Dyspnea

Dyspnea is a subjective feeling of lack of air caused by increasing respiratory distress. The most important sign of shortness of breath is a feeling of lack of air in the lungs, which is perceived by a person as the inability to take a full inhalation or exhalation. In breathing, the frequency, duration of exhalation, depth and level of breathing tension change. Often there are noticeable inhalations in the exhalation. Impaired breathing rhythm prevents a person from speaking and straining his vocal cords. Breathing becomes more frequent during sleep in response to a variety of external stimuli, and as respiratory failure progresses, it becomes more frequent and superficial. It is necessary to distinguish shortness of breath from subjectively perceived