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cardiac arrhythmia |
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Cardiac arrhythmia An irregular heart rate or rhythm. Mentioned in: Holter Monitoring, Stress Test cardiac arrhythmia Etymology: Gk, kardia + a + rhythmos, without rhythm an abnormal cardiac rate or rhythm. The condition is caused by a failure of the sinus node to maintain its pacemaker function or by a defect in the electrical conduction system. Examples of arrhythmia include bradycardia, ectopic beat, heart block, and tachycardia. arrhythmia variation from the normal rhythm, especially of the heartbeat. See also bradycardia, tachycardia. atrial arrhythmia see atrial flutter, atrial fibrillation. bradycardic arrhythmia see bradyarrhythmia. benign arrhythmia one which is clinically insignificant. cardiac arrhythmia irregularity of the normal heart rhythm, either in frequency or amplitude, or almost always both. exercise-induced arrhythmia a cause of poor racing performance or sudden death while racing; detectable only by telemetered electrocardiography. sinus arrhythmia the physiological cyclic variation in heart rate related to vagal impulses to the sinoatrial node. supraventricular a's ventricular a's cardiac arrhythmia Cardiology Any defect in the heart's electrical activity, which may be detectable only by EKG, or manifest as an abnormality in rate, rhythm, or sequence of cardiac events Clinical From asymptomatic to
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When UO President Dave Frohnmayer collapsed with heart arrythmia in Maryland, Jones sent his private jet to bring Frohnmayer home. They become part of the heart's muscle cells and can stop a sudden heart arrythmia from becoming fatal," says Harris. Also, a study by a Canadian team published last year in The New England Journal of Medicine suggested that ritodrine is not effective and in fact can cause health problems like maternal heart arrythmia, and, in rare instances, death. |
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