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.
Your doctor listens to your heart with the aid of a stethoscope. The opening and closing of your valves make sounds (lub dub) known as the heart sounds. The doctor can evaluate your heart and valve function and hear your heart's rate and rhythm by listening to your heart sounds.