Abnormal exercise adaptation after varying severities of COVID-19: A controlled cross-sectional analysis of 392 survivors.

The multisystem impairment promoted by COVID-19 may be associated with a reduction in exercise capacity. Cardiopulmonary abnormalities can change across the acute disease severity spectrum. We aimed to verify exercise physiology differences between COVID-19 survivors and SARS-CoV-2-naïve controls and how illness severity influences exercise limitation. A single-centre cross-sectional analysis of prospectively collected data from COVID-19 survivors who underwent cardiopulmonary exercise testing (CPET) in their recovery phase (x = 50[36;72] days). Patients with COVID-19 were stratified according to severity as mild [M-Cov (outpatient)] vs severe/critical [SC-Cov(inpatients)] and were compared with SARS-CoV-2-naïve controls (N-Cov). Collected information included demographics, anthropometrics, previous physical exercise, comorbidities, lung function test and CPET parameters. A multivariate logistic regression analysis was performed to identify low aerobic capacity (LAC) predictors post COVID-19. Of the 702 included patients, 310 (44.2%), 305 (43.4%) and 87 (12.4%) were N-Cov, M-Cov and SC-Cov, respectively. LAC was identified in 115 (37.1%), 102 (33.4%), and 66 (75.9%) of N-CoV, M-CoV and SC-CoV, respectively (p < 0.001). SC-Cov were older, heavier with higher body fat, more sedentary lifestyle, more hypertension and diabetes, lower forced vital capacity, higher prevalence of early anaerobiosis, ventilatory inefficiency and exercise-induced hypoxia than N-Cov. M-Cov had lower weight, fat mass, and coronary disease prevalence and did not demonstrate more CEPT abnormalities than N-Cov. After adjustment for covariates, SC-Cov was an independent predictor of LAC (OR = 2.7; 95% CI, 1.3-5.6). Almost two months after disease onset, SC-CoV presented several exercise abnormalities of oxygen uptake, ventilatory adaptation and gas exchange, including a high prevalence of LAC.Highlights Weeks after the acute disease phase, one-third of mild and three-quarters of severe and critical patients with COVID-19 presented a reduced aerobic capacity. Previous studies including SARS-CoV-1 survivors observed much lower values.A severe or critical COVID-19 case was an independent predictor for low aerobic capacity.In our sample, pre-COVID-19 exercise significantly reduced the odds of post-COVID-19 low aerobic capacity. Even severe or critical patients who exercised regularly had a prevalence of low aerobic capacity 2.5 times lower than those who did not have this routine before sickening.

Prognostic Value of Troponin-T and B-Type Natriuretic Peptide in Patients Hospitalized for COVID-19. / Valor Prognóstico da Troponina T e do Peptídeo Natriurético Tipo B em Pacientes Internados por COVID-19.

BACKGROUND: COVID-19 causes severe pulmonary involvement, but the cardiovascular system can also be affected by myocarditis, heart failure and shock. The increase in cardiac biomarkers has been associated with a worse prognosis. OBJECTIVES: To evaluate the prognostic value of Troponin-T (TNT) and natriuretic peptide (BNP) in patients hospitalized for Covid-19. METHODS: This was a convenience sample of patients hospitalized for COVID-19. Data were collected from medical records to assess the association of TnT and BNP measured in the first 24 hours of hospital admission with the combined outcome (CO) of death or need for mechanical ventilation. Univariate analysis was used to compare the groups with and without the CO. Cox's multivariate model was used to determine independent predictors of the CO. RESULTS: We evaluated 183 patients (age = 66.8±17 years, 65.6% of which were males). The time of follow-up was 7 days (range 1 to 39 days). The CO occurred in 24% of the patients. The median troponin-T and BNP levels were 0.011 and 0.041ng/dL (p <0.001); 64 and 198 pg/dL (p <0.001), respectively, for the groups without and with the CO. In the univariate analysis, in addition to TnT and BNP, age, presence of coronary disease, oxygen saturation, lymphocytes, D-dimer, t-CRP and creatinine, were different between groups with and without outcomes. In the bootstrap multivariate analysis, only TnT (1.12 [95% CI 1.03-1.47]) and t-CRP (1.04 [95% CI 1.00-1.10]) were independent predictors of the CO. CONCLUSION: In the first 24h of admission, TnT, but not BNP, was an independent marker of mortality or need for invasive mechanical ventilation. This finding further reinforces the clinical importance of cardiac involvement in COVID-19. (Arq Bras Cardiol. 2020; 115(4):660-666).

