A soft systolic murmur and/or gallop rhythm (S3) may be a usculted at the left apex. In some cases, this may be the
first sign of the disease. A tachyarrhythmia may be noted. Although canine DCM is predominantly a left ventricular
disease, biventricular involvement and failure with jugular venous distension and ascites is frequently noted, particularly
in the giant breeds.