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Chest, Vol 75, 728-730, Copyright © 1979 by American College of Chest Physicians

ARTICLES

Transient focal septal block

CB Athanassopoulos

A 65-year-old woman with an acute myocardial infarction, as judged by serial enzyme changes, developed transitory Q waves in leads V2 to V4 and leads 2, 3, and aVF during an attack of pain in the chest. These Q waves were not present 12 hours later. It is suggested that these changes represent a focal block in the septal fibers of the left bundle- branch system. This defect could underlie the transient right precordial Q waves seen in myocardial infarction or ischemia, as well as the fixed Q waves of many patients without septal infarction at autopsy.




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Copyright © 1979 by the American College of Chest Physicians.