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Dive into the research topics where Millene R Camilo is active.

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Featured researches published by Millene R Camilo.


Sleep Medicine | 2014

SOS score: an optimized score to screen acute stroke patients for obstructive sleep apnea.

Millene R Camilo; Heidi H. Sander; Alan Luiz Eckeli; Regina Maria França Fernandes; Taiza E. G. Santos-Pontelli; João Pereira Leite; Octávio Marques Pontes-Neto

BACKGROUND Obstructive sleep apnea (OSA) is frequent in acute stroke patients, and has been associated with higher mortality and worse prognosis. Polysomnography (PSG) is the gold standard diagnostic method for OSA, but it is impracticable as a routine for all acute stroke patients. We evaluated the accuracy of two OSA screening tools, the Berlin Questionnaire (BQ), and the Epworth Sleepiness Scale (ESS) when administered to relatives of acute stroke patients; we also compared these tools against a combined screening score (SOS score). METHODS Ischemic stroke patients were submitted to a full PSG at the first night after onset of symptoms. OSA severity was measured by apnea-hypopnea index (AHI). BQ and ESS were administered to relatives of stroke patients before the PSG and compared to SOS score for accuracy and C-statistics. RESULTS We prospectively studied 39 patients. OSA (AHI ≥10/h) was present in 76.9%. The SOS score [area under the curve (AUC): 0.812; P = 0.005] and ESS (AUC: 0.789; P = 0.009) had good predictive value for OSA. The SOS score was the only tool with significant predictive value (AUC: 0.686; P = 0.048) for severe OSA (AHI ≥30/h), when compared to ESS (P = 0.119) and BQ (P = 0.191). The threshold of SOS ≤10 showed high sensitivity (90%) and negative predictive value (96.2%) for OSA; SOS ≥20 showed high specificity (100%) and positive predictive value (92.5%) for severe OSA. CONCLUSIONS The SOS score administered to relatives of stroke patients is a useful tool to screen for OSA and may decrease the need for PSG in acute stroke setting.


Sleep Medicine | 2016

Sleep-disordered breathing among acute ischemic stroke patients in Brazil

Millene R Camilo; Saul V. Schnitman; Heidi H. Sander; Alan Luiz Eckeli; Regina Maria França Fernandes; João Pereira Leite; Claudio L. Bassetti; Octávio Marques Pontes-Neto

OBJECTIVES Sleep-disordered breathing (SDB) is very common in acute stroke patients and has been related to poor outcome. However, there is a lack of data about the association between SDB and stroke in developing countries. The study aims to characterize the frequency and severity of SDB in Brazilian patients during the acute phase of ischemic stroke; to identify clinical and laboratorial data related to SDB in those patients; and to assess the relationship between sleep apnea and functional outcome after six months of stroke. METHODS Clinical data and laboratorial tests were collected at hospital admission. The polysomnography was performed on the first night after stroke symptoms onset. Functional outcome was assessed by the modified Rankin Scale (mRS). RESULTS We prospectively evaluated 69 patients with their first-ever acute ischemic stroke. The mean apnea-hypopnea index (AHI) was 37.7 ± 30.2. Fifty-three patients (76.8%) exhibited an AHI ≥ 10 with predominantly obstructive respiratory events (90.6%), and thirty-three (47.8%) had severe sleep apnea. Age (OR: 1.09; 95% CI: 1.03-1.15; p= 0.004) and hematocrit (OR: 1.18; 95% CI: 1.03-1.34; p= 0.01) were independent predictors of sleep apnea. Age (OR: 1.13; 95% CI: 1.03-1.24; p= 0.01), body mass index (OR: 1.54; 95% CI: 1.54-2.18; p= 0.01), and hematocrit (OR: 1.19; 95% CI: 1.01-1.40; p= 0.04) were independent predictors of severe sleep apnea. The National Institutes of Health Stroke Scale (NIHSS; OR: 1.30; 95% CI: 1.1-1.5; p= 0.001) and severe sleep apnea (OR: 9.7; 95% CI: 1.3-73.8; p= 0.03) were independently associated to mRS >2 at six months, after adjusting for confounders. CONCLUSION Patients with acute ischemic stroke in Brazil have a high frequency of SDB. Severe sleep apnea is associated with a poor long-term functional outcome following stroke in that population.