FUNDAMENTO: A COVID-19 causa grave acometimento pulmonar, porém o sistema cardiovascular também pode ser afetado por miocardite, insuficiência cardíaca e choque. A elevação de biomarcadores cardíacos tem sido associada a um pior prognóstico. OBJETIVOS: Avaliar o valor prognóstico da Troponina T (TnT) e do peptídeo natriurético tipo B (BNP) em pacientes internados por Covid-19. MÉTODOS: Amostra de conveniência de pacientes hospitalizados por COVID-19. Foram coletados dados dos prontuários com o objetivo de avaliar a relação da TnT e o BNP medidos nas primeiras 24h de admissão com o desfecho combinado (DC) óbito ou necessidade de ventilação mecânica. Análise univariada comparou os grupos com e sem DC. Modelo multivariado de Cox foi utilizada para determinar preditores independentes do DC. RESULTADOS: Avaliamos 183 pacientes (idade=66,8±17 anos, sendo 65,6% do sexo masculino). Tempo de acompanhamento foi de 7 dias (1 a 39 dias). O DC ocorreu em 24% dos pacientes. As medianas de TnT e BNP foram 0,011 e 0,041 ng/dl (p<0,001); 64 e 198 pg/dl (p<0,001) respectivamente para os grupos sem e com DC. Na análise univariada, além de TnT e BNP, idade, presença de doença coronariana, saturação de oxigênio, linfócitos, dímero-D, proteína C reativa titulada (PCR-t) e creatinina, foram diferentes entre os grupos com e sem desfechos. Na análise multivariada boostraped apenas TnT (1,12[IC95%1,03-1,47]) e PCR-t (1,04[IC95%1,00-1,10]) foram preditores independentes do DC. CONCLUSÃO: Nas primeiras 24h de admissão, TnT, mas não o BNP, foi marcador independente de mortalidade ou necessidade de ventilação mecânica invasiva. Este dado reforça ainda mais a importância clínica do acometimento cardíaco da COVID-19. (AArq Bras Cardiol. 2020; 115(4):660-666).

Valor Prognóstico da Troponina T e do Peptídeo Natriurético Tipo B em Pacientes Internados por COVID-19 / Prognostic Value of Troponin-T and B-Type Natriuretic Peptide in Patients Hospitalized for COVID-19

Resumo Fundamento: A COVID-19 causa grave acometimento pulmonar, porém o sistema cardiovascular também pode ser afetado por miocardite, insuficiência cardíaca e choque. A elevação de biomarcadores cardíacos tem sido associada a um pior prognóstico. Objetivos: Avaliar o valor prognóstico da Troponina T (TnT) e do peptídeo natriurético tipo B (BNP) em pacientes internados por Covid-19. Métodos: Amostra de conveniência de pacientes hospitalizados por COVID-19. Foram coletados dados dos prontuários com o objetivo de avaliar a relação da TnT e o BNP medidos nas primeiras 24h de admissão com o desfecho combinado (DC) óbito ou necessidade de ventilação mecânica. Análise univariada comparou os grupos com e sem DC. Modelo multivariado de Cox foi utilizada para determinar preditores independentes do DC. Resultados: Avaliamos 183 pacientes (idade=66,8±17 anos, sendo 65,6% do sexo masculino). Tempo de acompanhamento foi de 7 dias (1 a 39 dias). O DC ocorreu em 24% dos pacientes. As medianas de TnT e BNP foram 0,011 e 0,041 ng/dl (p<0,001); 64 e 198 pg/dl (p<0,001) respectivamente para os grupos sem e com DC. Na análise univariada, além de TnT e BNP, idade, presença de doença coronariana, saturação de oxigênio, linfócitos, dímero-D, proteína C reativa titulada (PCR-t) e creatinina, foram diferentes entre os grupos com e sem desfechos. Na análise multivariada boostraped apenas TnT (1,12[IC95%1,03-1,47]) e PCR-t (1,04[IC95%1,00-1,10]) foram preditores independentes do DC. Conclusão: Nas primeiras 24h de admissão, TnT, mas não o BNP, foi marcador independente de mortalidade ou necessidade de ventilação mecânica invasiva. Este dado reforça ainda mais a importância clínica do acometimento cardíaco da COVID-19. (AArq Bras Cardiol. 2020; 115(4):660-666)

Abstract Background: COVID-19 causes severe pulmonary involvement, but the cardiovascular system can also be affected by myocarditis, heart failure and shock. The increase in cardiac biomarkers has been associated with a worse prognosis. Objectives: To evaluate the prognostic value of Troponin-T (TNT) and natriuretic peptide (BNP) in patients hospitalized for Covid-19. Methods: This was a convenience sample of patients hospitalized for COVID-19. Data were collected from medical records to assess the association of TnT and BNP measured in the first 24 hours of hospital admission with the combined outcome (CO) of death or need for mechanical ventilation. Univariate analysis was used to compare the groups with and without the CO. Cox's multivariate model was used to determine independent predictors of the CO. Results: We evaluated 183 patients (age = 66.8±17 years, 65.6% of which were males). The time of follow-up was 7 days (range 1 to 39 days). The CO occurred in 24% of the patients. The median troponin-T and BNP levels were 0.011 and 0.041ng/dL (p <0.001); 64 and 198 pg/dL (p <0.001), respectively, for the groups without and with the CO. In the univariate analysis, in addition to TnT and BNP, age, presence of coronary disease, oxygen saturation, lymphocytes, D-dimer, t-CRP and creatinine, were different between groups with and without outcomes. In the bootstrap multivariate analysis, only TnT (1.12 [95% CI 1.03-1.47]) and t-CRP (1.04 [95% CI 1.00-1.10]) were independent predictors of the CO. Conclusion: In the first 24h of admission, TnT, but not BNP, was an independent marker of mortality or need for invasive mechanical ventilation. This finding further reinforces the clinical importance of cardiac involvement in COVID-19. (Arq Bras Cardiol. 2020; 115(4):660-666)

Immediate postoperative of bariatric surgery in the intensive care unit versus an inpatient unit. A retrospective study with 828 patients. / Pós-operatório imediato de cirurgia bariátrica em unidade intensiva versus unidade de internação. Estudo retrospectivo com 828 pacientes.

