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Recent News and Articles on the Keywords: atrial fibrillation + atria beat + heart  Related to the article below (Last Update: 5/12/2008)


Vancouver Sun
Heart Danger for Osteoporosis Drug Users
Ivanhoe, FL - Apr 30, 2008
... may be associated with atrial fibrillation, which occurs when the atria -- the smaller upper heart chambers -- start to beat quickly and irregularly. ...
Heartbeat risk for thousands taking osteoporosis drug Daily Mail
Bone drug may cause heart problems Vancouver Sun
Studies shed light on risks of commonly used drugs Scientific American
SeniorJournal.com
all 195 news articles »
New Atrial Fibrillation Surgery Improves Results
Washington Post, United States - Apr 21, 2008
During atrial fibrillation, the upper chambers (atria) of the heart beat rapidly and quiver instead of contracting, drastically reducing the amount of blood ...
Alendronate may be associated with irregular heartbeat
Science Centric, Bulgaria - May 2, 2008
Atrial fibrillation occurs when the atria, the smaller upper chambers of the heart, begin to beat irregularly and rapidly. Susan R. Heckbert, MD, Ph.D., ...
Advance in atrial fibrillation surgery boosts outcomes
Washington University Record, MO - Apr 24, 2008
During atrial fibrillation, the upper chambers (atria) of the heart beat rapidly and quiver instead of contracting, drastically reducing the amount of blood ...
Source: Google News

… mapping and description of the electrophysiologic basis of atrial flutter and atrial fibrillation -
JL Cox - The Journal of Thoracic and Cardiovascular Surgery, 1991 - AATS/WTSA
... Curves in the Cardioplegia-Arrested and Beating Heart Ann. ... characteristics of paroxysmal
and chronic atrial fibrillation in human right atrium J. Am. ...

Predictors of Atrial Fibrillation After Conventional and Beating Heart Coronary Surgery A … -
R Ascione, M Caputo, G Calori, CT Lloyd, MJ … - Circulation, 2000 - Am Heart Assoc
... Atrial fibrillation (AF) is a frequent complication of CABG. ... cardioplegic protection
of the atria have been ... revascularization on the beating heart does not ...

Initiation of Atrial Fibrillation by Ectopic Beats Originating From the Pulmonary Veins … -
SA Chen, MH Hsieh, CT Tai, CF Tsai, VS Prakash, WC … - Circulation, 1999 - Am Heart Assoc
... Drainage to the Left Atrium: Implications for ... A new device for beating heart bipolar
radiofrequency ... Ablation of Atrial Fibrillation: Functional Characterization ...

Promotion of Atrial Fibrillation by Heart Failure in Dogs Atrial Remodeling of a Different Sort -
D Li, S Fareh, TK Leung, S Nattel - Circulation, 1999 - Am Heart Assoc
... due to another mechanism or by a premature beat in the ... mitral regurgitation decreases
spatiotemporal organization of atrial fibrillation in left atrium Am J ...

… of Atrial Dilatation on Refractory Period and Vulnerability to Atrial Fibrillation in the Isolated … -
F Ravelli, M Allessie - Circulation, 1997 - Am Heart Assoc
... Ventricular beats induce variations in cycle length of rapid ... Dynamic
electrophysiological behavior of human atria during paroxysmal atrial fibrillation. ...

Initiation of Atrial Fibrillation by Ectopic Beats Originating From the Superior Vena Cava … -
CF Tsai, CT Tai, MH Hsieh, WS Lin, WC Yu, KC Ueng, … - Circulation, 2000 - Am Heart Assoc
... atrial fibrillation by ectopic beats originating from ... catheter ablation of focal
atrial fibrillation originating from ... junction between the left atrium and the ...

Characterization of Atrial Fibrillation in Man: Studies Following Open Heart Surgery* -
JL WELLS, RB KARP, NT KOUCHOUKOS, WAH MACLEAN, TN … - Pacing and Clinical Electrophysiology, 1978 - Blackwell Synergy
... were related to duration of atrial fibrillation and presence ... In six patients, atrial
electrograms from the superior and inferior right atrium were recorded ...

Circus Movement in Rabbit Atrial Muscle as a Mechanism of Tachycardia -
MA ALLESSIE, FIM BONKE, FJG SCHOPMAN - Circulation Research, 1973 - Am Heart Assoc
... The isolated left atrium of the rabbit ... surface electrogram ? atrial premature beats ?
unidirectional block ... as the mechanism in atrial fibrillation J. Thorac ...

… Functional, and Electrophysiological Characteristics of a New Model of Sustained Atrial Fibrillation -
CA Morillo, GJ Klein, DL Jones, CM Guiraudon - Circulation, 1995 - Am Heart Assoc
... pacemaker was set at 70 beats per minute ... distribution of the epicardial electrodes
on both atria. Shortest atrial fibrillation cycle length is localized to the ...

Atrial Fibrillation Begets Atrial Fibrillation A Study in Awake Chronically Instrumented Goats -
MCEF Wijffels, CJHJ Kirchhof, R Dorland, MA … - Circulation, 1995 - Am Heart Assoc
... and a single early premature beat now induced ... postulating that the persistence of
atrial fibrillation depends on ... number of wavelets being present in the atria. ...

Source: Google Scholar

People with atrial fibrillation (AF) have irregular heart beats and have a tendency to form blood clots in the upper chambers (atria) of their hearts. These clots can then travel to the brain, block vessels and cause a stroke. One way of reducing the risk of this occurring is to give drugs that limit the blood's ability to create clots. Two commonly used options are anticoagulants that inhibit the clotting process (e.g. warfarin), and drugs such as aspirin that make blood platelets less likely to bind together and trigger a clot.
In standard medical practice, anticoagulants are often given to people with AF who are at high risk of strokes, while anti-platelet treatments are offered to people at lower risk.

A team of Cochrane Researchers set out to compare the relative benefits of these two treatments. After searching the medical literature, they drew on data found in eight trials that together involved a total of 9598 people who had AF but had not suffered stokes so far.

The results showed that anticoagulants were more successful than anti-platelet therapies at reducing stroke. They reduced the risk of a stroke in people with AF by about 33% compared with anti-platelet therapies. The anti-platelet therapies did, however, still have an effect, reducing the risk by 20% when compared to people who were given no treatment (controls).

"Adjusted-dose warfarin offers larger, more predictable reductions in stroke for AF patients who can receive it," says lead researcher Maria Aguilar, who works in the department of Neurology at the Mayo Clinic Scottsdale, Arizona, USA.

While it is clear that both drugs can bring benefit, it is unclear at what point a person should start to take them.

"The threshold of benefit that would warrant anticoagulation remains controversial and depends on patient preferences and availability of optimal anticoagulation monitoring," says Aguilar.

Jadad AR, Cook DJ, Jones A, Klassen TP, Tugwell P, Moher M, et al. Methodology and reports of systematic Reviews and meta-analysies: a comparison of Cochrane Reviews with articles published in paper-based journal.

Source: Jennifer Beal
John Wiley & Sons, Inc.
 
 
 
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