Journal of Neuroradiology | 2015

Early versus late carotid artery stenting for symptomatic carotid stenosis

Luis Henrique de Castro-Afonso; Guilherme Seizem Nakiri; Lucas Moretti Monsignore; Antonio C. Santos; João Pereira Leite; Soraia Ramos Cabete Fabio; Pedro Telles Cougo-Pinto; Millene R Camilo; Octávio Marques Pontes-Neto; Daniel Giansante Abud

INTRODUCTION Early carotid revascularization (≤ 14 days) is recommended for symptomatic carotid stenosis. Carotid artery stenting (CAS) has become an alternative to carotid endarterectomy (CEA); however, safety data on early CAS is controversial. The study aims to compare early versus late CAS, when CAS is performed as a first intention revascularization strategy. METHODS A retrospective analysis of all symptomatic patients admitted to our stroke unit who underwent CAS was conducted. Patients were divided between two groups: patients who had undergone CAS within 14 days after symptoms and those who had undergone CAS later. Primary endpoints were ipsilateral ischemic stroke or ipsilateral parenchymal hemorrhage (iPH) at 30 days. The secondary endpoints were major adverse cardiac and cerebrovascular events (MACCE) at the 30-day and at the 12-month follow-up. RESULTS One hundred twenty-seven consecutive patients were evaluated. Primary endpoints obtained in the early and late CAS groups were, respectively, ipsilateral stroke (2.0% vs. 2.6%, P = 1.00) and iPH (2.0% vs. 0.0%, P = 0.40). The rates of MACCE between the early and the late CAS groups were, respectively, (7.8% vs. 2.6%, P = 0.21) at the 30-day follow-up, and (12.2% vs. 10.5%, P = 0.77) at the 12-month follow-up. CONCLUSIONS In this study, CAS seems to be safe when used as first intention revascularization treatment within 2 weeks of symptoms, if infarcted area is less than one third of the middle cerebral artery territory. Our results need to be confirmed by larger studies.


Neurology | 2018

CPAP as treatment of sleep apnea after stroke: A meta-analysis of randomized trials

Anne-Kathrin Brill; Thomas Horvath; Andrea Seiler; Millene R Camilo; Alan G. Haynes; Sebastian Robert Ott; Matthias Egger; Claudio L. Bassetti

Objective To perform a systematic review and meta-analysis of randomized controlled trials (RCTs) examining the effectiveness of continuous positive airway pressure (CPAP) in stroke patients with sleep disordered breathing (SDB). Methods In a systematic literature search of electronic databases (MEDLINE, Embase, and the Cochrane Library) from 1980 to November 2016, we identified RCTs that assessed CPAP compared to standard care or sham CPAP in adult patients with stroke or TIA with SDB. Mean CPAP use, odds ratios (ORs), and standardized mean differences (SMDs) were calculated. The prespecified outcomes were adherence to CPAP, neurologic improvement, adverse events, new vascular events, and death. Results Ten RCTs (564 participants) with CPAP as intervention were included. Two studies compared CPAP with sham CPAP; 8 compared CPAP with usual care. Mean CPAP use across the trials was 4.53 hours per night (95% confidence interval [CI] 3.97–5.08). The OR of dropping out with CPAP was 1.83 (95% CI 1.05–3.21, p = 0.033). The combined analysis of the neurofunctional scales (NIH Stroke Scale and Canadian Neurological Scale) showed an overall neurofunctional improvement with CPAP (SMD 0.5406, 95% CI 0.0263–1.0548) but with a considerable heterogeneity (I2 = 78.9%, p = 0.0394) across the studies. Long-term survival was improved with CPAP in 1 trial. Conclusion CPAP use after stroke is acceptable once the treatment is tolerated. The data indicate that CPAP might be beneficial for neurologic recovery, which justifies larger RCTs.


Clinics | 2012

Frequency and predictors of symptomatic intracranial hemorrhage after intravenous thrombolysis for acute ischemic stroke in a Brazilian public hospital.

