Pacemaker Implants in Children and Adolescents with Chagas Disease in Brazil: 18-Year Incidence.

Background:: Chagas disease continues to be a serious public health problem, and accounts for 25-30% of the indications for cardiac stimulation in Brazil.

Objective:: To assess clinical and epidemiological characteristics of patients with Chagas disease, younger than 18 years, who had undergone pacemaker implantation in Brazil between 1994 and 2011, and its temporal trend.

Methods:: This was a cross-sectional analysis of data from the Brazilian Pacemaker Registry database.

[Evaluation of venous thromboembolism prophylaxis in a high complexity hospital].

Objective: This study aimed at assessing the adequacy of thromboprophylaxis in a high complexity hospital in Vitória-ES, analysing the possible predictors of inadequate prescriptions and/or procedures.

Methods: A cross-sectional study was carried out through prompt-book analysis. The included patients were hospitalized in 2007 and had their Venous thromboembolism (VTE) risk stratified using the 8th Edition of the American College of Chest Physicians (ACCP) Evidence-Based Clinical Practice Guidelines.

Acute resistance exercise reduces blood pressure and vascular reactivity, and increases endothelium-dependent relaxation in spontaneously hypertensive rats.

The aim of the present study was to assess the effects of acute dynamic resistance exercise on resting blood pressure (BP) and on endothelial function of vascular bed of spontaneously hypertensive rats. Hemodynamic measurements were performed before and after acute dynamic resistance exercise in conscious animals. After exercise, the tail artery was cannulated for mean perfusion pressure with constant flow measurement and for performing concentration-response curves to acetylcholine (ACh) and sodium nitroprusside (SNP) and dose-response curves to phenylephrine (PHE).