ECG RULES

Question 1

ECG RULE 1:

Answer 1

PR interval should be 120-200 ms or 3 to 5 little squares

Question 2

ECG RULE 2:

Answer 2

Width of QRS complex shoud not exceed 110ms, less than 3 little squares

Question 3

ECG RULE 3:

Answer 3

QRS complex should be dominantly upright in leads I and II

Question 4

ECG RULE 4:

Answer 4

QRS and T waves tend to have same general direction in limb leads

Question 5

ECG RULE 5:

Answer 5

All waves are negative in lead aVR

Question 6

ECG RULE 6:

Answer 6

R wave must grow from V1 to atleast V4
S wave must grow from V1 to atleast V3

Question 7

ECG RULE 7:

Answer 7

ST segment should start isolectric except in V1 and V2 where it maybe elevated

Question 8

ECG RULE 8:

Answer 8

P waves should be upright in I, II and V2 to V6

Question 9

ECG RULE 9:

Answer 9

There should be no Q wave or only a small q less than 0.04s in width in I, II, V2 to V6

Question 10

ECG RULE 10:

Answer 10

The T wave must be upright in I, II, V2 to V6