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To this end, the measured rotation of short\u2010axis sections is incorporated into our 3D reconstruction of LV from 2D echocardiography, which serves as input to the curvilinear immersed boundary framework for LV flow simulations. The geometry is validated against sonomicrometry measurements, whose difference is found to be within the typical myocardium thickness range, and the flow is validated against intracardiac flow velocity measured by Doppler ultrasound. To assess the impact of torsion, two simulations (one including torsion and one without in the reconstruction from the same set of images) are compared. It is found that including torsion in reconstruction for a normal LV does not change the geometry, and consequently the volume and flow rates, due to the circular shape of LV short\u2010axis sections. However, the time\u2010averaged wall shear force increases by 12.6% during systole and drops by 4.9% during diastole when torsion is included. Torsion also reduces washout efficiency for this subject, as the volume of fluid with residence time under one cycle is 16.6% lower, while fluid staying 1\u20132\u2009cycles increases by 3.7%. Viscous frictional energy loss decreases by 3.8% for LV with torsion.<\/jats:p>","DOI":"10.1002\/cnm.70220","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T23:57:44Z","timestamp":1791503864000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Incorporating Torsion Into\n                    <scp>3D<\/scp>\n                    Geometric Reconstruction of Left\u2010Ventricle From\n                    <scp>2D<\/scp>\n                    Echocardiography and Its Impact on Hemodynamics"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-5256-8727","authenticated-orcid":false,"given":"Sai Sree Chandra","family":"Sirani","sequence":"first","affiliation":[{"name":"J. 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