Aberrant ventricular conduction is a common electrocardiographic (EKG) manifestation that occurs when the supraventricular electrical impulse is conducted abnormally through the ventricular conducting system. This results in a wide QRS complex

What are two examples of aberrant conduction?

1) Atrial fibrillation( AF): Figure 2; 2) Atrial tachycardia; 3) Premature Atrial Contractions. In this case aberration occurs when a short cycle follows a long one.

Why do aberrant PACS occur?

Aberrant conduction occurs simply because the right and left bundle branches have different lengths of refractory periods. In Figure 2, the shaded area is the refractory period of the left and right bundle branches. As can be seen, one bundle branch, usually the right, has a longer refractory period than the other.