Sinus rhythm with frequent PACs with aberrant conduction

Sinus rhythm with frequent PACs with aberrant conduction.
(A) Lead V1 and lead II rhythm strips show sinus rhythm with the 1^st, 3^rd, 5^th, 7^th, 9^th, and 11^th beats preceded by normal sinus P waves. The 2^nd, 4^th, 6^th, 8^th, 10^th, and 12^th beats are all PACs. However, while the 4^th, 10^th, and 12^th beats conduct normally, the 2^nd, 6^th, 8^th, and 12^th beats conduct with a wide QRS complex due to aberrant conduction with a RBBB morphology evident in lead V1. In lead II, the aberrantly conducted PACs have a similar appearance to normally conducted PACs except for a deep terminal S wave and some QRS widening due to the rate-related RBBB.
(B) Lead V1 and lead II rhythm strips show sinus rhythm with a PAC with aberrant conduction (3^rd beat) and with an interpolated PVC (8^th beat).