Abstract
An 11-year-old Shiba dog, which had been medicated for mitral regurgitation for three years, developed atrial fibrillation. The dog was hospitalized as it showed severe clinical symptoms including lethargy and anorexia. Blood chemisitry tests on day one revealed elevated glucose, alanine aminotransferase, aspartate amino transferase, blood urea nitrogen and creatinine, and hypokalemia. By the following day, defibrillation had been achieved by additional medication with efonidipine hydrochloride. The dog has been in good condition for 300 days since the defibrillation.
