The diagnosis is based on a physical examination, during which the doctor will look for fever, joint inflammation, skin rashes or subcutaneous nodules, arrhythmias or murmurs and signs of inflammation in the nerves, which is achieved by a few simple tests of movement.
If you are diagnosed with and previously treated for infection in the throat, the doctor will order blood tests to indicate the presence of antibodies associated with infection of the blood. Cardiac function can be examined by means of electrocardiografías or echocardiograms.