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Related to sinus arrhythmia: Sinus tachycardia
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.
rhythmic, repetitive irregularity of the heartbeat, the heart being under the control of its normal pacemaker, the sinuatrial node.
Synonym(s): juvenile arrhythmia
an irregular cardiac rhythm in which the heart rate usually increases during inspiration and decreases during expiration. It is common in children and young adults and has no clinical significance except in elderly patients.
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.
one which is clinically insignificant.
irregularity of the normal heart rhythm, either in frequency or amplitude, or almost always both.
a cause of poor racing performance or sudden death while racing; detectable only by telemetered electrocardiography.
the physiological cyclic variation in heart rate related to vagal impulses to the sinoatrial node.