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. Author manuscript; available in PMC: 2009 Jul 6.
Published in final edited form as: Acad Radiol. 2007 Sep;14(9):1108–1112. doi: 10.1016/j.acra.2007.05.019

Fig. 4.

Fig. 4

Illustration of Step 2. The long black line from the cardiac apex through the mitral valve defines the plane of a 4-chamber view. The volume sketch in the upper left-hand corner shows the plane of the main illustration in relation to the surface of the heart.