Ten Rules Flashcards
1
Q
Rule 1
A
All waves -‘ve in aVR
2
Q
Rule 2
A
ST should start isoelectric except in V1/V2
3
Q
Rule 3
A
PR interval 120-200 msec (3-5 small sq)
4
Q
Rule 4
A
Width of QRS should not exceed 110-120 msec (<3-4 small sq)
5
Q
Rule 5
A
QRS and T waves in same general direction in limb leads
6
Q
Rule 6
A
R wave in precordial leads must grow at least in V1-V4 (good progression)
7
Q
Rule 7
A
QRS should be mainly upright in leads I and II
8
Q
Rule 8
A
P waves upright in I, II and V2-V6
9
Q
Rule 9
A
No Q wave (or only a small one <1 small sq in width) in I, II and V2-V6
10
Q
Rule 10
A
T wave must be upright in I, II and V2-V6
