Cardiac markers are substances that can be measured in the blood to assess heart health and diagnose  various cardiac conditions, especially heart attacks (myocardial infarctions) and other acute coronary  syndromes.

The typical age for developing rheumatoid arthritis (RA) is between ages 30 and 50. It can, however,  affect children, teens, and younger adults. Osteoarthritis (OA) commonly develops after the age 50 or 60  years, but there are studies that reveal radiographic evidence of OA occurring in women in their 40s. 

An arthritis profile helps healthcare professionals diagnose and manage arthritis and related conditions. 

"Arthritis" literally means joint inflammation. Joints are places where two bones meet, such as your  elbow or knee.