Which is true regarding paroxysmal nocturnal dyspnea (PND) ?
A) The patient usually falls asleep in the sitting position and 1 or 2 hours later, awakens from sleep with acute shortness of breath.
B) The mechanism of PND is the transfer of fluid from intravascular tissues into the bloodstream (or extravascularly) during sleep.
C) Classic PND is resolved by elevating the lower extremities in the supine position.
D) This symptom has strong predictive value as a sign of CHF.
Correct Answer:
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