MRCP questions: War 7

As with previous 'wars' after 'battles' these are just a few quick questions to see if your brain cells have retained the information provided in battles 7.1 to 7.5.

Grab a piece of paper, jot down your answers then compare them to my answers here

Question 1:
An efflux of which ion terminates the cardiac action potential?

Question 2:
What is the mechanism of action of class III antiarrhythmics?


Question 3: 
Name 2 class IV antiarrhythmic drugs

Question 4:
What is the relationship between heart rate and QT?

Question 5:
How do you calculate QT using the Bazzett formula?

Question 6:
State the upper limit of a normal QT

Question 7: 
Name 5 drugs that prolong QT

Question 8:
State 5 metabolic conditions that can prolong QT

Question 9:
Name 2 drugs that increase the effect of adenosine and one that decreases it.

Question 10:
Does positive concordance in the chest leads make a broad complex tachycardia more or less likely to be VT?


answers here