Sinus, Atrial, & Junctional Arrhythmias

Front

In normal sinus rhythm, the P wave is:

Back

Present before every QRS Complex

Front

What is the normal range for the PR interval in a sinus rhythm?

Back

0.12 to 0.20 seconds

Front

What is the normal duration of the QRS complex in a sinus rhythm?

Back

Less than 3 small boxes

Front

Which of the following is a characteristic feature of atrial flutter on an ECG? Sawtooth-like waves in place of P waves, Wide QRS complexes with consistent intervals, Heart rate below 60 beats per minute, Irregularly irregular rhythm with no discernible P waves

Back

Sawtooth-like waves in place of P waves

Front

Which of the following is a characteristic feature of atrial fibrillation on an ECG? Sawtooth-like waves in place of P waves, Wide QRS complexes with consistent intervals, Heart rate between 60-100 beats per minute, Irregularly irregular rhythm with no discernible P waves

Back

Irregularly irregular rhythm with no discernible P waves

Front

What is the heart rate range commonly observed in atrial flutter?

Back

250-350 bpm

Front

Which of the following is the primary pacemaker in a junctional rhythm?

• Bundle of His

, Purkinje fibers, Sinoatrial Node, Atrioventricular Node

Back

Atrioventricular Node

Front

What characteristic is often seen in the P waves of a junctional rhythm?

Back

Absent or Inverted

Front

Which of the following best describes supraventricular tachycardia (SVT)?
A rhythm originating in the ventricles with a rate greater than 100 bpm
A fast heart rate originating above the ventricles with a rate typically greater than 150 bpm
A slow heart rate originating from the atria
A rhythm that involves a regular, narrow QRS complex at 60–100 bpm

Back

A fast heart rate originating above the ventricles with a rate typically greater than 150 bpm