n-3 (omega-3) polyunsaturated fatty acids prevent acute atrial electrophysiological remodeling.

Br J Pharmacol

Department of Veterinary Biosciences, The Ohio State University, Columbus, OH 43210, USA.

Published: February 2007

Background And Purpose: Recent reports suggest that n-3 (omega-3) polyunsaturated fatty acids (PUFAs) may reduce atrial fibrillation (AF). Reduction of the atrial effective refractory period (ERP) is believed to be an important early remodeling event that favors the development and perpetuation of AF. We hypothesized that n-3 PUFAs would attenuate early atrial electrophysiolgical remodeling in a canine model of acute atrial tachypacing.

Experimental Approach: Adult dogs of either sex received n-3 PUFAs (n=6), n-6 PUFAs (n=6), or saline (n=6) infused over 1 h. After a stable ERP was established, treatment was initiated concurrently with 6 h of rapid atrial pacing (400 b.p.m.). Serial right atrial ERPs were measured during rapid atrial pacing, and induction of atrial tachyarrhythmias was attempted at the conclusion of each study.

Key Results: There was no change in P wave duration or in the PQ, QRS, QT or QTc intervals in any of the treatment groups. N-3 PUFA treatment significantly reduced the shortening of atrial ERP, compared to both control groups (P<0.05). In separate experiments, the same n-3 PUFA infusion was given to dogs remaining in normal sinus rhythm. During sinus rhythm, n-3 PUFA infusion did not alter any electrocardiogram (ECG) parameter or the atrial ERP.

Conclusions And Implications: We conclude that acute n-3 PUFA treatment prevents acute atrial electrophysiological remodeling during high rate activity, which may minimize the self-perpetuation of AF.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2013901PMC
http://dx.doi.org/10.1038/sj.bjp.0706977DOI Listing

Publication Analysis

Top Keywords

atrial
10
n-3 omega-3
8
omega-3 polyunsaturated
8
polyunsaturated fatty
8
fatty acids
8
acute atrial
8
n-3 pufas
8
pufas n=6
8
rapid atrial
8
atrial pacing
8

Similar Publications

Untangling areas of improvement in secondary prevention of ischemic stroke in patients with atrial fibrillation.

Sci Rep

December 2024

Health Services Research and Pharmacoepidemiology Unit, Foundation for the Promotion of Health and Biomedical Research of Valencia Region (FISABIO), Avenida Cataluña, 21, 46020, Valencia, Spain.

Improvement of post-stroke outcomes relies on patient adherence and appropriate therapy maintenance by physicians. However, comprehensive evaluation of these factors is often overlooked. This study assesses secondary stroke prevention by differentiating patient adherence to antithrombotic treatments (ATT) from physician-initiated interruptions or switches.

View Article and Find Full Text PDF

Background: Atrial fibrillation (AF) is associated with cognitive decline. Use of oral anticoagulant (OAC) medications offers a lower risk of dementia, but it is unclear whether differences exist between types of OAC agents.

Objective: This was a secondary analysis to explore whether the progression from normal cognition to mild cognitive impairment to dementia differs between adults with AF on warfarin versus non-vitamin K inhibitors medications (NOACs) using data extracted from the National Alzheimer's Coordinating Center clinical case series.

View Article and Find Full Text PDF

We present a case of a 72-year-old female patient with dyspnea and lipothymia. Echocardiography demonstrates an intracavitary cystic mass that fills almost all left atria causing supravalvular obstruction. The magnetic resonance image revealed a 53 × 47 × 48 mm heterogeneous mass with regular edges, tissue characterization suggested myxoma.

View Article and Find Full Text PDF

Background: The new Amplatzer Steerable Delivery Sheath is a delivery system designed to improve ease-of-use and procedural results of left atrial appendage closure (LAAC). We aimed to compare procedural results after switching our LAAC program at a tertiary care center with the Amulet device to the Steerable Delivery Sheath, with a control group of LAAC employing the standard sheath.

Methods: The first n = 32 consecutively treated patients at our site using the Amulet device with the Steerable Delivery Sheath were included in this retrospective analysis.

View Article and Find Full Text PDF

Introduction The study aimed to retrospectively evaluate the early patient outcome and left ventricular function after mitral valve replacement with a tilting disc valve and total preservation. Patients and methods This retrospective observational study includes patients who underwent mitral valve replacement using a tilting disc valve with total preservation of mitral valvular and subvalvular apparatus from July 2021 to August 2022 at a single center. Results The data were reviewed retrospectively for age, sex, comorbidities, operating time, aortic cross-clamp time, cardiopulmonary bypass time, preoperative and postoperative left ventricular ejection fraction, mean gradient across the mitral valve, left ventricular diameter, left atrial size, atrial fibrillation, complications, mortality, and early patient outcome.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!