cardio exam questions

Question 1

A 60-year-old man is seen by his GP complaining of breathlessness and lower limb swelling. His GP measures his B-type natriuretic peptide to aid in the diagnosis of his condition.

Which of the following would stimulate the body to produce B-type natriuretic peptide in heart failure?

Answer 1

B-type natriuretic peptide is released in response to ventricular strain

Question 2

What is the typical stroke volume in a resting 70 Kg man?

Answer 2

70mls

Question 3

which part of an ECG corresponds to beginning od rapid passive ventricular filling?

Answer 3

ST segment

Question 4

which channel is open during plateau phase of action potential in cardiac myocytes?

Answer 4

• voltage gated calcium channel

Question 5

which channel blocked by local anaesthetics?

Answer 5

• voltage gated sodium channel

Question 6

which channel is blocked by drugs causing pharmacologically acquired long QT-syndrome?

Answer 6

• voltage gated potassium channel (delayed rectifier)

Question 7

name mediator when activated caused a reduction in the circulating volume?

Answer 7

BNP