Fig. 3

Comparison of murmur intensity in 139 dogs, in which the cardiac murmur was quantified on a 1–6 scale both by the referring veterinarian (Practitioner) and by the veterinary cardiology specialist (Cardiologist) at two different time points. The thickness of the lines is proportional to the number of cases. In 39 (28%) cases there was no difference between their judgements, in 53 (38%) cases one grade of difference, in 28 (20%) cases two grades of difference, in 15 (11%) cases three grades of difference and in 4 (3%) cases four grades difference were found. The mean murmur intensity as recorded by the referring veterinarian was 2.7 (range 1–6), while this value was 3.3 (range 0–6) as assessed by the veterinary cardiology specialists. 0  =  absence of an audible murmur, 1  =  softest murmur, 6  =  loudest murmur intensity