OBJECTIVE: To compare the incidence of complications and the duration of hospitalization of patients undergoing bariatric surgery admitted to the intensive care unit or a post-surgical hospitalization unit. METHODS: This retrospective observational study included 828 patients admitted between January 2010 and February 2015 during the immediate postoperative period of bariatric surgery in a hospital. Data were collected via electronic medical records. The Mann-Whitney test was used to compare continuous variables, and the chi-square was used to compare categorical variables. RESULTS: Patients in both groups had similar demographic characteristics, with no significant differences in anthropometric data and comorbidities. There was no significant difference in the comparison of complications between the two groups. However, the group admitted to the intensive care unit had longer hospitalization times (median of 3 days versus 2 days, p < 0.05), and hospital costs were 8% higher. CONCLUSION: The present study found no benefit in the routine admittance of patients to the intensive care unit after undergoing bariatric surgery. This practice increased hospitalization time and hospital costs, which wasted resources. It is necessary to create objective criteria to identify patients requiring intensive care unit admission after bariatric surgery.

OBJETIVO: Comparar a incidência de complicações e a duração da hospitalização de pacientes submetidos à cirurgia bariátrica internados na unidade de terapia intensiva ou de internação pós-cirúrgica. MÉTODOS: Estudo observacional, retrospectivo, que incluiu 828 pacientes admitidos entre janeiro de 2010 e fevereiro de 2015 em pós-operatório imediato de cirurgia bariátrica em um hospital. Os dados foram coletados em prontuários eletrônicos. As variáveis contínuas foram comparadas utilizando-se o teste de Mann-Whitney e as categóricas, o qui quadrado. RESULTADOS: Os pacientes dos dois grupos possuíam características demográficas semelhantes, sem diferença significativa dos dados antropométricos e comorbidades. Comparando-se as complicações entre os dois grupos, não houve diferença significativa. No entanto, o grupo admitido na unidade de terapia intensiva teve maior tempo de internação (mediana de 3 dias versus 2 dias; p < 0,05) e custo hospitalar 8% maior. CONCLUSÃO: O presente estudo não encontrou nenhum benefício na internação rotineira de pacientes submetidos à cirurgia bariátrica em unidade de terapia intensiva. Esta prática aumentou o tempo de internação e o custo hospitalar, desperdiçando recursos. É necessária a criação de critérios objetivos para identificar pacientes que necessitem de internação em unidade de terapia intensiva após cirurgia bariátrica.

Doença de Creutzfeldt-Jakob: forma esporádica: relato de caso em paciente de 81 anos / Creutzfeldt-Jacob disease-sporadic form: case report of 81-year-old patient

As doenças priônicas são neurodegenerativas e possuem longo período de incubação, progredindo inexoravelmente, assim que os sintomas clínicos aparecem. A doença de Creutzfeldt-Jakob é a mais frequente das doenças priônicas, embora ainda seja rara. O quadro clínico dela é caracterizado por uma demência rapidamente progressiva, sintomas cerebelares e extrapiramidais, e a ressonância magnética, o eletroencefalograma e a análise do líquido cefalorraquidiano possuem achados típicos. Relatamos o caso de um paciente de 81 anos que se apresentou com declínio cognitivo rapidamente progressivo seguido, posteriormente, de mutismo acinético. Proteína 14-3-3 foi detectada no líquido cefalorraquidiano. A ressonância magnética revelou hipersinal do núcleo caudado e putâmen em imagem em difusão, T2 e FLAIR.(AU)

Prion diseases are neurodegenerative, and have long incubation periods, progressing inexorably once clinical symptoms appear. Creutzfeldt-Jakob disease (CJD) is the most frequent of the human prion diseases, although being still rare. The clinical picture of this disease is characterized by a rapidly progressing dementia, cerebellar and extrapyramidal symptoms, and rather specific magnetic resonance (MR), electroencephalography and cerebrospinal fluid (CSF) findings. We report the case of an 81-year-old patient who presented with rapidly progressive cognitive decline followed by akinetic mutism. Protein 14-3-3 in cerebrospinal fluid was detected. Magnetic resonance imaging findings revealed hyperintensity of the caudate and putamen in diffusion-weighted imaging, T2 Weighted sequences and FLAIR images. Patients who have progressive dementia should be evaluated by means of magnetic resonance imaging and cerebrospinal fluid analysis for Creutzfeldt-Jakob.(AU)

