Ewarts procedures sign is a medical term used to describe a characteristic sign found in patients with constrictive pericarditis. This condition involves the scarring and thickening of the pericardial sac surrounding the heart. The Ewarts procedures sign specifically refers to the presence of dilated internal mammary arteries seen on a chest x-ray. These dilated arteries can be observed in the paraspinal region and are indicative of chronic inflammation and congestion caused by constrictive pericarditis. Synonyms for Ewarts procedures sign could include dilated internal mammary arteries sign or paraspinal arterial dilation sign. These terms emphasize the characteristic radiological finding associated with constrictive pericarditis.