PART 10: Disorders of the Cardiovascular System SECTION 3 Disorders of Rhythm e30 Atlas of Cardiac Arrhythmias | Print | Close Window | < Previous | Next > | Figure e30-17 Figure e30-17 AF with LBBB. The ventricular rhythm is erratically irregular. Coarse fibrillatory waves are best seen in lead V1, with a typical LBBB pattern. |