Pedro Telles Cougo-Pinto; Bruno Lopes dos Santos; Francisco Antunes Dias; Soraia Ramos Cabette Fábio; Ilana Vaula Werneck; Millene R Camilo; Daniel Giansante Abud; João Pereira Leite; Octávio Marques Pontes-Neto

OBJECTIVE: Scarce data are available on the occurrence of symptomatic intracranial hemorrhage related to intravenous thrombolysis for acute stroke in South America. We aimed to address the frequency and clinical predictors of symptomatic intracranial hemorrhage after stroke thrombolysis at our tertiary emergency unit in Brazil. METHOD: We reviewed the clinical and radiological data of 117 consecutive acute ischemic stroke patients treated with intravenous thrombolysis in our hospital between May 2001 and April 2010. We compared our results with those of the Safe Implementation of Thrombolysis in Stroke registry. Univariate and multiple regression analyses were performed to identify factors associated with symptomatic intracranial transformation. RESULTS: In total, 113 cases from the initial sample were analyzed. The median National Institutes of Health Stroke Scale score was 16 (interquartile range: 10-20). The median onset-to-treatment time was 188 minutes (interquartile range: 155-227). There were seven symptomatic intracranial hemorrhages (6.2%; Safe Implementation of Thrombolysis in Stroke registry: 4.9%; p = 0.505). In the univariate analysis, current statin treatment and elevated National Institute of Health Stroke Scale scores were related to symptomatic intracranial hemorrhage. After the multivariate analysis, current statin treatment was the only factor independently associated with symptomatic intracranial hemorrhage. CONCLUSIONS: In this series of Brazilian patients with severe strokes treated with intravenous thrombolysis in a public university hospital at a late treatment window, we found no increase in the rate of symptomatic intracranial hemorrhage. Additional studies are necessary to clarify the possible association between statins and the risk of symptomatic intracranial hemorrhage after stroke thrombolysis.


Clinics | 2012

Supine sleep and positional sleep apnea after acute ischemic stroke and intracerebral hemorrhage

Millene R Camilo; Regina Maria França Fernandes; Heidi H. Sander; Fernando Nobre; Taiza E. G. Santos-Pontelli; Antonio C. Santos; Draulio B. de Araujo; João Pereira Leite; Octávio Marques Pontes-Neto

OBJECTIVE: Obstructive sleep apnea is frequent during the acute phase of stroke, and it is associated with poorer outcomes. A well-established relationship between supine sleep and obstructive sleep apnea severity exists in non-stroke patients. This study investigated the frequency of supine sleep and positional obstructive sleep apnea in patients with ischemic or hemorrhagic stroke. METHODS: Patients who suffered their first acute stroke, either ischemic or hemorrhagic, were subjected to a full polysomnography, including the continuous monitoring of sleep positions, during the first night after symptom onset. Obstructive sleep apnea severity was measured using the apnea-hypopnea index, and the NIHSS measured stroke severity. RESULTS: We prospectively studied 66 stroke patients. The mean age was 57.6±11.5 years, and the mean body mass index was 26.5±4.9. Obstructive sleep apnea (apnea-hypopnea index ≥5) was present in 78.8% of patients, and the mean apnea-hypopnea index was 29.7±26.6. The majority of subjects (66.7%) spent the entire sleep time in a supine position, and positional obstructive sleep apnea was clearly present in the other 23.1% of cases. A positive correlation was observed between the NIHSS and sleep time in the supine position (rs = 0.5; p<0.001). CONCLUSIONS: Prolonged supine positioning during sleep was highly frequent after stroke, and it was related to stroke severity. Positional sleep apnea was observed in one quarter of stroke patients, which was likely underestimated during the acute phase of stroke. The adequate positioning of patients during sleep during the acute phase of stroke may decrease obstructive respiratory events, regardless of the stroke subtype.


