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Exertional Dyspnea. Shortness of breath during exercise (exertional dyspnea) produces a sensation of not being able to get enough air and a feeling of being out of breath..A number of factors can cause exertional dyspnea, but they are usually related to insufficient tissue oxygenation by the blood.xertional Dyspnea. Shortness of breath during exercise (exertional dyspnea) produces a sensation of not being able to get enough air and a feeling of being out of breath..
It's characterized by sudden and severe shortness of breath at night that can wake a person up can cause coughing and wheezing. PND is a sign of congestive heart failure and often strikes one or two hours after the person with heart failure has fallen asleep. Specifically, dyspnea, refers to the sensation of difficult or uncomfortable breathing,according to the National Center for Biotechnonoly Information. However, Dyspnea is not the same as hyperventilation which consists of short, quick breaths and an inability to get one's breath.