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.
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.
According to a Florida autopsy report a 4-year-old boy who collapsed in June after riding a rocket simulator at Walt Disney World had a serious heart defect which caused his death.
Duke University engineers are developing technology that may enable physicians to someday use high frequency ultrasound waves both to visualize the heart's interior in three dimensions and then selectively destroy heart tissue with heat to correct arrhythmias.
Using magnetic resonance imaging (MRI) scans of the heart wall, researchers at Johns Hopkins have found that people whose muscle wall thickness contained more than 25 percent scar tissue were approximately nine times more likely to test positive for a fast and dangerous heart rhythm known as ventricular arrhythmia.
A new study suggests that changes in gastric physiology perform better than standard polygraph methods in distinguishing between lying and telling the truth.
According to a new study it is suggested that it is the stomach rather than the heart that offers greater lie detection accuracy.
As the implantation of cardioverter-defibrillator devices to prevent sudden cardiac death becomes increasingly popular, patients are likely to get the best results when they are treated by physicians who perform the procedures frequently, according to a new study in the Oct. 18, 2005, issue of the Journal of the American College of Cardiology.
The American College of Cardiology Foundation (ACCF), the American Heart Association (AHA), and the American Academy of Pediatrics (AAP) have joined forces to develop important first-ever recommendations for fellowship training in pediatric cardiology.
A large-scale study led by researchers at Beth Israel Deaconess Medical Center (BIDMC) has found that heavy alcohol consumption - 35 or more drinks per week -- can significantly increase men's risk of developing atrial fibrillation, a dangerous type of arrhythmia and one of the leading risk factors for stroke.
Their findings that a chemical imbalance might underlie such damage could also lead to the development of anti-inflammatory drugs without the adverse side effects, the researchers said.
Women with atrial fibrillation who are not on anticoagulant therapy have a higher rate of ischemic stroke and face a higher absolute risk for stroke than do men with the condition, according to a joint study
In patients with an increased risk of heart rhythm problems, cardiac arrest or arrhythmia, eating fish oil did little to reduce that risk.
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