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BACKGROUND We tested the hypothesis that prophylactic cardiac-resynchronization therapy in the form of biventricular stimulation with a pacemaker with or without a defibrillator would reduce the risk of death and hospitalization among patients with advanced chronic heart failure and intraventricular conduction delays. METHODS A total of 1520 patients who(More)
BACKGROUND The mortality rate among patients with coronary artery disease, abnormal ventricular function, and unsustained ventricular tachycardia is high. The usefulness of electrophysiologic testing for risk stratification in these patients is unclear. METHODS We performed electrophysiologic testing in patients who had coronary artery disease, a left(More)
BACKGROUND The factors that determine the risk for sudden death or implantable cardioverter defibrillator therapy in patients receiving cardiac resynchronization therapy (CRT) therapies are largely unknown. METHODS AND RESULTS We hypothesized that clinical measures of heart failure severity and the presence of comorbid conditions would predict the risk of(More)
A large multicentre study on the short and long term clinical and developmental outcome of infants randomised to different diets is being undertaken. This report represents an interim analysis of the early postnatal growth performance of an unselected population of 194 preterm infants (gestation, mean (SD) 31 . 0 (2 . 9) weeks; birthweight, mean (SD) 1364(More)
OBJECTIVE To characterize the feasibility and safety of a wireless networked system incorporating physiologic assessments and direct confirmation of digital tablet ingestions in ambulatory patients with schizophrenia or bipolar disorder. METHOD In this 4-week observational study conducted between May 2010 and May 2011 at 2 US academic clinical study(More)
OBJECTIVE ANTHEM-HF evaluated a novel autonomic regulation therapy (ART) via either left or right vagus nerve stimulation (VNS) in patients with heart failure (HF) and reduced ejection fraction (HFrEF). METHODS AND RESULTS Sixty subjects (New York Heart Association [NYHA] functional class II-III, left ventricular ejection fraction (LVEF) ≤ 40%, left(More)
BACKGROUND Aldosterone blockade is recommended for patients with congestive heart failure after acute myocardial infarction complicated by left ventricular systolic dysfunction; however, the perceived risk of hyperkalemia may limit implementation of this therapeutic approach. This subanalysis examined the relationship between eplerenone, serum potassium(More)
Magnesium has been used empirically for several decades in the treatment of atrial and ventricular arrhythmias in patients with normal and decreased serum magnesium levels. However, a systematic evaluation of the effects of magnesium on cardiac conduction and refractoriness in humans has not been described. In this study, the electrocardiographic and(More)
Ten consecutive patients with recurrent episodes of symptomatic, idiopathic, sustained monomorphic ventricular tachycardia (VT) originating in the right ventricle underwent an attempt at catheter ablation of the ventricular tachycardia. There were seven women and three men, with a mean age of 39 +/- 14 years (+/- SD). None of the patients had any evidence(More)
The prevention of pacemaker-mediated tachycardias requires a safe, reliable method for distinguishing retrograde from anterograde atrial activation by dual chamber pacemakers. In this study, a technique was developed to detect the morphological change that occurs in the waveform of the intra-atrial electrogram during retrograde atrial activation. The method(More)