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.
Using powerful X-rays, University of British Columbia researchers have reconstructed a crime scene too small for any microscope to observe - and caught the culprit of arrhythmia in action.
Meta-analysis findings question whether beta-blocker treatment remains effective in patients who have heart failure with reduced left ventricular ejection fraction if they also have atrial fibrillation.
Steroid therapy is associated with a considerable reduction in all-cause mortality and new-onset and progressive cardiomyopathy in patients with the debilitating X-linked disease Duchenne muscular dystrophy.
A team led by Vanderbilt University investigators has discovered two new genes - both coding for the signaling protein calmodulin - associated with severe early-onset disorders of heart rhythm.
Electocardiographic mapping may offer a noninvasive and accurate alternative to a standard electrophysiologic study, say researchers.
People who develop atrial fibrillation are at more than twice the usual risk for sudden cardiac death, reveal US study findings published in JAMA Internal Medicine.
Healthy men and women show little difference in their hearts, except for small electrocardiographic disparities. But new genetic differences found by Washington University in St. Louis researchers in hearts with disease could ultimately lead to personalized treatment of various heart ailments.
Older adults living in institutions are at a greater risk for accidentally falling over if they have more than one disease, researchers report.
nContact, Inc. today announced that the U.S. Food and Drug Administration (FDA) has cleared the Company's modifications to its VisiTrax cardiac ablation device, EPi-Sense, now with embedded sensing capability.
The first patient has been treated in the Boston Scientific Corporation ZERO AF clinical trial to evaluate the safety and effectiveness of the Blazer Open-Irrigated Temperature Ablation Catheter in patients with symptomatic, drug refractory paroxysmal atrial fibrillation.
Researchers have found new evidence that metabolic stress can increase the onset of atrial arrhythmias, such as atrial fibrillation (AF), a common heart condition that causes an irregular and often abnormally fast heart rate.
Laryngopharyngeal surgeries that are performed in an ambulatory setting demonstrate low complication and admission rates, suggesting that such procedures can be carried out safely on an outpatient basis, show findings from a US study.
When a young athlete dies unexpectedly on the basketball court or the football field, it's both shocking and tragic. Now Stanford University School of Medicine researchers have, for the first time, identified the molecular basis for a condition called hypertrophic cardiomyopathy that is the most common cause for this type of sudden cardiac death.
My mortality wake-up call came in a hospital after knee surgery, when I flat-lined because of a heart arrhythmia and was resuscitated by a nurse. In response to columns about those events, stories have streamed in from people who are running out of time themselves, or enduring the pain of watching loved ones fade. The deaths they face are as different as the lives they've lived, but a steady refrain runs through their emails and letters.
A large body of research has focused on the ability of oxytocin to facilitate social bonding in both marital and parenting relationships in human females. A new laboratory study, led by Dr. Ruth Feldman from Bar-Ilan University in Israel and published in the current issue of Biological Psychiatry, has found that oxytocin administration to fathers increases their parental engagement, with parallel effects observed in their infants.
Bisphenol A, a substance found in many synthetic products, is considered to be harmful, particularly, for fetuses and babies. Researchers from the University of Bonn have now shown in experiments on cells from human and mouse tissue that this environmental chemical blocks calcium channels in cell membranes. Similar effects are elicited by drugs used to treat high blood pressure and cardiac arrhythmia. The results are now presented in the journal "Molecular Pharmacology."
AliveCor, Inc. announced today at the start of the 4th annual mHealth Summit in Washington, D.C. that the company received FDA 510(k) clearance on its mobile Heart Monitor as well as CE Mark conformity. This clinical-quality, low-cost mobile ECG heart monitor, compatible with the iPhone® 4 and 4S, enables doctors to evaluate patient heart health easily, quickly and remotely.
Literally hundreds of clinical trials, including some that have gained widespread attention, have been done on the possible benefits of omega-3 fatty acids for the prevention of heart disease - producing conflicting results, varied claims, and frustrated consumers unsure what to believe.
Experts are calling into question the widespread use of digoxin for atrial fibrillation, in the wake of findings linking the drug to increased mortality.
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