Cardiology 7-9%

Question 1

The resting membrane potential of -90 in myocardial cells is a function of which
A) passive K
B) active K
C) active Na
D) passive Na

Answer 1

B) Active K

Question 2

Stimulation of barotrceptor causes what?

Answer 2

Increased vagal firing

Question 3

Which of the followin increase contractility
A) higher BP
B) increased extracellular Ca
C) other elextrolyte changes

Answer 3

?
Increased intracellular Ca?

Question 4

What causes AP plateau in the heart?

Answer 4

Ca influx

Question 5

Drugs for hocm cat with enlarged LA

Answer 5

Atenolol in the answers but al out of date !

Question 6

Dog with mild exercise intolerance , muscle wasting, jugular pulses, no HM, split s2
A) pht
B) systemic hypertension
C) mitral stenosis and MR
D) sas

Answer 6

Apprently pht

Question 7

Which endothelial product is reduced in PHT

Answer 7

Prostacycline

Question 8

Congenital abnormality associated with notched / split QRS

Answer 8

TVD

Question 9

Pimobendan causes contractility how ?

Answer 9

Calcium sensitizer = increases affinity of Ca to troponin C

Question 10

6yr Staffy with exercise intolerance, weight loss, S2 click; most likely diagnosis:

Answer 10

PS

Question 11

What cardiac condition is associated with hyperdynamic arterial pulses?

Answer 11

PDA, AR