The role of sleep-disordered breathing (SDB) in the development of persistent daytime
pulmonary hypertension (PH) and cor pulmonale is controversial and has not been extensively
studied. In this review we discuss the physiological changes that occur during SDB
in the cardiovascular system, as well as review the most recent literature examining
the relationship between SDB and PH/cor pulmonale. The literature suggests that much
of the PH and right heart dysfunction seen in SDB is related to concurrent obesity
and underlying lung disease, although it does appear that isolated SDB (in the form
of obstructive sleep apnea) may be responsible for a small but significant degree
of PH. The clinical consequences of this, however, remain unclear.
Sleep-disordered breathing - obstructive sleep apnea - pulmonary hypertension - cor
pulmonale