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Cardiology May 09, 2013 | not rated yet | 0
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Cardiology May 09, 2013 | not rated yet | 0
Inherited ventricular arrhythmias are an important cause of morbidity and sudden cardiac death in children who have structurally normal hearts. Despite conventional medical therapy, some of these children remain symptomatic ...
Cardiology May 07, 2013 | not rated yet | 0
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Cardiology Apr 16, 2013 | not rated yet | 0 |
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Medical research Apr 03, 2013 | 5 / 5 (5) | 1 |
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Neuroscience Apr 01, 2013 | 5 / 5 (1) | 0
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Medical research Mar 22, 2013 | 5 / 5 (1) | 0 |
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Health Mar 18, 2013 | not rated yet | 0
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Cardiology Mar 14, 2013 | 5 / 5 (3) | 0 |
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Medical research Feb 22, 2013 | 5 / 5 (3) | 0
New research at Saint Louis University shows physicians do not talk to patients about the psychosocial impact and long-term risks of implanting cardioverter defibrillators (ICDs) to treat irregular heart rhythms, leaving ...
Cardiology Feb 19, 2013 | not rated yet | 0
Using two different compounds they developed, scientists from the Florida campus of The Scripps Research Institute (TSRI) have been able to show in animal models that inhibiting a specific enzyme protects heart cells and ...
Cardiology Feb 07, 2013 | 4 / 5 (1) | 0 |
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Cardiology Feb 06, 2013 | 5 / 5 (1) | 0 |
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Neuroscience Jan 14, 2013 | 4 / 5 (2) | 1 |
Cardiac dysrhythmia (also known as arrhythmia and irregular heartbeat) is 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. Others cause symptoms such as an abnormal awareness of heart beat (palpitations), and may be merely annoying. These palpitations have also been known to be caused by atrial/ventricular fibrillation, wire faults, and other technical or mechanical issues in cardiac pacemakers/defibrillators. Still others may not be associated with any symptoms at all, but may predispose the patient to potentially life threatening stroke or embolism.
Some arrhythmias are very minor and can be regarded as normal variants. In fact, most people will on occasion feel their heart skip a beat, or give an occasional extra strong beat; neither of these is usually a cause for alarm.
Proarrhythmia is a new or more frequent occurrence of pre-existing arrhythmias, paradoxically precipitated by antiarrhythmic therapy, which means it is a side effect associated with the administration of some existing antiarrhythmic drugs, as well as drugs for other indications. In other words, it is a tendency of antiarrhythmic drugs to facilitate emergence of new arrhythmias.
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.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
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