PART 10: Disorders of the Cardiovascular System SECTION 3 Disorders of Rhythm e30 Atlas of Cardiac Arrhythmias | Print | Close Window | < Previous | Next > | Figure e30-12 Figure e30-12 Atrial tachycardia [180/min with 2:1 AV block (see lead V1)]. LVH by precordial voltage and nonspecific ST-T changes. Slow R-wave progression (V1−V4) raises consideration of prior anterior MI. |