out with the objective of evaluating the response to a combination therapy of enalapril and torasemide in dogs with mitral valve disease (MVD). Dogs diagnosed with stage C of MVD as per the American College of Veterinary Internal Medicine guidelines were included in the study. Treatment was initiated with enalapril at 0.5 mg/kg BID and torasemide at 0.2 mg/kg OD orally on 0th day. Detailed clinical examination with special reference to the cardiovascular system including measurement of blood pressure, radiographic, electrocardiographic and echocardiographic parameters of the animals were performed on 0th and 30th day of treatment. The treatment was well tolerated by all the animals. Amelioration of clinical signs with a noticeable reduction in cough was noticed in all the animals. On 30th day of treatment, a significant decrease was noticed in the vertebral heart score and left ventricular internal diameter during diastole and a non-significant decrease was noticed in left atrium to aortic root ratio, left ventricular internal diameter during systole, with a considerable reduction in severity of mitral regurgitation. Post- treatment clearing of lung fields was noticed in dogs with radiographic evidence of pulmonary oedema on 0th day. In addition to this, ventricular premature complexes noticed in three animals pre- treatment was not noticed post treatment.