types of dyspnea

What is dyspnea (shortness of breath)? What are paroxysmal nocturnal dyspnea (PND) and sighing of dyspnea? What is the contrast between dyspnea and shortness of breath? What is acute and chronic dyspnea? Acute dyspnea Chronic dyspnea Who gets dyspnea? As it has so many causes, shortness of breath is very usual. But you might be…