Disturbi respiratori del sonno in pazienti con stroke emorragico: prevalenza e impatto sull'outcome

Background: Obstructive sleep apnea (OSA) is currently undertaken to impair ischemic stroke risk especially by intracranial pressure, blood flow, glucose metabolism, atherogenesis, blood coagulation, cardiac arrhythmia and arterial hypertension. In OSA patients hypertension is often related to drug resistance and modification in nocturnal blood pressure profile. In stroke patients with OSA has been observed an impairment of functional outcome. About OSA and intra cranial haemorrhage (ICH) few data are available in literature and most of them are anecdotal. We can speculate that OSA can affect on ICH by arterial hypertension. Methods: in this study we sought to test whether suspected OSA is more prevalent in ICH group than in control. In order to limit potential confounding variables associated with acute ICH, we tested by Berlin Questionnaire (BQ) and Epworth Sleepiness Scale (ESS) referring to the previous 3 months before ICH. Secondarily, we tried to assess if OSA in ICH could affect on functional outcome (mRS) like disability or mortality, as described in ischemic stroke. For these purposes we recruited 111 ICH patients matched by sex, age, Body Mass Index (BMI) and Charlson Comorbidity Index (CCI) with 111 ischemic stroke patients and 111 controls. Results: In ICH patients we found BQ positivity in 30,6% vs 25,2% in ischemic stroke patients vs 13,5% in controls (p 0.01). Moreover BQ positive ICH patients had more disability, mortality, length of recovery, arterial hypertension, drug resistance hypertension and nocturnal blood pressure profile alteration, especially non dipper pattern, than BQ negative ICH. Conclusion: The results suggest that OSA can be considered a risk factor and a negative prognostic factor in ICH patients, as described before in ischemic stroke patients. Moreover we can considered this fenomena probably related to blood pressure alteration caused by sleep breathing disorder.