Arrhythmia News and Research

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An arrhythmia is a problem with the speed or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. A heartbeat that is too fast is called tachycardia. A heartbeat that is too slow is called bradycardia. Most arrhythmias are harmless, but some can be serious or even life threatening. When the heart rate is too slow, too fast, or irregular, the heart may not be able to pump enough blood to the body. Lack of blood flow can damage the brain, heart, and other organs.

New study finds endurance athletes with ventricular arrhythmias have dysfunctional right ventricles

Some high-level athletes who take part in endurance sports can develop a rare but life-threatening condition called ventricular arrhythmia (VA) in which the heart beats at an abnormal rate and rhythm.

22 Jan 2007

Boston Scientific publishes results of Dual-Chamber Pacing study

Boston Scientific Corporation has announced that results of the largest implantable cardioverter defibrillator (ICD) study to date, known as INTRINSIC RV, were published in the January issue of the journal Circulation.

2 Jan 2007

Safety of t-PA clot-busting therapy questioned

Across the world, emergency medical teams often administer a powerful clot-busting drug called tissue plasminogen activator (t-PA) to help patients stricken by heart attack.

13 Nov 2006

Underlying causes, frequencies, and outcomes of dilated cardiomyopathy

The mystery behind a commonly untreatable and undetected heart muscle disease in children is partially revealed for the first time in today's edition of the scientific journal JAMA.

17 Oct 2006

Researchers patent novel method for measuring blood pressure in the heart

Researchers at Virginia Commonwealth University Medical Center have developed and patented a new, noninvasive means of measuring blood pressure inside the heart.

21 Sep 2006

Latest studies reveal more risks with Vioxx

Two major studies by experts in the U.S. and Australia have provided new evidence of the cardiovascular and kidney risks attached to both COX-2 inhibitors and NSAID painkillers.

18 Sep 2006

Elderly atrial fibrillation patients lack adequate application of current management guidelines

World Congress of Cardiology Report - Although elderly AF patients are at much higher risk for stroke, they are undertreated for stroke prophylaxis compared to younger patients.

5 Sep 2006

Useful insights into mechanisms of catecholaminergic polymorphic ventricular tachycardia

World Congress of Cardiology Report - Familial genetic defects are responsible for several cases of unexpected sudden cardiac death in young and otherwise healthy individuals.

5 Sep 2006

Automated external defibrillators, reliability and clinical benefits

The FDA frequently issues safety advisories for automated external defibrillators and accessories, although the number of actual device malfunctions appears to be relatively small.

8 Aug 2006

New way of delivering corrective genes holds promise for hereditary diseases of the heart

A new way of delivering corrective genes with a single injection into a vein holds promise for long-lasting treatments of hereditary diseases of the heart, University of Florida researchers report.

6 Aug 2006

Older patients with atrial fibrillation have higher rates of major hemorrhage in the brain

Older patients with atrial fibrillation have higher rates of major hemorrhage in the brain whether or not they are using a common blood thinning therapy, according to a new study.

3 Aug 2006

Likelihood of hemorrhage on warfarin is relatively small

Older patients with atrial fibrillation have higher rates of major hemorrhage in the brain whether or not they are using a common blood thinning therapy, according to a new study.

2 Aug 2006

Comprehensive care for complex, high-risk pregnancies

As many as 3 percent of all pregnancies result in the birth of a baby with chromosomal anomalies like Down syndrome or structural anomalies such as congenital heart disease.

23 May 2006

Corticosteroids may be linked to an increased risk for atrial fibrillation

High doses of medications known as corticosteroids may be linked to an increased risk for atrial fibrillation, a heart rhythm disorder characterized by an irregular heartbeat, according to an article in the May 8 issue of Archives of Internal Medicine.

9 May 2006

Study helps explain why aerobic training helps heart failure patients

Aerobic training is associated with a reversal of abnormal hormonal patterns that underlie many of the debilitating symptoms of heart failure, according to a new study in the Journal of the American College of Cardiology.

3 May 2006

New method allows heart beat triggers to be viewed and better understood

Researchers have developed unique chemical dyes that have made it possible to see what the naked eye has never seen before: action potentials, or voltage changes, of cardiac cells - including those deep inside the heart, which trigger and determine the pace of heartbeats.

25 Apr 2006

Study is the first to show that stature influences atrial fibrillation risk

Analysis of data from a registry of patients with left ventricular dysfunction indicates that height is an independent risk factor for an arrhythmia of the upper chambers of the heart, according to a new study in the April 18, 2006, issue of the Journal of the American College of Cardiology.

17 Apr 2006

Statins may be able to play a role in preventing or slowing heart valve disease

Research to be published in the April 18 issue of the Journal of the American College of Cardiology provides the first explanation of an active rather than passive process that leads to heart valve degeneration, furthering a Northwestern researcher's effort to lead a paradigm shift in the medical community's beliefs about the cause of valve disease.

11 Apr 2006

Shape and function of the heart improves with apnea treatment

Patients with obstructive sleep apnea have enlarged and thickened hearts that pump less effectively, but the heart abnormalities improve with use of a device that helps patients breathe better during sleep, according to a new study in the April 4, 2006, issue of the Journal of the American College of Cardiology.

4 Apr 2006

Enzyme released by cardiac mast cells during heart attack contributes to arrhythmia

In times of cardiac crisis, mast cells in the heart secrete a powerful enzyme, renin, that indirectly triggers dangerous arrhythmias, according to a team of researchers at the Weill Medical College of Cornell University in New York City.

4 Apr 2006