sinus arrhythmia(redirected from juvenile arrhythmia)
variation from the normal rhythm, especially of the heartbeat; see also dysrhythmia. adj., adj arrhyth´mic.
sinus arrhythmia the physiologic cyclic variation in heart rate, originating in the sinoatrial node and related to vagal impulses to the node; it occurs commonly in children (juvenile arrhythmia) and in the aged.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
rhythmic, repetitive irregularity of the heartbeat, the heart being under the control of its normal pacemaker, the sinuatrial node.
Synonym(s): juvenile arrhythmia
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si·nus ar·rhyth·mi·a(sī'nŭs ă-ridh'mē-ă)
A cyclic variation in heart rate, usually normal and linked to respiratory movements.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012