ECG Course: Junctional Rhythms and Supraventricular Tachycardia

This chapter of the ECG course covers junctional rhythms, including junctional escape rhythm, accelerated junctional rhythm, and junctional tachycardia. It explains the characteristics of each rhythm, such as heart rate, P wave presence, and PR interval. The chapter also introduces supraventricular tachycardia (SVT), discussing its re-entry phenomenon and treatment options like adenosine and vagal maneuvers. The video concludes with a review of key concepts and a transition to the next chapter on ventricular rhythms.

What is the intrinsic rate of the AV junction?

• 80 to 100 beats per minute

• 60 to 80 beats per minute

• 40 to 60 beats per minute

• 20 to 40 beats per minute

Which of the following is a characteristic of a junctional escape rhythm?

• Wide QRS complex

• Rate of 40 to 60 beats per minute

• Irregular rhythm

• Rate of 60 to 100 beats per minute

How does an accelerated junctional rhythm differ from a junctional escape rhythm?

• It has a slower rate

• It has more P waves

• It has a faster rate

• It has a wider QRS complex

What is the rate range for junctional tachycardia?

• Less than 40 beats per minute

• 40 to 60 beats per minute

• 60 to 100 beats per minute

• Greater than 100 beats per minute

In which condition might you see an inverted P wave?

• Atrial fibrillation

• Ventricular tachycardia

• Junctional rhythm

• Sinus rhythm

What does the term 'supraventricular' refer to in SVT?

• Below the ventricles

• Above the ventricles

• Within the ventricles

• Outside the heart

Which treatment is commonly used for supraventricular tachycardia?

• Aspirin

• Adenosine

• Beta-blockers

• Calcium channel blockers

What does 'paroxysmal' mean in the context of PSVT?

• Intermittent

• Constant

• Rapid

• Slow

Which rhythm is characterized by a sawtooth pattern?

• Sinus tachycardia

• Atrial flutter

• Junctional tachycardia

• SVT

What is a key feature of SVT in terms of rhythm regularity?

• Regular rhythm

• Irregular rhythm

• Variable rhythm

• No rhythm