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(Circulation. 1963;28:1110.)
© 1963 American Heart Association, Inc.

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The Giant "A" Wave of the Left Atrial Appendage

D. EDMOND MILLER LCDR, MC, USNR¹; DONALD H. TUCKER LT, MC, USNR¹; WILLIAM J. JACOBY JR. CDR, MC, USN¹

¹ From the Cardiopulmonary Function Laboratory, Department of Medicine, U. S. Naval Hospital, Portsmouth, Virginia.

Giant "a" waves, not present in any other location in the left atrium, were recorded in four cases in the left atrial appendage. The location was confirmed by cineangiocardiography.