Sinus Arrhythmia & Pause — ECG Academy Lesson

Distinguish sinus arrhythmia from pathologic irregular rhythms, recognize sinus pause and arrest on a rhythm strip, and understand the clinical significance of the 3-second pause threshold.

Learning Objectives

• Define sinus arrhythmia and its relationship to the respiratory cycle
• Explain why sinus arrhythmia is generally benign and common in young patients
• Differentiate sinus arrhythmia from other irregular rhythms by P wave morphology consistency
• Define sinus pause (sinus arrest) and sinus exit block
• State the 3-second pause threshold and the required monitor tech response