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Journal ArticleDOI

Cardiac Resynchronization in Chronic Heart Failure

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TLDR
Cardiac resynchronization results in significant clinical improvement in patients who have moderate-to-severe heart failure and an intraventricular conduction delay.
Abstract
Background Previous studies have suggested that cardiac resynchronization achieved through atrial-synchronized biventricular pacing produces clinical benefits in patients with heart failure who have an intraventricular conduction delay. We conducted a double-blind trial to evaluate this therapeutic approach. Methods Four hundred fifty-three patients with moderate-to-severe symptoms of heart failure associated with an ejection fraction of 35 percent or less and a QRS interval of 130 msec or more were randomly assigned to a cardiac-resynchronization group (228 patients) or to a control group (225 patients) for six months, while conventional therapy for heart failure was maintained. The primary end points were the New York Heart Association functional class, quality of life, and the distance walked in six minutes. Results As compared with the control group, patients assigned to cardiac resynchronization experienced an improvement in the distance walked in six minutes (+39 vs. +10 m, P=0.005), functional clas...

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Journal ArticleDOI

The effect of cardiac resynchronization on morbidity and mortality in heart failure

TL;DR: Cardiac resynchronization has been shown to reduce symptoms and improve left ventricular function in patients with heart failure due to systolic dysfunction and cardiac dyssynchrony.
References
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Journal ArticleDOI

Proposal for a new clinical end point to evaluate the efficacy of drugs and devices in the treatment of chronic heart failure.

TL;DR: The new clinical composite score has been prospectively incorporated into the design of studies evaluating the efficacy of endothelin antagonists, cytokine antagonists, vasopressin antagonists, and cardiac resynchronization in the treatment of chronic heart failure.
Journal ArticleDOI

Permanent left ventricular pacing with transvenous leads inserted into the coronary veins.

TL;DR: To conclude, permanent LV pacing via the transvenous route is possible in most patients, with excellent safety and long‐term results.
Journal ArticleDOI

Ventricular contraction abnormalities in dilated cardiomyopathy: effect of biventricular pacing to correct interventricular dyssynchrony.

TL;DR: Improvements in interventricular synchrony during biventricular pacing correlate with acute improvements in LV ejection fraction, and Dilated cardiomyopathy with intraventricular conduction delay is associated with significant intervent cardiac dyssynchrony.
Journal ArticleDOI

Heart failure management using implantable devices for ventricular resynchronization : Comparison of Medical Therapy, Pacing, and Defibrillation in Chronic Heart Failure (COMPANION) trial

TL;DR: The COMPANION study is a randomized, open-label, 3-arm study of patients in New York Heart Association class III or IV with an ejection fraction of 35% or less and a QRS duration of 120 milliseconds or less to determine whether optimal pharmacological therapy used with ventricular resynchronization therapy alone or with cardioverter-defibrillator capability is superior to optimal Pharmacological therapy alone in reducing combined all-cause mortality and hospitalizations.
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