An abnormal sound heard in the heart caused by a

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an abnormal sound heard in the heart, caused by a defective valve or opening in the heart Orthopnea: difficult or labored breathing when recumbent that is usually relieved by an upright position Syncope: fainting, temporary loss of consciousness Synergism: a combination of substances or agents that produce an effect greater than expected Tachycardia: excessively rapid heartbeat Chapter 19: Respiratory Disorders Apnea: lack of breathing Bifurcation: the division of a tube or vessel into two channels or branches Bronchodilation: relaxation of smooth muscle in the bronchioles, widening the airway Cohesion: tendency to stick together or be attracted Eupnea: normal, regular, quiet breathing Hypercapnia: increased level of carbon dioxide (CO2)in the blood
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Hypoxemia: insufficient oxygen in the arterial blood Paroxysmal nocturnal dyspnea: awakening in severe respiratory distress, usually associated with pulmonary edema Protease: an enzyme that breaks down a protein into amino acids Pulsus paradoxus:
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