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Congenitally Corrected Transposition of the Great Arteries Associated with the Pre-excitation Syndrome

NAKAJIMA, KENICHI, M.D.; BUNKO, HISASHI, M.D.; TONAMI, NORIHISA, M.D.; HISADA, KINICHI, M.D.; MUKAI, KEIICHI, M.D.*; MISAKI, TAKURO, M.D.*; IWA, TAKASHI, M.D.*

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A case with congenitally corrected transposition of the great arteries associated with the pre-excitation syndrome is presented. A gated-blood-pool study and Tl- 201 myocardial imaging were performed using SPECT. The tomographic gated-blood-pool images showed the shapes of the right ventricle (RV) and left ventricle (LV), i.e., anatomically LV and RV respectively, to be reversed from that of normal patients. The relationships of the great vessels and ventricles also were easily visualized. RV hypertrophy (anatomical LV) was visualized on the TI-201 images. Phase analysis showed the earliest excitation was in the anteroseptal region near the base of the LV, which was consistent with the site of the accessory conduction pathway. The gated-blood-pool and TI-201 tomographic studies were helpful for demonstrating the corrected transposition of the great arteries and the pre-excitation syndrome.

*From the Department of Nuclear Medicine, Kanazawa University School of Medicine, Kanazawa, Japan

From the First Department of Surgery, Kanazawa University School of Medicine, Kanazawa, Japan

© Lippincott-Raven Publishers.