Calculating ECG

Question 1

what is the big picture of cardiac axis~?

Answer 1

It is a big picture of the functional cardiomyocytes

Question 2

which leads can you use to work out cardiac axis?

Answer 2

aVF and I—- best to use
aVL and II
aVR and III

Question 3

What does an augmented lead that shows equal positive and negative deflection mean?

Answer 3

• it means net deflection is close to zero
• therefore the wave of excitation is not moving towards the positive or negative electrode, therefore the axis is about 90 degrees