Cardiology

Question 1

Heart rate calculation if speed of paper is 25 mm/sec

Answer 1

Number of small squares x 0.04

Then 60 divided by the answer

Eg: 20 x 0.04 = 0.8
60/0.8= 75

Question 2

Heart rate calculation if speed of paper is 50 mm/sec

Answer 2

Number of small square x 0.02

Then 60 divided by answer

Question 3

PR interval

Answer 3

Beginning of P wave to beginning of Q wave

0.2 sec

Question 4

Ventricular Activation Time (VAT)

Answer 4

QRS start to peak of R wave
And is 0.03-0.05 sec

Question 5

QT interval

Answer 5

Beginning of QRS to end of T wave

0.42 to 0.45 sec