Eliza Ribas da Silveira Flôres

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A recurrence of stenosis (restenosis) following successful coronary angioplasty continues to be a frequent problem limiting the long-term efficacy of the procedure. An overexuberant reparative response to the arterial injury induced by balloon dilatation leads to intimal hyperplasia, the major mechanism responsible for restenosis. Although none has yet been(More)
STUDY OBJECTIVE To determine whether beta-adrenergic blockade augments cocaine-induced coronary artery vasoconstriction. DESIGN Randomized, double-blind, placebo-controlled trial. SETTING A cardiac catheterization laboratory in an urban teaching hospital. PATIENTS Thirty clinically stable patient volunteers referred for catheterization for evaluation(More)
Cocaine increases myocardial oxygen demand and paradoxically decreases oxygen supply by reducing coronary blood flow. Such "inappropriate" vasoconstriction also occurs with exercise, which causes intense vasoconstriction of coronary artery segments narrowed by atherosclerosis. This study was done to assess the cocaine-induced change in vasomotor tone of(More)
STUDY OBJECTIVE To assess the natural history of isolated left ventricular diastolic dysfunction. PATIENTS AND METHODS Follow-up (average duration, 68 months) was obtained in 51 patients with isolated left ventricular diastolic dysfunction at cardiac catheterization, characterized by (1) an elevated left ventricular end-diastolic pressure; (2) normal left(More)
OBJECTIVE This study was performed to evaluate the potential influence of cytological differences between pleural effusions on the survival of women with metastatic breast cancer during 30 months of follow-up. STUDY DESIGN A hospital-based cohort study was performed. Pleural fluid cytology slides from patients with breast cancer were examined. Cases were(More)
For the detection of left-to-right intracardiac shunting, the oximetric and standard indocyanine green techniques are relatively insensitive, in that neither can reliably detect a shunt with a ratio of pulmonary to systemic flow (Qp/Qs) less than 1.3 (percentage shunt, 23%). Although the hydrogen inhalation method is said to be much more sensitive in this(More)
Over the past few years, a metabolic rate meter has been introduced for easy measurement of oxygen consumption. However, its accuracy is unproved. In 40 patients (26 men, 14 women, ages 34 to 73 years), cardiac output was measured simultaneously by thermodilution and the Fick method using the metabolic rate meter to quantitate oxygen consumption. In(More)
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