sinus arrhythmia


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Related to sinus arrhythmia: Sinus tachycardia

arrhythmia

 [ah-rith´me-ah]
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.

si·nus ar·rhyth·mi·a

rhythmic, repetitive irregularity of the heartbeat, the heart being under the control of its normal pacemaker, the sinuatrial node.
Synonym(s): juvenile arrhythmia

sinus 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.

arrhythmia

variation from the normal rhythm, especially of the heartbeat. See also bradycardia, tachycardia.

atrial arrhythmia
see atrial flutter, atrial fibrillation.
bradycardic arrhythmia
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
see sinoatrial arrest, atrial tachycardia, supraventricular tachycardia, atrial fibrillation.
ventricular a's
see premature heartbeats, ventricular tachycardia, ventricular fibrillation.
References in periodicals archive ?
1965 Patterns of sinus arrhythmia in patients with lesions of the central nervous system.
Relationship between changes in EMG and respiratory sinus arrhythmia in a study of relaxation therapy for asthma.
Heart rate turbulence (HRT) expresses ventriculophasic sinus arrhythmia and has been considered to reflect cardiac autonomic activity.
All of the children had their electrodermal responses (EDR), their respiratory sinus arrhythmia (RSA), and their cardiac pre-ejection period (PEP) measured during three successive experimental conditions: a 5-minute baseline, a monetary incentive task, and negative mood induction via an emotionally evocative film clip.
His 12 lead ECG on the morning of surgery showed sinus arrhythmia, short PR interval, HR 96/min and few premature ventricular contractions.
Patients with COPD have elevated resting heart rate, reduced baroreflex sensitivity, reduced respiratory sinus arrhythmia, a direct increase in muscle sympathetic nerve activity and abnormal heart rate recovery (HRR) following exercise.
DIAGNOSIS: Sinus rhythm with monomorphic ventricular bigeminy and ventriculophasic sinus arrhythmia.
The researchers were interested in seeing if there were physical differences in the way high-power people and low-power people responded to others' suffering; specifically they wanted to test if high-powered individuals would exhibit greater autonomic emotion regulation [or respiratory sinus arrhythmia (RSA) reactivity].
This rhythmic shortening and lengthening of the P-R intervals is usually due to slight sinus arrhythmia while the junctional rhythm is more regular.