THE hyperventilation syndrome, as seen in anxious, tense persons, is characterized by paresthesia of the extremities and circumoral area, sensations of lightheadedness and altered consciousness and ...

Hyperventilation refers to fast breathing. In some cases, people who hyperventilate may breathe deeper than usual. Hyperventilation may occur due to an underlying condition or emotional distress. A ...

The body has a set of physiological responses to danger: the pupils dilate, respiration deepens, heart rate and blood pressure rise, muscles tense for action. The gastro-intestinal system reacts also.