José Valdivia Osorio

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BACKGROUND Uninterrupted oral anticoagulant (OA) therapy with warfarin has become the standard of care at many centers performing catheter ablation of atrial fibrillation (AF). Compared with warfarin, dabigatran, a direct thrombin inhibitor, has been demonstrated to reduce the risk of stroke in nonvalvular AF with similar bleeding risk. Few data exist on(More)
BACKGROUND During resuscitation, fibrillation often recurs. In swine, we studied refibrillation after long-duration ventricular fibrillation, investigating an association with chest compressions (CCs). METHODS AND RESULTS In protocol A, 47 episodes of long-duration ventricular fibrillation lasting at least 2.5 minutes were induced in 8 animals. After(More)
Infection with T cruzi through blood transfusion is an important public health problem in Latin America, including Chile. A study on the sensitivity, specificity and applicability of currently applied methods was performed. Ten commercially available products were tested in a panel of 180 blood specimens against the indirect immunofluorescence antibody test(More)
Dr. Yamada is supported by a research grant from Boston Scientific and St. Jude Medical. Drs. Kay and McElderry have participated in catheter research funded by Biosense-Webster and Irvine Biomedical. Dr. Kay has received honoraria from Medtronic, Boston Scientific, and St. Jude Medical. Dr. McElderry has received consulting fees from Boston Scientific, St.(More)
External mechanical forces can cause ventricular capture and fibrillation (i.e., commotio cordis). In animals, we showed that chest compressions (CCs) can also cause the phenomenon. The aim of the present study was to determine whether ventricular capture by CCs occurs in humans. Electronic rhythm strips were analyzed in 31 cases of out-of-hospital cardiac(More)
BACKGROUND Maximal oxygen uptake is considered by the International Biological Programme as the international standard of cardiorespiratory adequacy and physical condition. AIM To measure maximal oxygen uptake in normal Chilean subjects, to establish normal reference values. SUBJECTS AND METHODS Maximal oxygen uptake was measured in 2,203 subjects (451(More)
The maxillary sinus (MS) is described as a pyramid-shaped cavity of the maxilla. Knowledge of its morphology makes it possible to define normality and abnormality so that its three-dimensional analysis can be a valuable preoperative tool during surgery in this anatomical area. The aim of this study is to present a strategy of morphological analysis of the(More)
PURPOSE The aim of this research was to determine whether rigid internal fixation interferes with mandibular growth and development in growing New Zealand white rabbits with induced mandibular fractures. MATERIALS AND METHODS Ten 3-month-old New Zealand white rabbits were included in the study. Surgical fractures were performed in the right mandibular(More)
BACKGROUND While continuation of oral anticoagulation (OAC) with warfarin may be preferable to interruption and bridging with heparin for patients undergoing cardiovascular implantable electronic device (CIED) implantation, it is uncertain whether the same strategy can be safely used with dabigatran. OBJECTIVE AND METHODS To determine the risk of bleeding(More)
A nutritional caloric supplement as bar in 5 different flavours was evaluated in 9 sportsmen that ate daily 1040 Kcal/100 g extra during 8 weeks. Anthropometric measurements were used for weight, body fat, lean body mass and functional test for VO2 max, anaerobic threshold (AnT) and anaerobic power (AnP). Both tolerance and acceptability were evaluated too.(More)