Luiz Carlos Marques Vanderlei

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BACKGROUND: Failure to wean can prolong ICU stay, increase complications associated with mechanical ventilation, and increase morbidity and mortality. The spontaneous breathing trial (SBT) is one method used to assess weaning. The aim of this study was to assess proportional assist ventilation plus (PAV ) as an SBT by comparing its applicability, safety,(More)
OBJECTIVE The aim of the present study was to identify risk factors for the occurrence of sport injuries in dancers related to anthropometric variables, training, and specific dance characteristics. DESIGN One-year, retrospective, cross-sectional study. SETTING 26th Dance Festival of Joinville (Brazil), 2008. PARTICIPANTS Five hundred dancers (409(More)
OBJECTIVE To compare the autonomic behavior between malnourished children and a control group using analysis of heart rate variability (HRV). METHOD Data were analyzed from 70 children who were divided into two groups: malnourished and eutrophic, according to the Z-score nutritional status for height and age. For analysis of HRV indices, heart rate was(More)
The Polar® RS800G3™ rate monitor was released in the market to replace the Polar® S810i™, and few studies have assessed that the RR series obtained by this equipment is reliable for analysis of heart rate variability (HRV). We compared HRV indexes among the devices Polar® RS800G3™, Polar® S810i™ and eletrocardiogram (ECG) to know whether the series of(More)
The Poincaré plot for heart rate variability analysis is a technique considered geometrical and non-linear, that can be used to assess the dynamics of heart rate variability by a representation of the values of each pair of R-R intervals into a simplified phase space that describes the system's evolution. The aim of the present study was to verify if there(More)
BACKGROUND It was reported that autonomic nervous system function is altered in subjects with chronic obstructive pulmonary disease (COPD). We evaluated short- and long-term fractal exponents of heart rate variability (HRV) in COPD subjects. PATIENTS AND METHODS We analyzed data from 30 volunteers, who were divided into two groups according to spirometric(More)
INTRODUCTION Obesity causes alterations in cardiac autonomic function. However, there are scarce and conflicting data on this function with regard to heart rate variability in obese children. OBJECTIVE To compare the autonomic function of obese and eutrophic children by analyzing heart rate variability. METHODS One hundred twenty-one children (57 male(More)
BACKGROUND Smoking affects the autonomic function. OBJECTIVE To investigate the acute effects of smoking on the autonomic modulation and the post-smoking recovery of the heart rate variability (HRV) index through Poincaré plot and linear indices. METHODS A total of 25 young smokers underwent beat-to-beat analysis of heart rate in the sitting position(More)
OBJECTIVE To determine the effectiveness of oscillating positive expiratory pressure (OPEP) using predetermined expiratory pressures on the viscosity and transportability of sputum in patients with bronchiectasis. METHODS The study involved 15 stable patients with bronchiectasis (7 males; mean age = 53 +/- 16 years), submitted to two consecutive OPEP(More)
In this article we compare how sensitivity to the chronotropic effect of noradrenaline and adrenaline of right atria isolated from female rats is modified after repeated swimming or foot-shock stress, under the influence of the estrous cycle. Right atria from stressed female rats sacrificed at diestrus were subsensitive to both catecholamines, irrespective(More)