Richard J. Sweeney

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Conventional wisdom is that industrial-country floating exchange rates contain unit roots. SUR tests on panels of Group-of-Ten log nominal rates reject the null of unit roots for various samples over the current float, with significance levels from 0.5% to 15%. In out-of-sample forecasts, meanreversion models beat random walks on average, in some forecast(More)
Failure to risk-adjust estimates of profits, from central-bank foreign exchange intervention or from private speculation, can have large effects on the estimated profits, including changing signs. Many choices arise in deciding how to adjust profits for risk. The time period over which a market model is fit has mixed effects on calendar-year profits;(More)
BACKGROUND Measurements of refractory period extension by shocks during ventricular pacing at fast rates predict that all tissue should be refractory for a brief interval after shocks during fibrillation. This study experimentally determined whether a refractory interval was present just after a shock during fibrillation. METHODS AND RESULTS In(More)
BACKGROUND To better understand the refractory period extension (RPE) produced by transcardiac shocks and its possible role in defibrillation, we measured RPE under various experimental conditions. METHODS AND RESULTS Using ventricular pacing in pentobarbital-anesthetized dogs, we characterized RPE in relation to the anatomic site of pacing, the local(More)
In pentobarbital-anesthetized dogs, transcardiac shocks of up to 30 J or pacing stimuli were delivered to myocardial tissue at different times in the electrical cycle. When delivered midway or later into electrical systole, shocks, but not pacing stimuli, greatly extended the refractory period as determined by left ventricular pacing. There was a positive(More)
In 18 open-chested mongrel dogs (18.0 +/- 1.7 kg) we compared three anesthetics and three methods for measuring the defibrillation threshold. Six animals were anesthetized with pentobarbital (30 mg/kg) and maintained with a pentobarbital infusion (4 mg/kg per hour). All other animals were anesthetized with sodium brevital (10 mg/kg) and maintained with(More)
Refractory period extension (RPE) has been proposed as a basic mechanism for defibrillation but it remains unclear if RPE exists at the fast rates associated with ventricular fibrillation. In 7 pentobarbital anesthetized dogs, we measured refractory periods with and without 8 ms rectangular transcardiac shocks at left ventricular pacing rates of 200-600(More)
INTRODUCTION Standard precautions are disease transmission prevention strategies recommended by both the World Health Organization (WHO) and by the Centers for Disease Control and Prevention (CDC). Emergency medical services (EMS) personnel are expected to utilize standard precautions. METHODS This was a prospective observational study of the use of(More)