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Received January 10, 2013; revised manuscript received February 15, 2013; accepted March 19, 2013; released online April 17, 2013 Time for primary review: 27 days Division of Cardiovascular Diseases (J.B.G., R.M.M.), Department of Internal Medicine (H.J.), Mayo Clinic, Rochester, MN, USA Mailing address: Hayan Jouni, MD, Department of Internal Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. Email: jouni.hayan@mayo.edu ISSN-1346-9843 doi: 10.1253/circj.CJ-13-0023 All rights are reserved to the Japanese Circulation Society. For permissions, please e-mail: cj@j-circ.or.jp Diagnosis of Achalasia on Transthoracic Echocardiography With the Use of Oral Contrast