Category: A

Blood pressure as measured in a major artery.  

A test done on arterial blood to determine gas exchange in the lungs.  

An enzyme used to measure liver function.  

A procedure in which a transducer is applied to the apex of the heart (the lowest point of the heart that is also the farthest to the left), to identify abnormal heart sounds in such conditions as heart valve disease or tumor of the heart muscle.  

An X-ray study, using a series of films of the circulatory system of the abdomen and a portion of the lower extremities after injection of contrast medium through a needle or catheter into an artery or vein in the lower part of the body.  

A thyroid autoantibody, present in patients with autoimmune reactions in the thyroid gland.  

A test done on serum to measure streptolysin O, which kills red blood cells. An immune reaction occurs in which antibodies are produced. In turn, the antistreptolysin O titer is elevated. An antibody against streptolysin 0 that is used retrospectively to diagnose infections with group A beta-hemolytic streptococci.  

An antibody substance measured in blood to detect streptococcal infection.  

An antibody substance measured in blood to aid in the diagnosis of rheumatic diseases.  

An antibody substance measured in blood to help diagnose the presence, and monitor the progress, of systemic lupus erythematosus.