G. DANIEL COPELAND, M.D., F.A.C.P. (ASSOCIATE); NATHAN C. SALKY, M.D.; DANIEL A. BRODY, M.D.
Since 1906, when Cremer (1) first reported use of an intra-esophageal electrocardiographic electrode, such electrodes have been intermittently employed for the study of cardiac mechanisms. Because the esophagus is anatomically located close by the left atrium, a properly placed esophageal electrode is virtually a semidirect lead to the left atrium and electrocardiograms recorded from this position have very large P-waves. The P-waves are frequently small and difficult to identify in routine electrocardiograms recorded from body-surface electrodes, especially in complex cardiac mechanisms. In recent years, the unipolar esophageal lead has been used more frequently in the diagnosis of cardiac arrhythmias with
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COPELAND GD, SALKY NC, BRODY DA. Bipolar Esophageal Electrocardiography in Unusual Cardiac Mechanisms. Ann Intern Med. 1964;60:999–1008. doi: 10.7326/0003-4819-60-6-999
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Published: Ann Intern Med. 1964;60(6):999-1008.
Cardiac Diagnosis and Imaging, Cardiology.
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704
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