nitrogen (countable and uncountable, plural nitrogens) ( 1 uncountable) A chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067. ( 2 uncountable) Molecular nitrogen (N2), a colorless, odorless gas at room temperature.
Your primary care doctor may detect a heart murmur or other signs of heart valve disease. However, a cardiologist usually will diagnose the condition. A cardiologist is a doctor who specializes in diagnosing and treating heart problems. To diagnose heart valve disease, your doctor will ask about your signs and symptoms. He or she also will do a physical exam and look at the results from tests and procedures.
1 A nephrologist-a doctor who specializes in diseases of the kidney. 2  A neurologist-a doctor who specializes in diseases of the brain and nervous system. 3  A gastroenterologist-a doctor who specializes in diseases of the gastrointestinal tract. 4  A pulmonologist-a doctor who specializes in diseases of the lungs.