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A Phase 3b Study of Vernakalant Injection in Patients With Recent Onset Symptomatic Atrial Fibrillation (AF)(MK-6621-045)

2014-08-27 03:18:53 | BioPortfolio

Summary

The purpose of this study is to evaluate the safety and efficacy of vernakalant injection in subjects with recent onset (AF > 3 hours to <= 7 days), symptomatic atrial fibrillation and no evidence or history of congestive heart failure.

Description

Participants received a 10-minute intravenous (IV) infusion of vernakalant (3 mg/kg) or an equivalent amount of normal saline (placebo), followed by a 15-minute observation period. If the participant was still in atrial fibrillation or atrial flutter, a second 10-minute IV infusion of vernakalant (2 mg/kg) or an equivalent amount of placebo was administered unless the participant experienced any dose-stopping criteria after the start of the first infusion. If a participant converted to sinus rhythm during the first or second infusion, that infusion was completed.

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Conditions

Atrial Fibrillation

Intervention

Vernakalant, Placebo

Status

Terminated

Source

Cardiome Pharma

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:18:53-0400

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Medical and Biotech [MESH] Definitions

Rapid, irregular atrial contractions caused by a block of electrical impulse conduction in the right atrium and a reentrant wave front traveling up the inter-atrial septum and down the right atrial free wall or vice versa. Unlike ATRIAL FIBRILLATION which is caused by abnormal impulse generation, typical atrial flutter is caused by abnormal impulse conduction. As in atrial fibrillation, patients with atrial flutter cannot effectively pump blood into the lower chambers of the heart (HEART VENTRICLES).

Long-term changes in the electrophysiological parameters and/or anatomical structures of the HEART ATRIA that result from prolonged changes in atrial rate, often associated with ATRIAL FIBRILLATION or long periods of intense EXERCISE.

A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666)

Impaired or delayed impulse conduction between the right and left HEART ATRIA. Advanced interatrial blocks are often associated with arrhythmias (e.g., ATRIAL FLUTTER; and ATRIAL FIBRILLATION), direct conduction block via the Bachmann's bundle and concomitant left atrial enlargement. Syndrome of advanced interatrial block associated with SUPRAVENTRICULAR TACHYCARDIA is referred to as Bayes syndrome.

A THROMBIN inhibitor which acts by binding and blocking thrombogenic activity and the prevention of thrombus formation. It is used to reduce the risk of stroke and systemic EMBOLISM in patients with nonvalvular atrial fibrillation.

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