Harrison's Principles of Internal Medicine McGraw Hill
PART 10: Disorders of the Cardiovascular System
SECTION 3   Disorders of Rhythm
e30 Atlas of Cardiac Arrhythmias
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Figure e30-8

Figure e30-8  Multifocal atrial tachycardia with varying P-wave morphologies and P-P intervals; right atrial overload with peaked P waves in II, III, and aVF (with vertical P wave axis); superior QRS axis; slow R-wave progression with delayed transition in precordial leads in patient with severe chronic obstructive lung disease.

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