Pós-operatório imediato de cirurgia bariátrica em unidade intensiva versus unidade de internação. Estudo retrospectivo com 828 pacientes / Immediate postoperative of bariatric surgery in the intensive care unit versus an inpatient unit. A retrospective study with 828 patients

RESUMO Objetivo: Comparar a incidência de complicações e a duração da hospitalização de pacientes submetidos à cirurgia bariátrica internados na unidade de terapia intensiva ou de internação pós-cirúrgica. Métodos: Estudo observacional, retrospectivo, que incluiu 828 pacientes admitidos entre janeiro de 2010 e fevereiro de 2015 em pós-operatório imediato de cirurgia bariátrica em um hospital. Os dados foram coletados em prontuários eletrônicos. As variáveis contínuas foram comparadas utilizando-se o teste de Mann-Whitney e as categóricas, o qui quadrado. Resultados: Os pacientes dos dois grupos possuíam características demográficas semelhantes, sem diferença significativa dos dados antropométricos e comorbidades. Comparando-se as complicações entre os dois grupos, não houve diferença significativa. No entanto, o grupo admitido na unidade de terapia intensiva teve maior tempo de internação (mediana de 3 dias versus 2 dias; p < 0,05) e custo hospitalar 8% maior. Conclusão: O presente estudo não encontrou nenhum benefício na internação rotineira de pacientes submetidos à cirurgia bariátrica em unidade de terapia intensiva. Esta prática aumentou o tempo de internação e o custo hospitalar, desperdiçando recursos. É necessária a criação de critérios objetivos para identificar pacientes que necessitem de internação em unidade de terapia intensiva após cirurgia bariátrica.

ABSTRACT Objective: To compare the incidence of complications and the duration of hospitalization of patients undergoing bariatric surgery admitted to the intensive care unit or a post-surgical hospitalization unit. Methods: This retrospective observational study included 828 patients admitted between January 2010 and February 2015 during the immediate postoperative period of bariatric surgery in a hospital. Data were collected via electronic medical records. The Mann-Whitney test was used to compare continuous variables, and the chi-square was used to compare categorical variables. Results: Patients in both groups had similar demographic characteristics, with no significant differences in anthropometric data and comorbidities. There was no significant difference in the comparison of complications between the two groups. However, the group admitted to the intensive care unit had longer hospitalization times (median of 3 days versus 2 days, p < 0.05), and hospital costs were 8% higher. Conclusion: The present study found no benefit in the routine admittance of patients to the intensive care unit after undergoing bariatric surgery. This practice increased hospitalization time and hospital costs, which wasted resources. It is necessary to create objective criteria to identify patients requiring intensive care unit admission after bariatric surgery.

Changing sedative infusion from propofol to midazolam improves sublingual microcirculatory perfusion in patients with septic shock.

PURPOSE: The goal of this study was to explore possible microcirculatory alterations by changing sedative infusion from propofol to midazolam in patients with septic shock. MATERIALS AND METHODS: Patients (n=16) were sedated with propofol during the first 24 hours after intubation, then with midazolam, following a predefined algorithm. Systemic hemodynamics, perfusion parameters, and microcirculation were assessed at 2 time points: just before stopping propofol and 30 minutes after the start of midazolam infusion. Sublingual microcirculation was evaluated by sidestream dark-field imaging. RESULTS: The microvascular flow index and the proportion of perfused small vessels were greater when patients were on midazolam than when on propofol infusion (2.8 [2.4-2.9] vs 2.3 [1.9-2.6] and 96.4% [93.7%-97.6%] vs 92.7% [88.3%-94.7%], respectively; P<.005), and the flow heterogeneity index was greater with propofol than with midazolam use (0.49 [0.2-0.8] vs 0.19 [0.1-0.4], P<.05). There were no significant changes in systemic hemodynamics and perfusion parameters either during propofol use or during midazolam infusions. Data are presented as median (25th-75th percentiles). CONCLUSIONS: In this study, sublingual microcirculatory perfusion improved when the infusion was changed from propofol to midazolam in patients with septic shock. This observation could not be explained by changes in systemic hemodynamics.

Complicações pós-operatórias de pacientes com dissecção de aorta ascendente tratados cirurgicamente / Postoperative complications of surgically treated ascending aortic dissection

