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. 2017 Jan 16;10(1):e005207. doi: 10.1161/CIRCIMAGING.116.005207

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© 2017 The Authors.

Circulation: Cardiovascular Imaging is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited.

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Figure 1. — Left, Schematics of the velocity field at the vena contracta (VC) acquired during systole with continuous Doppler (1D encoded velocity value, top) and 4D flow cardiovascular magnetic resonance (CMR; 3D-encoded 2-dimensional velocity field, bottom). Right, Definition of the anatomic regions to compute the TPD from the left ventricular outflow tract (LVOT; plane 1) to the VC (plane 2). Two other anatomic regions are defined for the Material B in the Data Supplement, the ascending aorta (AA) from the VC to the brachiocephalic artery (plane 3) and the descending aorta (DA) from the left subclavian artery (plane 4) to a plane at the same height of the aortic valve plane (plane 5).