Neurology | 2013

Safety of IV thrombolysis in acute ischemic stroke related to Chagas disease

Pedro Telles Cougo-Pinto; Bruno Lopes dos Santos; Francisco Antunes Dias; Millene R Camilo; Frederico Fernandes Alessio-Alves; Clara Monteiro Antunes Barreira; Taiza E. G. Santos-Pontelli; Daniel Giansante Abud; João Pereira Leite; Octávio Marques Pontes-Neto

Objective: To determine the rate of symptomatic intracranial hemorrhage (SIH) and in-hospital mortality among patients with acute ischemic stroke related to Chagas disease (CD) treated with IV tissue plasminogen activator (TPA). Methods: In this retrospective cohort study, consecutive stroke patients treated with IV TPA and routinely tested for CD were retrospectively selected from a single-center, hospital-based, prospective registry of acute stroke patients from 2001 to 2012. Demographic and clinical data were obtained from the registry as well as in-hospital mortality. CT scans were blindly reviewed to assess the occurrence of hemorrhagic transformation. Among acute stroke patients who received IV TPA, we compared those with and without a positive serology for CD. Results: Among 240 patients treated with IV TPA, 174 had serologic testing for CD available. Of those, 24 patients (13.8%) had positive serology for CD. Patients with CD more frequently had heart failure (45.8% vs 14.7%; p < 0.01) and higher admission NIH Stroke Scale scores (19 [15–21] vs 13 [8–19]; p < 0.01) than patients with negative serology. The rates of SIH (4.2% vs 5.3%; odds ratio: 0.77; 95% confidence interval: 0.09–6.46; p = 0.99) and in-hospital death (16.7% vs 11.3%; odds ratio: 1.57; 95% confidence interval: 0.48–5.12; p = 0.50) were not higher among patients with CD. Conclusion: In the largest published series of patients with CD-related stroke treated with IV TPA, we have observed that IV thrombolysis was safely performed and showed no increase of SIH. The diagnosis of CD should not preclude IV thrombolysis in these patients.


Sleep | 2018

Rapid eye movements sleep as a predictor of functional outcome after stroke: a translational study

Marta Pace; Millene R Camilo; Andrea Seiler; Simone Duss; Johannes Mathis; Mauro Manconi; Claudio L. Bassetti

Study Objectives Sleep disturbances are common in acute stroke patients and are linked with a negative stroke outcome. However, it is also unclear which and how such changes may be related to stroke outcome. To explore this link, we performed a sleep electroencephalogram (EEG) study in animals and humans after ischemic stroke. Methods (1) Animal study: 12 male rats were assigned to two groups: ischemia (IS) and sham surgery (Sham). In both groups, sleep architecture was investigated 24 h before surgery and for the following 3 days. (2) Human study: 153 patients with ischemic stroke participating in the SAS-CARE prospective, multicenter cohort study had a polysomnography within 9 days after stroke onset. Functional stroke outcome was assessed by the modified Rankin Scale (mRS) at hospital discharge (short-term outcome) and at a 3-month follow-up (long-term outcome). Results (1) Animal study: rapid eye movement (REM) sleep was significantly reduced in the IS group compared to the Sham group. (2) Human study: patients with poor short-term functional outcome had a reduction of REM sleep and prolonged REM latency during the acute phase of stroke. REM latency was the only sleep EEG variable found to be significantly related to short- and long-term functional impairment in a multiple linear regression analysis. Conclusions Acute ischemic stroke is followed by a significant reduction of REM sleep in animals and humans. In humans, this reduction was linked with a bad stroke outcome; in addition, REM latency was found to be an independent predictor of stroke evolution. Potential explanations for this role of REM sleep in stroke are discussed. Clinical Trial Registration http://clinicaltrials.gov. Unique identifier: NCT01097967.