OBJETIVOS: A dissecção da aorta ascendente tem prognóstico ruim se não for corrigido cirurgicamente. Mesmo após a cirurgia, o manuseio pós-operatório é temido pelo seu curso complicado. Nosso objetivo foi descrever a incidência de complicações pós-operatórias e mortalidade em 1 e 6 meses de pacientes submetidos a cirurgia de correção de dissecção ou aneurisma da aorta ascendente; secundariamente a comparação foi realizada com pacientes pareados submetidos a revascularização miocárdica de urgência. MÉTODOS: Uma análise retrospectiva de banco de dados preenchido prospectivamente de Fevereiro de 2005 a Junho de 2008 revelou 12 pacientes com dissecção da aorta ascendente e 10 com aneurisma de aorta eletivos, analisando demografia e características per-operatórias. Pacientes com dissecção da aorta ascendente foram comparados a pacientes com revascularização miocárdica de acordo com idade (± 3 anos), gênero, procedimento urgente/eletivo e equipe cirúrgica. O principal desfecho foi morbidade (complicações pós-operatórias e tempo de permanência na unidade de terapia intensiva e no hospital). RESULTADOS: Vinte e dois pacientes foram operados para correção de dissecção da aorta ascendente e aneurisma de aorta eletivos, enquanto 246 pacientes foram submetidos à revascularização miocárdica. Pacientes com dissecção da aorta ascendente e aneurisma de aorta eletivos eram semelhantes, exceto pelo maior tempo de ventilação mecânica e de internação hospitalar. Depois do pareamento entre pacientes de revascularização miocárdica e dissecção da aorta ascendente, resultados significativamente piores foram encontrados para este ultimo grupo: maior incidência de complicações pós-operatórias (91 vs 45 por cento, p=0,03) e maior tempo de permanência hospitalar (34,6 ± 35,8 vs 12,9 ± 8,5 dias, p=0,05). Não houve diferença na mortalidade em 1 mês (8,3 por cento) e 6 meses (16,6 por cento) entre os grupos. CONCLUSÃO: A correção da dissecção da aorta ascendente está associada à incidência aumentada de complicações pós-operatórias e tempo de permanência hospitalar, mas a mortalidade em 1 e 6 meses é igual a de pacientes após revascularização miocárdica pareados.

OBJECTIVES: Ascending aortic dissection has a poor prognosis if it is not promptly corrected surgically. Even with surgical correction, postoperative management is feared because of its complicated course. Our aim was to describe the incidence of postoperative complications and identify the 1 and 6-month mortality rate of our ascending aortic dissection surgical cohort. Secondarily, a comparison was made between ascending aortic dissection patients and paired-matched patients who received urgent coronary artery bypass graft surgery. METHODS: A retrospective analysis of a prospectively-collected database from February 2005 through June 2008 revealed 12 ascending aortic dissection and 10 elective ascending aortic aneurysm repair patients. These patients were analyzed for demographic and perioperative characteristics. Ascending aortic dissection patients were compared to paired-matched coronary artery bypass graft surgery patients according to age (± 3 years), gender, elective/urgent procedure and surgical team. The main outcome was in-hospital morbidity, defined by postoperative complications, intensive care unit admission and hospital length of stay. RESULTS: Twenty-two patients received operations to correct ascending aortic dissections and ascending aortic aneurysms, while 246 patients received coronary artery bypass graft surgeries. Ascending aortic dissection patients were notably similar to ascending aortic aneurysm brackets, except for longer mechanical ventilation times and lengths of stay in the hospital. After matching coronary artery bypass graft surgery patients to an ascending aortic dissection group, the following significantly worse results were found for the Aorta group: higher incidence of postoperative complications (91 percent vs. 45 percent, p=0.03), and longer hospital length of stay (19 [11-41] vs. 12.5 [8.5-13] days, p=0.05). No difference in mortality was found at the 1-month (8.3 percent) or 6-month (16.6 percent) postoperative care date. CONCLUSION: Ascending aortic dissection correction is associated with an increased incidence of postoperative complications and an increased hospital length of stay, but 1 and 6-month mortality is similar to that of paired-matched coronary artery bypass graft surgery patients.

Avaliação da microcirculação: uma nova arma no manejo da sepse? / Microcirculatory assessment: a new weapon in the treatment of sepsis?

A evolução para disfunção de múltiplos órgãos ainda é comum na sepse e está relacionada diretamente com a disfunção microcirculatória. Através de pesquisa nas bases de dados PubMed, empregando-se os unitermos microcirculação e sepse, vinte e seis artigos foram selecionados para esta revisão, bem como citações consideradas relevantes extraídas de artigos de revisão. Com o advento da técnica de imagem obtida através de polarização ortogonal, que permite a observação à beira do leito da microcirculação em pacientes críticos, é possível estabelecer uma relação entre disfunção microvascular e prognóstico, além de observar diretamente o efeito de diferentes intervenções terapêuticas. No entanto, a relação causal entre disfunção microcirculatória e prognóstico adverso na sepse, bem como os efeitos de terapias dirigidas para correção destas anormalidades microcirculatórias ainda precisam ser melhor definidos.

The progression into multi-organ failure continues to be a common feature of sepsis and is directly related to microcirculatory dysfunction. Based on a PubMed database search using the key words microcirculation and sepsis, twenty-six articles were selected for this review. The relevant references from these articles were also selected and included in this analysis. Orthogonal polarization spectral imaging allows for the bedside assessment of the microcirculation of critically ill patients. Such imaging has established a correlation between microvascular dysfunction and patient outcomes, which allows practitioners to directly assess the effects of therapeutic interventions. However, the causal relationships between microcirculatory dysfunction, adverse outcomes, and the effects of therapies aimed at these microcirculatory changes in sepsis, are not clear.

