Equine 2

Question 1

what is the most commonly occuring congenital heart defect in horses

Answer 1

VSD

Question 2

VSD:
1. which way does the blood shunt
2. PMI

Answer 2

1. left to right
2. right side but heard bilaterally

Question 3

What is the most common pathologic arrythmia in horses?

Answer 3

atrial fibrillation

Question 4

ECG findings of afib?

Answer 4

• irregularly irregular
• rr interval variable
• no P waves
• tall R waves
• oscillations

Question 5

tx of afib

Answer 5

quinidine

Question 6

what is the most common non-pathologic arrythmia in horses?

Answer 6

second degree av block seen in athletic horses, no impact on performance

Question 7

what are the 2 types of 2nd degree av block

Answer 7

av block = prolonged R-R interval

type 1 mobitz: P-R interval progressively prolonged until P wave w/o QRS

type 2 mobitz: P-R interval unchanged and occassionally see P without a QRS

Question 8

what is the most common type of valvular regurg in older horses? does it have impact on performance?

Answer 8

No, incidiental finding