neuron A nerve cell.
nitroglycerin A drug used to treat angina. It dilates coronary arteries.
noninvasive techniques Medical procedures that do not involve surgery, a needle puncture, or entering an artery.
norepinephrine A hormone secreted by nerve endings and the adrenal glands that helps to maintain constant blood pressure by constricting certain blood vessels when blood pressure drops.
Norwood procedure An operation to treat pulmonary insufficiency in which a shunt is created to provide blood flow from the heart to the lungs.