What are the 10 rules of EKG?

1-PR interval between 3-5 little squares (120-200 ms) 2-QRS less than 3 little square (110 ms) 3-QRS positive in leads I and II 4- QRS and T waves have same direction in limb leads 5-aVR all negative 6-R and S grow from V1 to V4 And S disappears in V6 7-ST segment starts isoelectric except V1 and V2 8-P wave upright in I, II and V2-V6 9-No Q or small Q I,II, v2-v6 (1 little square) 10-T wave upright in I, II, V2-V6