Síndrome do desconforto respiratório agudo secundária à infecção por influenza A H1N1 / Acute respiratory distress syndrome secondary to Influenza A H1N1 infection

O objetivo desta revisão foi descrever as possíveis complicações respiratórias decorrentes da infecção pelo vírus influenza A H1N1, sua fisiopatologia, diagnóstico e opções terapêuticas. Enquanto a maioria das infecções por influenza desenvolve uma doença leve e autolimitada, alguns casos podem evoluir para insuficiência respiratória aguda hipoxêmica ao desenvolver um quadro de síndrome do desconforto respiratório agudo (SDRA). Em 2009, durante a epidemia de influenza H1N1, ocorreram vários relatos de pacientes com hipoxemia que vinham a necessitar de suporte ventilatório (invasivo ou não invasivo). Casos graves da doença foram relatados mais frequentemente em alguns grupos específicos, tais como gestantes e, surpreendentemente, em jovens sem comorbidades. As taxas de admissão e óbito em unidades de terapia intensiva foram bem superiores às observadas nos casos de influenza sazonal. Desde seu descobrimento em 2009, a pneumonia viral relacionada ao H1N1 se tornou uma importante e reconhecida causa de insuficiência respiratória hipoxêmica em todo o mundo. Logo, o imediato reconhecimento da SDRA secundária ao H1N1 e sua imediata terapia ventilatória acarretam melhor prognóstico.

The aim of the present review was to describe the respiratory complications that can occur after infection with the influenza A (H1N1) virus, as well as the pathophysiology of the infection, its diagnosis, and the therapeutic options.Although most influenza infections are mild and self-limiting, cases in which the patient develops acute respiratory distress syndrome (ARDS) can progress to hypoxemic acute respiratory failure. In 2009, during the H1N1 influenza epidemic, there were several reports of hypoxemic patients requiring invasive or noninvasive ventilatory support. One unexpected aspect of the epidemic was that such cases were more prevalent in pregnant women and young people without comorbidities. The rates of admission to and mortality in the intensive care unit were above those observed among cases of seasonal influenza. Since its identification in 2009, H1N1 pneumonia has become a leading cause of hypoxemic respiratory failure worldwide. Early recognition of H1N1-induced ARDS and prompt initiation of ventilatory support can improve prognoses in cases of ARDS secondary to H1N1 infection.

Postoperative complications of surgically treated ascending aortic dissection. / Complicações pós-operatórias de pacientes com dissecção de aorta ascendente tratados cirurgicamente.

OBJECTIVES: Ascending aortic dissection has a poor prognosis if it is not promptly corrected surgically. Even with surgical correction, postoperative management is feared because of its complicated course. Our aim was to describe the incidence of postoperative complications and identify the 1 and 6-month mortality rate of our ascending aortic dissection surgical cohort. Secondarily, a comparison was made between ascending aortic dissection patients and paired-matched patients who received urgent coronary artery bypass graft surgery. METHODS: A retrospective analysis of a prospectively-collected database from February 2005 through June 2008 revealed 12 ascending aortic dissection and 10 elective ascending aortic aneurysm repair patients. These patients were analyzed for demographic and perioperative characteristics. Ascending aortic dissection patients were compared to paired-matched coronary artery bypass graft surgery patients according to age (± 3 years), gender, elective/urgent procedure and surgical team. The main outcome was in-hospital morbidity, defined by postoperative complications, intensive care unit admission and hospital length of stay. RESULTS: Twenty-two patients received operations to correct ascending aortic dissections and ascending aortic aneurysms, while 246 patients received coronary artery bypass graft surgeries. Ascending aortic dissection patients were notably similar to ascending aortic aneurysm brackets, except for longer mechanical ventilation times and lengths of stay in the hospital. After matching coronary artery bypass graft surgery patients to an ascending aortic dissection group, the following significantly worse results were found for the Aorta group: higher incidence of postoperative complications (91% vs. 45%, p=0.03), and longer hospital length of stay (19 [11-41] vs. 12.5 [8.5-13] days, p=0.05). No difference in mortality was found at the 1-month (8.3%) or 6-month (16.6%) postoperative care date. CONCLUSION: Ascending aortic dissection correction is associated with an increased incidence of postoperative complications and an increased hospital length of stay, but 1 and 6-month mortality is similar to that of paired-matched coronary artery bypass graft surgery patients.

Microcirculatory assessment: a new weapon in the treatment of sepsis? / Avaliação da microcirculação: uma nova arma no manejo da sepse?

The progression into multi-organ failure continues to be a common feature of sepsis and is directly related to microcirculatory dysfunction. Based on a PubMed database search using the key words microcirculation and sepsis, twenty-six articles were selected for this review. The relevant references from these articles were also selected and included in this analysis. Orthogonal polarization spectral imaging allows for the bedside assessment of the microcirculation of critically ill patients. Such imaging has established a correlation between microvascular dysfunction and patient outcomes, which allows practitioners to directly assess the effects of therapeutic interventions. However, the causal relationships between microcirculatory dysfunction, adverse outcomes, and the effects of therapies aimed at these microcirculatory changes in sepsis, are not clear.

