Understanding Normal Sinus Rhythm

Where does the normal sinus rhythm originate in the heart?

• SA node

• AV node

• Bundle of His

• Purkinje fibers

What is the normal range for the atrial rate in a normal sinus rhythm?

• 100 to 120 beats per minute

• 120 to 140 beats per minute

• 60 to 100 beats per minute

• 40 to 60 beats per minute

What is the maximum duration for a normal PR interval?

• 0.15 seconds

• 0.10 seconds

• 0.20 seconds

• 0.25 seconds

What should the QT interval measure in a normal sinus rhythm?

• 0.44 to 0.50 seconds

• 0.20 to 0.30 seconds

• 0.30 to 0.36 seconds

• 0.36 to 0.44 seconds

Why is it important for nurses to monitor a patient's heart rhythm?

• To ensure the patient is awake

• To measure blood pressure

• To check for deviations from normal sinus rhythm

• To assess lung function