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 e30-4

Figure e30-4  Sinus rhythm (P wave rate about 60/min) with 2:1 (second-degree) AV block yielding a ventricular (pulse) rate of about 30/min. Left atrial abnormality. RBBB with left anterior fascicular block. Possible inferior MI.

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