Rat study finds prenatal exposure to nicotine increases risk of apnea

University of Arizona researchers report new evidence that exposure to nicotine in the developing rat fetus enhances the function of GABAa receptors, a key component of brain cells that control breathing rhythm. The increased functional capacity of the GABAa receptors may make these newborns more likely to have episodes of apnea, in which breathing simply stops.

Sleep apnea may be a cause, rather than just an effect, of heart failure

An interruption in normal breathing patterns during sleep which is often seen in heart failure patients may contribute to heart failure rather than just being a result, according to findings of a Mayo Clinic study.
“We are now finding that central sleep apnea, which has been previously understood as a symptom of heart failure, may contribute to the development of heart failure in people at risk,” said the study’s lead researcher.