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.
heart valve - a valve to control one-way flow of blood. cardiac valve. ticker, heart, pump - the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body; he stood still, his heart thumping wildly.