PART 10: Disorders of the Cardiovascular System SECTION 3 Disorders of Rhythm e30 Atlas of Cardiac Arrhythmias | Print | Close Window | < Previous | Next > | Figure e30-15 Figure e30-15 Atrial flutter with atrial rate 300/min and variable (predominant 2:1 and 3:1) AV conduction. Typical flutter waves best seen in lead II. |