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Hemorrhagic transformation is a complex phenomenon where brain tissue bleeds, which could be associated or not to an increase in the neurological deficit after the acute ischemic stroke. The aim of our study was to evaluate clinical predictors of hemorrhagic transformation in patients with non-lacunar ischemic stroke. We performed a prospective analysis of the clinical records and images of patients with non-lacunar ischemic stroke. Demographics, vascular risk factors, previous medications and the information of the event in patients with and without hemorrhagic transformation were here compared. We included in this study 747 patients with non-lacunar stroke, the mean age was 77 ± 11 years and 61% were females. In the univariate analysis, the age, a history of hypertension, atrial fibrillation, chronic kidney disease and the previous use of oral anticoagulation resulted statistically significant. In the multivariate analysis of logistic regression adjusted by age and vascular risk factors: the age80 years (OR 3.6, CI 95% 1.8-7.6), the pulse pressure60 mmHg at admission (OR 5.3, CI 95% 3.2-9.1), the chronic kidney disease (OR 3, CI 95% 2.5-3.8) and the presence of previous atrial fibrillation (OR 3.5, CI 95% 2.1-6.1) were associated with and increased risk of hemorrhagic transformation. The predictors of hemorrhagic transformation in our cohort showed a relationship with severe vascular illness. The identification of these patients could influence therapeutic decisions that could increase the risk of hemorrhagic transformation.

The obstructive sleep apnea syndrome (OSA) confers increased risk of cardiovascular disease, given its association with other vascular risk factors. Both OSA and other vascular risk factors are associated with silent brain lesions.To assess the prevalence of silent brain lesions in patients with OSA.We retrospectively evaluated a cohort of 137 patients with OSA. The mean age was 65 ± 12 years; 45% were women. The silent brain lesions in magnetic resonance imaging were assessed with the Visual Scale of Fazekas (FVS), and the presence of cortical infarcts, lacunar and microbleedings was assessed.Vascular risk factors prevalence was: hypertension 64%, dyslipemia 58%, diabetes 18%, smoking 34%, carotid atherosclerosis 26%, coronary heart disease 13%, and atrial fibrillation 4%. OSA was mild in 47%, moderate in 31% and severe in 22% of the patients. 91% of patients had periventricular hyperintensities, and 66% showed subcortical white matter lesions. The average value of apnea/hipopnea index was higher in patients with score 2 and 3 in FVS, although without statistical significance.Patients with OSA in our study have a high prevalence of silent brain lesions, mainly with microangiopathic pattern. This is possibly explained by the relation between OSA, hypertension and other vascular risk factors.Prevalencia de lesion vascular cerebral silente en pacientes con sindrome de apnea/hipopnea obstructiva del sueño.Introduccion. El sindrome de apnea/hipopnea obstructiva del sueño (SAHOS) confiere mayor riesgo de enfermedad cardiovascular, dada su asociacion con otros factores de riesgo vascular. Tanto el SAHOS como otros factores de riesgo vascular se asocian con lesiones cerebrales silentes. Objetivo. Evaluar la prevalencia de lesiones cerebrales silentes en pacientes con SAHOS. Pacientes y metodos. Se evaluo retrospectivamente una cohorte de 137 pacientes con SAHOS, con una edad media de 65 ± 12 años, el 45% mujeres. Las lesiones cerebrales silentes en resonancia magnetica se evaluaron con la escala visual de Fazekas, y se consigno la presencia de infartos corticales, lacunares y microsangrados. Resultados. La prevalencia de factores de riesgo vascular fue: hipertension, 64%; dislipidemia, 58%; diabetes, 18%; tabaquismo, 34%; ateromatosis carotidea, 26%; enfermedad coronaria, 13%; y fibrilacion auricular, 4%. El SAHOS fue leve en el 47%, moderado en el 31% y grave en el 22% de los casos. El 91% de los pacientes tenia hiperintensidades periventriculares y el 66% presentaba lesiones en la sustancia blanca subcortical. El valor medio del indice de apnea/hipopnea fue mayor en los pacientes con mayor carga de lesiones, aunque sin significacion estadistica. Conclusiones. Los pacientes con SAHOS presentan una elevada prevalencia de lesiones cerebrales silentes, fundamentalmente con un patron microangiopatico. Posiblemente esto se explique por la asociacion entre el SAHOS, la hipertension arterial y otros factores de riesgo vascular.