Question: North Carolina Subscriber Answer: No. Paroxysmal nocturnal dyspnea (786.09, Dyspnea and respiratory abnormalities; other) involves the patient waking at night with a feeling of suffocation, typically because of pulmonary edema (fluid accumulation in the lungs) from sleeping in the reclined position. This condition is a classic system of heart failure. Paroxysmal nocturnal dyspnea may occur in valvular heart disease, hypertension, or other conditions affecting the left ventricle. Term tip: