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March 21, 2002 Vol. 346 No. 12
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Patients who have had a myocardial infarction resulting in a reduced left ventricular ejection fraction are at risk for ventricular arrhythmias and sudden death. In this large trial, patients were randomly assigned to receive an implantable defibrillator or conventional therapy. During the follow-up period, which lasted up to four years, the mortality rate was lower in the defibrillator group than in the conventional-therapy group (14.2 percent vs. 19.8 percent).
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Ventricular fibrillation is the most common cause of cardiac arrest outside the hospital. In cases resistant to defibrillation, lidocaine is often given as adjunctive antiarrhythmic therapy. This randomized, controlled clinical trial compared intravenous lidocaine with intravenous amiodarone, both administered by emergency-response personnel, and found that amiodarone was superior, resulting in increased survival to hospital admission.
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This randomized trial evaluated the efficacy of 200 mg of fluconazole taken orally every day for six weeks as a treatment for cutaneous leishmaniasis. There were follow-up data on 145 patients, and all the parasites isolated were confirmed to be Leishmania major. Three months after treatment ended, there was complete healing of the lesions in 79 percent of those in the fluconazole group, as compared with only 34 percent of those in the placebo group.
Endothelin-1, a potent vasoconstrictor and smooth-muscle mitogen, may have a role in the pathogenesis of pulmonary hypertension. The therapeutic efficacy of bosentan, an endothelin-receptor antagonist, was evaluated in this randomized clinical trial. Bosentan at a dose of 125 mg twice daily improved exercise capacity and functional class.
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A total of 1388 hospitalized older patients were randomly assigned to receive care in an inpatient geriatric unit or a conventional inpatient unit and at an outpatient geriatric clinic or a conventional outpatient clinic. Neither geriatric intervention had an effect on mortality at one year, which was 21 percent overall. Care in the special inpatient unit was associated with improvements at the time of discharge in several measures of functioning and quality of life.
Salt sensitivity is present in about half of people with essential hypertension; decreasing salt intake ameliorates the hypertension. This review provides an explanation of how initially subtle renal injury promotes a tendency toward hypertension. The kidneys, initially normal in many persons with early primary hypertension, sustain subclinical injury over time, resulting in arteriolosclerosis and tubulointerstitial disease that lead to established hypertension.
The tobacco business is a global enterprise that has caused a worldwide public health crisis — by the year 2020 an estimated 8.4 million people will succumb annually to tobacco-related diseases. This week's Sounding Board article discusses the ongoing response of the World Health Assembly of the World Health Organization to this crisis — to draft and adopt an international treaty called the Framework Convention on Tobacco Control, which aims to establish worldwide standards for tobacco control.
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