Influence of obstructive sleep apnoea on circadian blood pressure profile

Influence of sampling interval on the evaluation of nocturnal blood pressure in subjects with and without obstructive sleep apnoea.

Blood pressure (BP) variability during sleep is high in obstructive sleep apnoea syndrome (OSAS). How BP sampling interval affects the estimate of mean nocturnal BP in OSAS and control subjects was investigated. Nine subjects with apnoea/hypopnoea index (AHI) <5 and 18 OSAS patients with AHI >30 underwent nocturnal polysomnography with beat-by-beat BP monitoring. Mean nocturnal BP was evaluated...

Role of hypoxia on increased blood pressure in patients with obstructive sleep apnoea.

BACKGROUND Cyclical changes in systemic blood pressure occur during apnoeic episodes in patients with obstructive sleep apnoea (OSA). Although several factors including arterial hypoxaemia, intrathoracic pressure changes, and disruption of sleep architecture have been reported to be responsible for these changes in blood pressure, the relative importance of each factor remains unclear. This stu...

Nasal continuous positive airway pressure: influence on digital volume pulse in obstructive sleep apnoea patients.

Obstructive sleep apnoea (OSA) is linked to increased cardiovascular risk. This risk can be reduced by nasal continuous positive airway pressure (nCPAP) treatment. As OSA is associated with an increase of several vasoconstrictive factors, we investigated whether nCPAP influences the digital volume pulse wave. We performed digital photoplethysmography during sleep at night in 94 consecutive pati...

Obstructive Sleep Apnoea Syndrome

Paediatric obstructive sleep apnoea.

Department of Otolaryngology, James Cook University Hospital, Middlesbrough TS4 3BW Department of Paediatric Otolaryngology, Royal Hospital for Sick Children, Glasgow G3 8SJ Department of Paediatric Respiratory Medicine, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP Department of Anaesthesia, James Cook University Hospital, Middlesbrough TS4 3BW Correspondence to: S Powell steven_m_powe...