Sinus arrhythmia: The Daily PANCE Blueprint

Home Sinus arrhythmia: The Daily PANCE Blueprint

Sinus arrhythmia: The Daily PANCE Blueprint

A 50-year-old woman comes to the clinic for an annual physical. She has no significant medical history and reports feeling well. During her physical examination, an electrocardiogram (ECG) is performed, which reveals a sinus rhythm. The only abnormality is a variation in the P-P interval greater than 120 ms. The patient has no symptoms and denies chest pain, palpitations, or dyspnea. You identify this rhythm as?

A. Sinoatrial pause
B. Atrioventricular block
C. Normal sinus rhythm
D. Sinoatrial block
E. Sinus arrhythmia

Answer and topic summary

Correct Answer: E. Sinus arrhythmia

Sinus arrhythmia is defined as a sinus rhythm with regular P waves, but the P-P intervals vary by more than 120 milliseconds. This is often a benign finding, particularly in young, healthy individuals or those with enhanced vagal tone. It is commonly seen with respiration, where the heart rate increases with inspiration and decreases with expiration (respiratory sinus arrhythmia).

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Covered under ⇒ PANCE Blueprint Cardiology ⇒ Conduction Disorders ⇒ Sinus arrhythmia

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