CLINICS 2010;65(4):441-5 walk test in patients with cystic fibrosis.45 Oliveira et al. reviewed the relationships between the walk test, pulmonary function tests and length of hospitalization in cardiac surgery patients.5 Bertolace et al. studied the association between obesity and asthma among teenagers.46 Simões et al. assessed the prevalence of reduced respiratory muscle strength in institutionalized elderly people.47 Sleep desaturation and its influence on arterial pressure in COPD patients were the subjects of a study by Aidar et al.19 Malbouisson et al. showed that lung hyperinflation stimulates the release of inflammatory mediators in spontaneously breathing subjects.48 The association between nutritional status measurements and pulmonary function in children and adolescents with cystic fibrosis was analyzed by Chavez et al.49 Bandeira et al. demonstrated the prevalence of gastro-esophageal reflux disease in patients with idiopathic pulmonary fibrosis.50 Costa et al. described the role of inflammatory cells and their mediators in COPD pathogenesis.51 Perrechi and Ribeiro surveyed the effort to integrate tuberculosis REFERENCES A review of cardiopulmonary research in Brazilian medical journals Serrano C, Rocha-e-Silva M. A treatment between hospitals and public health care clinics in the city of Sao Paulo, Brazil.52 Cataneo et al. described the occurrence of active tuberculosis in surgical patients with negative preoperative sputum smear results.53 Parra et al. studied the occurrence of systemic sclerosis, idiopathic interstitial pneumonia and histomorphometric differences in lung biopsies.54 Epidemiological studies. The incidence of metabolic syndrome has been examined in multiple Brazilian studies.55-60 The prevalence of congenital heart disease in patients with Down’s syndrome was reported.61 Two different studies evaluated cardiovascular mortality in different parts of Brazil.62, 63 The profile of newborns who underwent cardiac surgery in a private hospital in the city of Sao Paulo was described.64 Other studies examined diseases of the circulatory system, asthma, tuberculosis, hypertension and smoking in specific geographic settings.65-71 1. 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