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Renin-angiotensin-aldosterone System (RAAS), Inflammation, and Post-Operative Atrial Fibrillation (AF)

Atrial Fibrillation Clinical Trial

Official title:
RAAS, Inflammation, and Post-operative AF

Clinical Trial Summary

Atrial fibrillation (AF) is the most prevalent, sustained type of irregular heartbeat and affects over 2 million Americans. Post-operative AF, which leads to significant morbidity and a prolonged hospital stay, complicates 20% to 40% of cardiopulmonary bypass (CPB) surgical procedures. While recent studies indicate that interruption of the renin-angiotensin-aldosterone system by either angiotensin-converting enzyme (ACE) inhibition or AT1 receptor antagonism decreases the incidence of AF following a heart attack or cardioversion (electric shock to the heart), its effect on the incidence of post-operative AF has not been throughly studied. Studies in both animals and humans suggest that inflammation-induced atrial remodeling plays an important role in the cause of AF. Recent studies also provide evidence that activation of the renin-angiotensin-aldosterone system induces inflammation, myocyte injury, proarrhythmic electrical remodeling, and fibrosis through aldosterone.

Clinical Trial Description

AF is the most prevalent, sustained type of irregular heartbeat and affects over 2 million Americans. Post-operative atrial fibrillation(AF), which leads to significant morbidity and a prolonged hospital stay, complicates 20% to 40% of CPB surgical procedures. While recent studies indicate that interruption of the renin-angiotensin-aldosterone system by either angiotensin-converting enzyme(ACE) inhibition or angiotensin II subtype 1 (AT1) receptor antagonism decreases the incidence of AF following a heart attack or cardioversion (electric shock to the heart), its effect on the incidence of post-operative AF has not been throughly studied. Studies in both animals and humans suggest that inflammation-induced atrial remodeling plays an important role in the cause of AF. Recent studies also provide evidence that activation of the renin-angiotensin-aldosterone system induces inflammation, myocyte injury, proarrhythmic electrical remodeling, and fibrosis through aldosterone.

This study will evaluate the effectiveness of ACE inhibition and aldosterone receptor antagonism at decreasing inflammation and AF following cardiopulmonary bypass (CPB) surgery. ;

Study Design

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

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00141778
Study type Interventional
Source Vanderbilt University
Contact
Status Completed
Phase Phase 2/Phase 3
Start date April 2005
Completion date August 2010
View Details
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