Remember the Golden rule Less than ½ large box of QRS is atrial induced More than ½ large box of QRS is ventricle induced The bundle block is mostly seen in RBBB at v1 and V2 as two peaks and in LBBB the V6 had two peaks
Correct me if I'm wrong, but I'm 99% certain your first example for SVT is actually sinus tachycardia. There are p waves and t waves, the rhythm is regular and the HR is 120 bpm. In SVT p and t waves aren't distinguishable, and HR is typically 150 to 250 bpm.
