Diagnosis of Atrial Fibrillation in a Horse in Association with Microfilariasis

Abstract

A 12-year-old crossbred mare was presented to the clinic with a history of frequent reduction in the working capacity. Clinical examination revealed congested mucus membranes, elevated respiratory rate and arrhythmia. Laboratory analysis revealed the anemia, lowered packed cell volume, lowered albumin, total protein, sodium and potassium levels. Electrocardiography confirmed the presence of the atrial fibrillation and wet blood film examination showed the presence of the motile microfilaria organisms. The horse was treated with oral administration of quinidine sulfate and other supportive therapy.