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. 2015 May 14;3(1):23. doi: 10.1186/s40560-015-0090-7

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© Blanco and Sasai; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Example for estimating the pulmonary vascular resistance. a. Right ventricle outflow tract velocity time integral (12.6 cm) obtained in parasternal short-axis view. b. Right ventricle to right atrial peak velocity (2.7 m/s) obtained from a tricuspid regurgitation jet in apical four-chamber view. PVR is obtained as (2.7 /12.6) × 10 + 0.16, equal to 2.3 Wood units (normal <1.5)