@article {Westeren-PunnonenP79, author = {Susanna Westeren-Punnonen and Anu Muraja-Murro and Anne-Mari Kantanen and Jaana Autere and Pekka J{\"a}k{\"a}l{\"a} and Juha T{\"o}yr{\"a}s and Sami Myllymaa and Esa Mervaala and Katja Myllymaa}, title = {Acute on-ward frontal EEG combined polygraphy to diagnose OSA after first episode of TIA or ischaemic stroke}, volume = {3}, number = {suppl 1}, elocation-id = {P79}, year = {2017}, doi = {10.1183/23120541.sleepandbreathing-2017.P79}, publisher = {European Respiratory Society}, abstract = {Obstructive sleep apnea (OSA) increases the risk of TIA and ischemic stroke, and it also worsens strok{\'e}s rehabilitation outcomes. However, screening of OSA is not routinely performed in TIA or acute stroke. The aims were (i) to study the prevalence and severity of OSA with polygraphy (PG) in patients suffering from first TIA or acute ischemic stroke at university hospital acute stroke unit, and (ii) to evaluate the usability of fast forehead EEG electrode set for portable sleep studies in stroke units when full polysomnography (PSG) is not available.Fifty-four patients with TIA or mild to moderate ischemic stroke were evaluated. The patients (33M, 21F, mean age 66.3{\textpm}10.1y; BMI 28.3{\textpm}5.0 kg/m2) were recruited from neurological ward at Kuopio University Hospital by experienced neurologists. All patients underwent an acute (1-4 days after TIA or stroke) in-hospital PG supplemented with a forehead EEG electrode set, previously shown to serve a reliable and simple solution to measure sleep.Based on standard PG data, OSA was diagnosed in 69\% of the TIA/stroke patients (AHI{\guilsinglright}5). The prevalence of OSA was significantly higher in males (82\%) than in females (48\%). In 55\% of male patients, OSA severity was at least moderate (AHI{\guilsinglright}15). The forehead EEG electrode set was easy to apply, and it provided high quality overnight recordings. Overall, PG combined with forehead EEG seemed to be well-suited for acute stroke unit settings.The vast majority of patients with first acute episode of TIA or ischemic stroke had evidence of undiagnosed OSA, thus urging for routine screening for OSA in stroke units. This is possible to perform accurately with portable PSG devices and simple forehead EEG electrode sets.}, URL = {https://openres.ersjournals.com/content/3/suppl_1/P79}, eprint = {https://openres.ersjournals.com/content}, journal = {ERJ Open Research} }