Publications by authors named "Nancy Clapp-Channing"

Background: Few studies have assessed treatment effects on health-related quality of life (HRQoL) in patients with acute coronary syndrome (ACS) treated without revascularization. The TRILOGY ACS trial randomized patients with ACS to either prasugrel or clopidogrel therapy plus aspirin. Outcomes showed a complex pattern suggestive of late benefits with respect to repeat clinical events and benefits confined to patients who underwent angiography.

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Background: The National Institutes of Health.funded Trial to Assess Chelation Therapy (TACT) randomized 1708 stablecoronary disease patients aged .50 years who were .

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Importance: Randomized clinical trials have shown that implantable cardioverter-defibrillator (ICD) therapy saves lives. Whether the survival of patients who received an ICD in primary prevention clinical trials differs from that of trial-eligible patients receiving a primary prevention ICD in clinical practice is unknown.

Objective: To determine whether trial-eligible patients who received a primary prevention ICD as documented in a large national registry have a survival rate that differs from the survival rate of similar patients who received an ICD in the 2 largest primary prevention clinical trials, MADIT-II (n = 742) and SCD-HeFT (n = 829).

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Background: Expectations of patients regarding their prospects for recovery have been shown to predict subsequent physical and social functioning. Evidence regarding the impact of expectations on clinical outcomes is limited.

Methods: At the inpatient service of a tertiary care hospital, we evaluated beliefs of patients undergoing coronary angiography about their prognosis as predictors of long-term survival and 1-year functional status.

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Background: Public access automatic external defibrillators (AEDs) can save lives, but most deaths from out-of-hospital sudden cardiac arrest occur at home. The Home Automatic External Defibrillator Trial (HAT) found no survival advantage for adding a home AED to cardiopulmonary resuscitation (CPR) training for 7,001 patients with a prior anterior wall myocardial infarction. Quality of life (QOL) outcomes for both the patient and spouse/companion were secondary end points.

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Introduction: Remote monitoring is increasingly becoming the new standard of care for implantable cardioverter defibrillator (ICD) follow-up. We sought to determine whether remote monitoring of ICDs improves patient outcomes compared with quarterly device interrogations in clinic.

Methods And Results: In this single-center pilot clinical trial, adult patients with an ICD were randomly assigned to remote monitoring versus quarterly device interrogations in clinic.

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Background: Approximately one third of the 780,000 people in the United States who have a stroke each year have recurrent events. Although efficacious secondary prevention measures are available, levels of adherence to these strategies in patients who have had stroke are largely unknown. Understanding medication-taking behavior in this population is an important step to optimizing the appropriate use of proven secondary preventive therapies and reducing the risk of recurrent stroke.

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Background: The open-artery hypothesis postulates that late opening of an infarct-related artery after myocardial infarction will improve clinical outcomes. We evaluated the quality-of-life and economic outcomes associated with the use of this strategy.

Methods: We compared percutaneous coronary intervention (PCI) plus stenting with medical therapy alone in high-risk patients in stable condition who had a totally occluded infarct-related artery 3 to 28 days after myocardial infarction.

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Background: Implantable cardioverter-defibrillator (ICD) therapy significantly prolongs life in patients at increased risk for sudden death from depressed left ventricular function. However, whether this increased longevity is accompanied by deterioration in the quality of life is unclear.

Methods: In a randomized trial, we compared ICD therapy or amiodarone with state-of-the-art medical therapy alone in 2521 patients who had stable heart failure with depressed left ventricular function.

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Background: The most common location of out-of-hospital sudden cardiac arrest is the home, a situation in which emergency medical services are challenged to provide timely care. Consequently, home use of an automated external defibrillator (AED) might offer an opportunity to improve survival for patients at risk.

Methods: We randomly assigned 7001 patients with previous anterior-wall myocardial infarction who were not candidates for an implantable cardioverter-defibrillator to receive one of two responses to sudden cardiac arrest occurring at home: either the control response (calling emergency medical services and performing cardiopulmonary resuscitation [CPR]) or the use of an AED, followed by calling emergency medical services and performing CPR.

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Most cardiac arrests occur in the home, where emergency medical services (EMS) systems are challenged to provide timely care. Because a large proportion of sudden cardiac arrests (SCAs) are due to ventricular tachycardia or ventricular fibrillation, home use of an automated external defibrillator (AED) might offer an opportunity to decrease mortality in those at risk. Predicting who will have a cardiac arrest in the general population is difficult.

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Background: Ninety-nine percent of pacemakers implanted in the United States include an option for rate modulation.

Objective: The purpose of this study was to determine whether dual-chamber rate-modulated pacing, when compared with dual-chamber pacing alone, improved quality of life.

Methods: This was a single-blind randomized controlled trial comparing dual-chamber with rate-modulated dual-chamber pacing.

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Background: In the Sudden Cardiac Death in Heart Failure Trial (SCD-HeFT), implantable cardioverter-defibrillator (ICD) therapy significantly reduced all-cause mortality rates compared with medical therapy alone in patients with stable, moderately symptomatic heart failure, whereas amiodarone had no benefit on mortality rates. We examined long-term economic implications of these results.

Methods And Results: Medical costs were estimated by using hospital billing data and the Medicare Fee Schedule.

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Objective: Numerous studies have shown network assessments of social contact predict mortality in patients with coronary artery disease (CAD). Fewer studies have demonstrated an association between perceived social support and longevity in patient samples. It has been suggested that 1 of the mechanisms linking social support with elevated risk for mortality is the association between social support and other risk factors associated with decreased longevity such as smoking, failure to exercise, and depressive symptoms.

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Background: Sudden death from cardiac causes remains a leading cause of death among patients with congestive heart failure (CHF). Treatment with amiodarone or an implantable cardioverter-defibrillator (ICD) has been proposed to improve the prognosis in such patients.

Methods: We randomly assigned 2521 patients with New York Heart Association (NYHA) class II or III CHF and a left ventricular ejection fraction (LVEF) of 35 percent or less to conventional therapy for CHF plus placebo (847 patients), conventional therapy plus amiodarone (845 patients), or conventional therapy plus a conservatively programmed, shock-only, single-lead ICD (829 patients).

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Background: Comparing American and Canadian practice patterns and outcomes offers a natural experiment to examine the relative benefits of aggressive versus conservative management of coronary artery disease. In a prospective substudy of the Global Use of Strategies to Open Occluded Coronary Arteries IIb (GUSTO-IIb) trial, differences in the management of non-ST elevation acute coronary syndrome, and the associated impact on quality of life (QOL) outcomes, were examined in the two countries.

Methods And Results: The patient population, selected randomly from the parent trial population, comprised 390 Canadian and 1122 American patients for whom both baseline and one-year data were available.

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Background: Psychological stress is known to have a negative effect on the health and well-being of coronary artery disease (CAD) patients. Although the study of stress CAD samples has received considerable attention, few studies have examined the effects of gender and age, had multiple follow-ups over an extended period, and had extensive baseline assessment batteries.

Purpose: In this study, demographic, clinical, social, and personality variables were evaluated as predictors of nine repeated assessments of stress over a 2-year period in 322 CAD patients (33.

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Purpose: This study aimed to examine demographic, psychosocial, and clinical variables as predictors of smoking cessation in patients with coronary artery disease.

Methods: Smoking status and psychosocial variables were obtained at baseline. Participants were followed up at 3 months then annually up to 6 years for smoking status.

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