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  • Title: Efficacy of oral torasemide in dogs with degenerative mitral valve disease and new onset congestive heart failure: The CARPODIEM study.
    Author: Besche B, Blondel T, Guillot E, Garelli-Paar C, Oyama MA.
    Journal: J Vet Intern Med; 2020 Sep; 34(5):1746-1758. PubMed ID: 32767627.
    Abstract:
    BACKGROUND: Torasemide is a potent loop diuretic with potential to treat congestive heart failure (CHF) in dogs. OBJECTIVE: Evaluate the efficacy and safety of torasemide compared to furosemide in dogs with first occurrence of CHF caused by degenerative mitral valve disease (DMVD). ANIMALS: Three hundred and nineteen dogs with new onset CHF attributable to DMVD. METHODS: Double-blinded randomized noninferiority study of PO torasemide vs furosemide in addition to standard CHF treatment. The primary efficacy criterion was decreased pulmonary edema and cough and no worsening of dyspnea or exercise tolerance at day 14. Secondary endpoints included clinical response at day 84 and time to death, euthanasia, or premature study withdrawal for cardiac reasons. RESULTS: Torasemide q24h (n = 161) was noninferior to furosemide q12h (n = 158); percentage of dogs meeting primary efficacy criterion at day 14 was similar between groups (torasemide, 74.4% [95% confidence interval (CI), 66.8%-81.0%] vs. furosemide, 73.5% [95% CI, 65.7%-80.4%]; risk ratio [RR], 1.01; 95% CI, 0.89-1.15; P = .87). Efficacy at day 84 showed similar results (RR, 1.05; 95% CI, 0.88-1.25; P = .6). Dogs receiving torasemide had a longer time to endpoint and were less than half as likely to experience death, euthanasia, or premature study withdrawal (hazard ratio, 0.36; 95% CI, 0.19-0.65; P = .001) than dogs receiving furosemide at any time during the study. CONCLUSION AND CLINICAL IMPORTANCE: Torasemide was noninferior to furosemide as first line PO treatment for new onset CHF caused by DMVD. Torasemide significantly decreased risk of cardiac-related death or premature study withdrawal for cardiac reasons compared to furosemide.
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