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sinus arrhythmia
Variation between the longest & shortest p-wave intervals is > 0.12 seconds. Variation may be phasic with respirations or non phasic. In the phasic variant, the cycle length diminishes with inspiration & increases with expiration. The non phasic variant may be related to variation in vagal tone.
Clinical manifestations: generally asymptomatic
Management:
- workup &/or treatment generally unnecessary
Related
sinus node; sinoatrial node; SA node
sinus rhythm
General
supraventricular arrhythmia
References
- Saunders Manual of Medical Practice, Rakel (ed), WB Saunders,
Philadelphia, 1996, pg 271
- Kusumoto FM, Schoenfeld MH, Barrett C et al
2018 ACC/AHA/HRS Guideline on the Evaluation and Management of Patients With
Bradycardia and Cardiac Conduction Delay: A Report of the American College of
Cardiology/American Heart Association Task Force on Clinical Practice Guidelines
and the Heart Rhythm Society
J Am Coll Cardiol. 2019 Aug 20;74(7):e51-e156.
PMID: 30412709 Free article