Cardiac arrhythmia
hideCardiac arrhythmia (also dysrhythmia) is a term for any of a large and heterogeneous group of conditions in which there is abnormal electrical activity in the heart. The heart beat may be too fast or too slow, and may be regular or irregular.
Some arrhythmias are life-threatening medical emergencies that can result in cardiac arrest and sudden death. Others cause symptoms such as an abnormal awareness of heart beat (palpitations), and may be merely annoying. Still others may not be associated with any symptoms at all, but predispose toward potentially life-threatening stroke or embolus.
Some arrhythmias are very minor and can be regarded as normal variants. In fact, most people will sometimes feel their heart skip a beat, or give an occasional extra strong beat neither of these is usually a cause for alarm.
The term sinus arrhythmia refers to a normal phenomenon of mild acceleration and slowing of the heart rate that occurs with breathing in and out. It is usually quite pronounced in children, and steadily decreases with age. This can also be present during meditation breathing exercises that involve deep inhaling and breath holding patterns.
For more information about Cardiac arrhythmia, read the full article at
Wikipedia.
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News tagged with arrhythmia
Scientists find 'molecular trigger' for sudden death in epilepsy
Oct 14, 2009 |
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The most common gene for a syndrome associated with abnormal heart rhythms and sudden death triggers epileptic seizures and could explain sudden unexplained death in epilepsy, said researchers from Baylor College of Medicine ...
New genetic link between cardiac arrhythmias and thyroid dysfunction identified
Sep 20, 2009 |
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Genes previously known to be essential to the coordinated, rhythmic electrical activity of cardiac muscle -- a healthy heartbeat -- have now also been found to play a key role in thyroid hormone (TH) biosynthesis, according ...
Mount Sinai first in nation to ablate atrial fibrillation using new visually-guided balloon catheter
Sep 18, 2009 |
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Physicians at The Mount Sinai Medical Center in New York became the first in the U.S. to ablate atrial fibrillation using a visually-guided laser balloon catheter. The procedure was performed September 15 by Vivek Y. Reddy, ...
Implantable defibrillators may not benefit women with heart failure
Sep 14, 2009 |
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Implantable cardioverter-defibrillators do not appear to be associated with a reduced risk of death in women with advanced heart failure, according to a meta-analysis of previously published research in the September 14 issue ...
Sudden death during sport: Education to improve survival rates
Sep 01, 2009 |
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More widespread availability of defibrillators and education of the general public could boost survival rates fourfold amongst athletes suffering cardiac arrest, a study has found. In less than half of cases, a bystander ...
New technique prevents major cause for heart-related stroke
Aug 21, 2009 |
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Physicians at The Mount Sinai Medical Center were the first in the country to perform a non-surgical procedure using sutures to tie off a left atrial appendage (LAA), which is the source of blood clots leading to stroke in ...
Osteoporosis drug may save lives by strengthening immune system
Jul 15, 2009 |
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An osteoporosis drug proven to save lives after hip fractures may do so by strengthening the body's immune system, according to geriatrics researchers at Duke University Medical Center.
Expert consensus on catheter ablation of ventricular arrhythmias
May 14, 2009 |
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A call to action for more research to be undertaken into catheter ablation in the field of ventricular arrhythmia (VA) has been issued in a joint consensus document from the European Heart Rhythm Association (EHRA) a registered ...
Brain works best when cells keep right rhythms
Apr 26, 2009 |
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It is said that each of us marches to the beat of a different drum, but new Stanford University research suggests that brain cells need to follow specific rhythms that must be kept for proper brain functioning. These rhythms ...
Targeted drug therapy prevents exercise-induced arrhythmias
Mar 29, 2009 |
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A 12-year-old Dutch boy - bedridden for three years because of an inherited cardiac arrhythmia syndrome - can now join his friends on the soccer field thanks to a discovery made by Vanderbilt University Medical Center researchers.
Faster, better diagnosis for patients with heart rhythm disorders
Mar 25, 2009 |
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Patients with heart rhythm disorders can look forward to better and faster diagnosis and treatment thanks to the latest generation of electrophysiology equipment used this week for the first time in North America at the Peter ...
Kidney disease increases the risk of stroke in patients
Mar 04, 2009 |
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Chronic kidney disease increases the risk of stroke in patients with atrial fibrillation (AF), the most common type of heart arrhythmia, according to a new study by Kaiser Permanente researchers in the current online issue ...
The Medical Minute: Putting the freeze on abnormal heart beats
Feb 25, 2009 |
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(PhysOrg.com) -- In some people, the heart has a tendency to race due to abnormal electrical signals that tell the heart muscle when to contract. Abnormal electrical activation of the heart with changes in the rate or regular ...
Studies point to novel target for treating arrhythmias
Jan 21, 2009 |
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Abnormal heart rhythms - arrhythmias - are killers. They strike without warning, causing sudden cardiac death, which accounts for about 10 percent of all deaths in the United States.
New mechanism for cardiac arrhythmia discovered
Sep 18, 2008 |
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It has long been thought that virus infections can cause cardiac arrhythmia. But why has not been understood. Ulrike Lisewski, Dr. Yu Shi, Michael Radke and Professor Michael Gotthardt of the Max Delbrück Center for Molecular ...
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