<unk>  is when increased breathing is required to meet demand, as during and following exercise or when the body lacks oxygen (hypoxia), for instance in high altitude or as a result of anaemia.<unk>  may also occur as a result of sepsis, and is usually a sign of the beginning of refractory sepsis.  Tachypnea differs from<unk>  in that tachypnea is rapid shallow breaths, while<unk>  is rapid deep breaths.
Hypernea
Apnea
Dyspnea
Tachypnea
Shallow breathing
Orthopnea
Labored breathing
Hypopnea