In Vivo Analysis of the Anatomical Relationship of Coronary Sinus to Mitral Annulus and Left Circumflex Coronary Artery Using Cardiac Multidetector Computed Tomography
Implications for Percutaneous Coronary Sinus Mitral Annuloplasty
Arti J. Choure, MD*,
Mario J. Garcia, MD, FACC*,
Barbara Hesse, MD*,
Matthew Sevensma, DO*,
George Maly, MD ,
Neil L. Greenberg, PhD*,
Lynn Borzi, RN, MBA*,
Stephen Ellis, MD, FACC*,
E. Murat Tuzcu, MD, FACC* and
Samir R. Kapadia, MD, FACC*, ,*
* Cardiovascular Medicine
Radiology, Cleveland Clinic, Cleveland, Ohio

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Figure 1 Measurement of the distance between the mitral annulus and coronary sinus in standard 2-dimensional planes in (A) 4-chamber view; (B) 2-chamber view; and (C) 3-chamber view. RA = right atrium.
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Figure 2 Reconstructed 3-dimensional image of mitral annulus (MA), coronary sinus (CS), coronary arteries, and aorta. (Point a) Mitral annulus diameter in 4-chamber view (4C). (Point b) Mitral annulus diameter in 2-chamber view (2C); and (point c) Mitral annulus diameter in 3-chamber view (3C). All MA to CS measurements obtained in 2-dimensional images. LCX = left circumflex coronary artery.
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Figure 3 (A) Mapping of coronary sinus (CS) in 2-dimensional view. (B) Reconstructed 3-dimensional image showing the left circumflex coronary artery crossing "under (or deep to)" the CS.
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Figure 4 (A) Mapping of the coronary sinus (CS) in 2-dimensional view. (B) Reconstructed 3-dimensional imaging showing the left circumflex coronary artery crossing "above (or superficial to)" the CS.
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