The Lab

Rhythms

Sinus Arrhythmia

Cyclic sinus RR variability with a consistent P morphology and conducted QRS. A benign pattern alone does not imply shock.

Overview

Open Clinical controls → Baseline vitals → Rhythm and choose Sinus Arrhythmia. The rate and atrial/ventricular timing follow this rhythm’s model.

Cyclic sinus RR variability with a consistent P morphology and conducted QRS. A benign pattern alone does not imply shock.

The disease state remains active. Disease morphology, treatment and temporary pacing can modify the displayed result; use the effective rate and the current twelve-lead read.

Step by step

  1. Select the rhythm, then adjust Ventricular rate if required.
  2. Compare Lead II, V1 and the arterial pulse.
  3. Open 12-lead ECG; use Variant or Next variant, then Pause → Interpretation.

References & further reading

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