Sinus arrhythmia
Sinus arrhythmia is a commonly encountered variation of normal sinus rhythm. Sinus arrhythmia characteristically presents with an irregular rate in which the variation in the R-R interval vary by more than 0.12 seconds (120 milliseconds). Additionally, P waves are typically mono-form and in a pattern consistent with atrial activation originating from the sinus node.
| Sinus arrhythmia | |
|---|---|
| ECG of a 67-year-old man with sinus arrhythmia, hypertension, diabetes and dyslipidemia. | |
| Specialty | Cardiology |
| Diagnostic method | electrocardiogram |
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