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.
In a turn up for the books, experts are now saying that contrary to the widely held belief that the omega 3 fats found in oily fish help prevent heart disease, this has not been proven.
Researchers have found a more accurate way to tell which children and teenagers are likely to be among the thousand or so who suddenly die each year in the United States from genetic heart conditions that cause arrhythmia
The fear of public speaking might cause some people to do more than just break out in a cold sweat and battle stomach-churning butterflies - it could prove to have consequences for their heart health.
The development gives researchers insights into how hearts develop in living mouse embryos and could improve our understanding of irregular heartbeats, known as arrhythmias, as well as open doors to observing cellular processes to better understand basic physiology and disease.
For the first time, researchers have linked mutations in a gene that regulates how potassium enters cells to a neurodegenerative disease and to another disorder that causes mental retardation and coordination problems.
To detect "silent" or new cardiac abnormalities, all patients hospitalized for stroke should receive continuous cardiac rhythm monitoring (telemetry) for at least the first 24 hours after the stroke is detected, according to a Loyola University Health System study presented at the American Stroke Association's International Stroke Conference 2006.
Natural herbal supplements are supposed to help boost our immune systems, give us more energy and make us generally healthier.
About five percent of deaths from SIDS (sudden infant death syndrome) in African Americans can be traced to defects in one gene and half of those deaths result from a common genetic variation that increases an infant's risk of developing an abnormal heart rhythm during times of environmental stress
The U.S. Food and Drug Administration (FDA) today approved an innovative combination of technologies that will enhance a doctors' ability to treat patients with abnormal heart rhythms (cardiac arrhythmias).
Engineers who have induced heart cells in culture to mimic the properties of the heart have used the tissue to gain new insight into the mechanisms that spawn irregular heart rhythms.
Last year, about 170,000 people in North America had devices surgically implanted to stop potentially fatal arrhythmias. For many, these were life-saving, but for others they were unnecessary, uncomfortable, and sometimes dangerous.
Researchers from the University of Colorado have shown that mice carrying a genetic mutation that is linked to altered heart growth and function in humans, have significantly worse heart problems if fed a soy diet, when compared to mice fed a soy-free (milk protein-based) diet.
Children are more likely to survive in-hospital cardiac arrests than adults and with appropriate cardiopulmonary resuscitation (CPR), the survival rates for both children and adults are higher than previously thought.
Use of the medication amiodarone is associated with one-half the incidence of atrial tachyarrhythmias (rapid, abnormal heart beat) following cardiac surgery, according to a study in the December 28 issue of JAMA.
Women who have had a heart attack get as much survival benefit as men from implanted cardioverter defibrillators (ICDs), devices designed to monitor the heart's pumping rhythm and shock it back to normal when needed, according to a study published in the December edition of the Journal of Cardiovascular Electrophysiology.
A two-gram fish oil supplement given daily to elderly persons prevented a decline in heart rate variability caused by tiny, dangerous airborne pollutant particles. Heart rate variability, a measure of the autonomic nervous system's regulation of the heart, is an independent risk factor for cardiac arrhythmias, heart attack or sudden death.
A small but compelling pilot study indicates that many children with serious congenital heart disease, who are typically urged to restrict their activity, can improve their cardiovascular function and exercise capacity through a cardiac rehabilitation program.
In guinea pig experiments, Johns Hopkins scientists fused common connective tissue cells taken from lungs with heart muscle cells to create a safe and effective biological pacemaker whose cells can fire on their own and naturally regulate the muscle's rhythmic beat.
The first large-scale study to see whether trained volunteers and lay people can use defibrillators to save the lives of cardiac arrest (CA) victims has concluded that their use by lay people is safe, and if the response time can be shortened to within eight minutes there is the potential to save the lives of 15 out of 100 people who collapse suddenly with CA.
An experience as simple as watching graphically violent or emotional scenes in a movie can induce enough stress to interfere with problem-solving abilities, new research at Ohio State University Medical Center suggests.
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