Journal of Stroke & Cerebrovascular Diseases | 2017

Clinical Outcomes of Patients with Acute Basilar Artery Occlusion in Brazil: An Observational Study

Francisco Antunes Dias; Frederico Fernandes Alessio-Alves; Luis Henrique de Castro-Afonso; Pedro Cougo; Clara Monteiro Antunes Barreira; Millene R Camilo; Guilherme Seizem Nakiri; Daniel Giansante Abud; Octávio Marques Pontes-Neto

BACKGROUND Intravenous thrombolysis (IVT) and endovascular therapy (EVT) were proven safe and effective for anterior circulation proximal occlusions. However, the most appropriate recanalization strategy in patients with acute basilar artery occlusion (BAO) is still controversial. This study aimed to assess outcomes of patients with BAO at an academic stroke center in Brazil. METHODS This is a retrospective analysis of consecutive patients with BAO from a prospective stroke registry at Ribeirão Preto Medical School. Primary outcomes were mortality and favorable outcome (modified Rankin score [mRS] ≤3) at 90 days. After univariate analyses, multivariate logistic regressions were used to identify independent predictors of primary outcomes. RESULTS Between August 2004 and December 2015, 63 (65% male) patients with BAO and median National Institutes of Health Stroke Scale (NIHSS) score of 31 (interquartile range: 19-36) were identified. Twenty-nine (46%) patients received no acute recanalization therapy, 15 (24%) received IVT, and 19 (30%) received EVT (68% treated with stent retrievers). Twenty-four (83%) patients treated conservatively died, and only 2 (7%) achieved an mRS less than or equal to 3. Among patients treated with acute recanalization therapies, 15 (44%) died, and 9 (26.5%) had a favorable outcome. On multivariate analysis, baseline systolic blood pressure (odds ratio [OR] = .97; 95% confidence interval [CI]: .95-0.99; P = .023), posterior circulation Alberta Stroke Program Early CT score (OR = .62; 95% CI: .41-0.94; P = .026), and successful recanalization (OR = .18; 95% CI: .04-0.71; P = .015) were independent predictors of lower mortality. Baseline NIHSS (OR = 1.40; 95% CI: 1.08-1.82; P = .012), prior use of statins (OR = .003; 95% CI: .001-0.28; P = .012), and successful recanalization (OR = .05; 95% CI: .001-0.27; P = .009) were independent predictors of favorable outcome. There was no significant difference between the IVT group and the EVT group on primary outcomes. CONCLUSIONS BAO is associated with high morbidity and mortality in Brazil. Access to acute recanalization therapies may decrease mortality in those patients.


Journal of Stroke & Cerebrovascular Diseases | 2017

Experience on Mechanical Thrombectomy for Acute Stroke Treatment in a Brazilian University Hospital

Guilherme Seizem Nakiri; Luis Henrique de Castro-Afonso; Lucas Moretti Monsignore; Francisco Antunes Dias; Frederico Fernandes Alessio-Alves; Soraia Ramos Cabete Fabio; Millene R Camilo; Pedro Telles Cougo-Pinto; João Pereira Leite; Octávio Marques Pontes-Neto; Daniel Giansante Abud

BACKGROUND Brazil is a developing country struggling to reduce its extreme social inequality, which is reflected on shortage of health-care infrastructure, mainly to the low-income class, which depends exclusively on the public health system. In Brazil, less than 1% of stroke patients have access to intravenous thrombolysis in a stroke unit, and constraints to the development of mechanical thrombectomy in the public health system increase the social burden of stroke. OBJECTIVE Report the feasibility of mechanical thrombectomy as part of routine stroke care in a Brazilian public university hospital. METHODS Prospective data were collected from all patients treated for acute ischemic stroke with mechanical thrombectomy from June 2011 to March 2016. Combined thrombectomy was performed in eligible patients for intravenous thrombolysis if they presented occlusion of large artery. For those patients ineligible for intravenous thrombolysis, primary thrombectomy was performed as long as there was no evidence of significant ischemia for anterior circulation stroke (Alberta Stroke Program Early CT score  >6) within a 6-hour time window, and also for those patients with wake-up stroke or posterior circulation stroke, regardless of the time of symptoms onset. RESULTS A total of 161 patients were evaluated, resulting in an overall successful recanalization rate of 76% and symptomatic intracranial hemorrhage rate of 6.8%. At 3 months, 36% of the patients had modified Rankin Scale score less than or equal to 2. The overall mortality rate was 23%. CONCLUSION Our study, the first ever large series of mechanical thrombectomy in Brazil, demonstrates acceptable efficacy and safety results, even under restricted conditions outside the ideal scenario of trial studies.

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