Chapter 11 - Intraventricular conduction defects

Question 1

what anatomical structure divides the left and right bundle branches?

Answer 1

Bundle of His

Question 2

The left bundle branch further divides into what two structures?

Answer 2

anterior and posterior

Question 3

What are the most common conduction defects in dogs? In cats?

Answer 3

Dogs - left and right bundle branch block. Cats - left anterior fasicular block (LAFB)

Question 4

Describe the ECG characteristics of a right bundle branch block

Answer 4

QRS is prolonged, deep (negative) and usually has slurred S waves

Question 5

Describe the ECG characteristics of a left bundle branch block

Answer 5

the QRS is very prolonged, positive complexes

Question 6

Describe the ECG characteristics of left anterior fasicular block

Answer 6

normal duration QRS, tall R waves, MEA is to the left, can occur with afib

Question 7

What is broad complex tachycardia?

Answer 7

if a supraventricular tachycardia is associated with aberrant ventricular conduction, it can mimic ventricular tachycardia. Also known as intermittent ventricular aberrancy