Noun
hypoventilation (usually uncountable, plural hypoventilations)
English Wikipedia has an article on:hypoventilationWikipedia
(medicine) Respiratory depression, occurring when ventilation is inadequate to perform the necessary gas exchange, which may be caused by certain medical conditions, by holding one's breath, or by drug overdose.
Hypotension and suppressed breathing ( hypoventilation ) may be encountered with intravenous use. Source: Internet
Other forms of sleep apnea include central sleep apnea and sleep-related hypoventilation. Source: Internet