Sleep-related breathing disorders are quite common in patients withestablished cerebrovascular accidents. More than 50% of stroke patientshave sleep-disordered breathing, mostly in the form of obstructive sleepapnea. Polysmnography(PSG) has been used to study respiratoryparameters in patients with cererbovascular disease. We applied PSGrecording for a group of 50 patients suffering from hypertension, strokeor transient ischemic attacks, as well as a group of 20 age and sexmatched control subjects. The recording occurred along 6-8 hoursovernight. We utilized a montage formed of 4 EEG channels, 2 EOGchannels, one EMG, one ECG, body position detection, respiratorymonitoring, snoring, oxygen desaturation and pulse oximetry channels.The Berlin questionnaire was also carried out for the patients. Therecordings were analysed and apnea/hypopnea indices (AHI) were foundfor each subject. We found that 14% of patients had mild sleep apnea(AHI ≥5), 20% had moderate sleep apnea (AHI >15) and 34% had severesleep apnea (AHI >30). We also found that obese patients withhypertension or stroke had significantly higher apnea and hypoponeaindices than those of normal weight. Moreover, the diabetic hypertensivegroup showed significantly lower percentages of sleep efficiency. Also,all the high-risk group Berlin patients showed evidence of sleep apnea.