Comparação entre as variações respiratórias da amplitude de onda pletismográfica da oximetria de pulso e do pulso arterial em pacientes com e sem uso de norepinefrina / Comparison between respiratory pulse oximetry plethysmographic waveform amplitude and arterial pulse pressure variations among patients with and without norepinephrine use

OBJETIVOS: A variação respiratória da pressão arterial é um bom preditor da resposta a fluidos em pacientes ventilados. Foi recentemente demonstrado que a variação respiratória na pressão arterial de pulso se correlaciona com a variação da amplitude da onda pletismográfica da oximetria de pulso. Nossa intenção foi avaliar a correlação entre a variação respiratória da pressão arterial de pulso e a variação respiratória na amplitude da onda pletismográfica da oximetria de pulso, e determinar se esta correlação foi influenciada pela administração de norepinefrina. MÉTODOS: Estudo prospectivo de sessenta pacientes com ritmo sinusal normal sob ventilação mecânica, profundamente sedados e hemodinamicamente estáveis. Foram monitorados o índice de oxigenação e pressão arterial invasiva. A variação respiratória da pressão do pulso e a variação respiratória da amplitude da onda pletismográfica na oximetria de pulso foram registradas simultaneamente batimento a batimento, e foram comparadas utilizando o coeficiente de concordância de Pearson e regressão linear. RESULTADOS: Trinta pacientes (50 por cento) necessitaram de norepinefrina. Ocorreu uma correlação significante (K=0,66; p<0,001) entre a variação respiratória na pressão arterial de pulso e a variação respiratória na amplitude de onda pletismográfica na oximetria de pulso. A área sob a curva ROC foi de 0,88 (variando de 0,79-0,97) com melhor valor de corte de 14 por cento para prever uma variação respiratória na pressão arterial de pulso de 13. O uso de norepinefrina não influenciou esta correlação (K=0,63; p=0,001, respectivamente). CONCLUSÕES: Uma variação respiratória na pressão do pulso arterial acima de 13 por cento pode ser prevista com precisão por meio de uma variação respiratória da amplitude de onda pletismográfica na oximetria de pulso de 14 por cento. O uso de norepinefrina não modifica este relacionamento.

OBJECTIVES: Arterial pulse pressure respiratory variation is a good predictor of fluid response in ventilated patients. Recently, it was shown that respiratory variation in arterial pulse pressure correlates with variation in pulse oximetry plethysmographic waveform amplitude. We wanted to evaluate the correlation between respiratory variation in arterial pulse pressure and respiratory variation in pulse oximetry plethysmographic waveform amplitude, and to determine whether this correlation was influenced by norepinephrine administration. METHODS: Prospective study of sixty patients with normal sinus rhythm on mechanical ventilation, profoundly sedated and with stable hemodynamics. Oxygenation index and invasive arterial pressure were monitored. Respiratory variation in arterial pulse pressure and respiratory variation in pulse oximetry plethysmographic waveform amplitude were recorded simultaneously in a beat-to-beat evaluation, and were compared using the Pearson coefficient of agreement and linear regression. RESULTS: Thirty patients (50 percent) required norepinephrine. There was a significant correlation (K = 0.66; p < 0.001) between respiratory variation in arterial pulse pressure and respiratory variation in pulse oximetry plethysmographic waveform amplitude. Area under the ROC curve was 0.88 (range, 0.79 - 0.97), with a best cutoff value of 14 percent to predict a respiratory variation in arterial pulse pressure of 13. The use of norepinephrine did not influence the correlation (K = 0.63, p = 0.001, respectively). CONCLUSIONS: Respiratory variation in arterial pulse pressure above 13 percent can be accurately predicted by a respiratory variation in pulse oximetry plethysmographic waveform amplitude of 14 percent. The use of norepinephrine does not alter this relationship.

Fatores preditores precoces de reinternação em unidade de terapia intensiva / Early predictive factors for intensive care unit readmission

OBJETIVOS: Prever reinternação na unidade de terapia intensiva, analisando as primeiras 24 horas de pacientes após admissão em unidade de terapia intensiva. MÉTODOS: A primeira internação de pacientes de janeiro a maio de 2009 em UTI geral foi estudada. Considerou-se reinternação em unidade de terapia intensiva na mesma permanência hospitalar ou retorno em até 3 meses após alta da unidade. Pacientes que faleceram na 1ª admissão foram excluídos. Fatores demográficos, uso de assistência ventilatória e permanência na unidade de terapia intensiva por mais de 3 dias foram analisadas de forma uni e multivariada de acordo com desfecho reinternação. RESULTADOS: Quinhentos e setenta e sete pacientes foram incluídos (33 óbitos excluídos). O grupo de reinternação foi 59 pacientes, e 518 não reinternados. O tempo entre admissão índice e reinternação foi 9 (3-28) dias (18 foram readmitidos com menos de 3 dias) e 10 faleceram. Os pacientes reinternados pelo menos 1 vez na unidade de terapia intensiva apresentaram as seguintes diferenças em relação ao grupo controle: maior idade: 75 (67-81) versus 67 (56-78) anos, p<0,01; admissão por insuficiência respiratória e/ou sepse: 33 versus 13 por cento, p<0,01; admissão clínica: 49 versus 32 por cento, p<0,05; maior SAPS II: 27 (21-35) versus 23 (18-29) pontos, p<0,01; Charlson: 2 (1-2) versus 1 (0-2) pontos, p<0,01 e permanência maior que 3 dias na unidade de terapia intensiva na 1ª admissão (35 versus 23 por cento, p<0,01). Após regressão logística, idade, índice de Charlson e admissão por causas respiratórias ou sepse foram independentemente associados às reinternações em unidade de terapia intensiva. CONCLUSÃO: Idade, comorbidades e admissão por insuficiência respiratória e/ou sepse estão precocemente associadas a maior risco de reinternações na unidade de terapia intensiva estudada.

