ECGs

Question 1

What Wave represents the conduction of current down the atria and internodal pathways. From SA node?

Answer 1

P wave

Question 2

What wave represents the initial slowing of the current as it goes through the AV node and then travels through prukinye fibres causing ventricular contraction?

Answer 2

QRS

Question 3

What wave represents the cardiac muscle relaxation as membrane repolarises?

Answer 3

T wave

Question 4

What is Lead ii?

Answer 4

??

Question 5

Which Lead will show the largest QRS?

Answer 5

aVF

Question 6

Which Lead will show the largest QRS?

Answer 6

aVF???

Question 7

Whenever the direction of electrical activity is towards a lead you get a x deflection in that lead.

Whenever the direction of electrical activity is away from a lead you get a y deflection in that lead.

Answer 7

x- positive

y - negative

Question 8

What is a normal cardiac axis?

Answer 8

-30° and +90º

Question 9

What is atrial fibrillation?

Answer 9

Loss of P wave

• other cells can becme myogencially able to form pacemakers - drown out the signa

Question 10

What is atrial flutter?

Answer 10

Saw-tooth pattern in ECG