ECG Course: Chapter 11 - AV Blocks Quiz

What is an AV block?

• A type of arrhythmia

• An interruption in the conduction between the atria and ventricles

• A type of sinus rhythm

• A type of ventricular rhythm

What is the characteristic feature of a first degree AV block?

• Wide QRS complexes

• Dropped QRS complexes

• Prolonged PR interval

• Irregular P waves

What is another name for a second degree type 1 AV block?

• Sinus block

• Winky Bach phenomenon

• Complete heart block

• Mobitz 2

In a second degree type 1 AV block, what happens to the PR interval?

• It stays the same

• It shortens

• It gets progressively longer until a beat is dropped

• It disappears

What is the key difference between Mobitz 1 and Mobitz 2 AV blocks?

• Mobitz 2 has no dropped beats

• Mobitz 1 has a progressively lengthening PR interval

• Mobitz 1 has a constant PR interval

• Mobitz 2 has a progressively lengthening PR interval

What is another name for a third degree AV block?

• First degree AV block

• Complete heart block

• Mobitz 1

• Sinus arrest

In a third degree AV block, what is the relationship between the atrial and ventricular rhythms?

• The ventricular rhythm is faster than the atrial rhythm

• The atrial rhythm is faster than the ventricular rhythm

• They are independent of each other

• They are synchronized

What is the typical pattern of a second degree type 1 AV block?

• Wide QRS complexes

• No P waves present

• Progressively lengthening PR interval with a dropped beat

• Constant PR interval with dropped beats

How can you identify a hidden P wave in a third degree AV block?

• By looking for notched T waves

• By measuring the QRS width

• By checking the PR interval

• By counting the number of QRS complexes

What is the first question to ask when identifying an AV block on an EKG strip?

• Is the heart rate normal?

• Are there any dropped beats?

• Is the PR interval a constant length?

• Is the QRS complex wide?