OBJECTIVE: To predict readmission in intensive care unit analyzing the first 24 hours data after intensive care unit admission. METHODS: The first intensive care unit admission of patients was analyzed from January to May 2009 in a mixed unit. Readmission to the unit was considered those during the same hospital stay or within 3 months after intensive care unit discharge. Deaths during the first admission were excluded. Demographic data, use of mechanical ventilation, and report of stay longer than 3 days were submitted to uni and multivariate analysis for readmission. RESULTS: Five hundred seventy-seven patients were included (33 excluded deaths). The readmission group had 59 patients, while 518 patients were not readmitted. The lead time between the index admission and readmission was 9 (3-28) days (18 were readmitted in less than 3 days), and 10 died. Patients readmitted at least once to the intensive care unit had the differences below in comparison to the control group: older age: 75 (67-81) versus 67 (56-78) years, P<0.01; admission for respiratory insufficiency or sepsis: 33 versus 13 percent, P<0.01; medical admission: 49 versus 32 percent, P<0.05; higher SAPS II score: 27 (21-35) versus 23 (18-29) points, P<0.01; Charlson index: 2 (1-2) versus 1 (0-2) points, P<0.01; first ICU stay longer than 3 days: 35 versus 23 percent, P<0.01. After logistic regression, higher age, Charlson index and admission for respiratory and sepsis were independently associated to readmissions in intensive care unit. CONCLUSION: Age, comorbidities and respiratory- and/or sepsis-related admission are associated with increased readmission risk in the studied sample.

Prevenção e tratamento de náuseas e vômitos no período pós-operatório / Prevention and treatment of postoperative nausea and vomiting

Náuseas e vômitos pós-operatórios são comuns e podem ser evitados. Complicações provenientes deste problema acarretam aumento de morbi-mortalidade. Foi realizada revisão de literatura no MEDLINE, com foco em estudos clínicos controlados. A fisiopatologia é complexa, com várias vias centrais aferentes e eferentes, e seu entendimento ajuda na escolha das medicações. Fatores de risco são apresentados, com escala de estratificação de chance para desenvolvimento de náuseas e vômitos pósoperatórios. Algoritmo para abordagem de pacientes com maior risco foi elaborado e estratifica nível de prevenção/tratamento a ser recebido, de modo a evitar uso excessivo de drogas e seus paraefeitos. Náuseas e vômitos pós-operatórios devem ser prevenidos, pois acarretam complicações e desconforto nos pacientes. Abordagem sistemática com análise de fatores de risco per-operatórios e prescrição de medicações podem ser eficazes para sua prevenção.

Postoperative nausea and vomiting are common and can be prevented. Complications of this condition cause higher rates of morbidity and mortality. A review of literature was carried out on MEDLINE, with focus on controlled clinical trials. Pathophysiology is complex, with many afferent and efferent pathways, and its comprehension facilitate the choice of medication. Risk factors are presented, with a stratified score of chance to develop postoperative nausea and vomiting. An algorithm for identification of higher risk patients was elaborated and classified the level of prevention/treatment recommended to avoid excessive use of drugs and their side effects. Postoperative nausea and vomiting must be prevented, because of the involved complications and discomfort for patients. A systematic approach with analysis of preoperative risk factors and prescription of medication can be effective for prevention.

Prevention and treatment of postoperative nausea and vomiting. / Prevenção e tratamento de náuseas e vômitos no período pós-operatório.

Postoperative nausea and vomiting are common and can be prevented. Complications of this condition cause higher rates of morbidity and mortality. A review of literature was carried out on MEDLINE, with focus on controlled clinical trials. Pathophysiology is complex, with many afferent and efferent pathways, and its comprehension facilitate the choice of medication. Risk factors are presented, with a stratified score of chance to develop postoperative nausea and vomiting. An algorithm for identification of higher risk patients was elaborated and classified the level of prevention/treatment recommended to avoid excessive use of drugs and their side effects. Postoperative nausea and vomiting must be prevented, because of the involved complications and discomfort for patients. A systematic approach with analysis of preoperative risk factors and prescription of medication can be effective for prevention.