Morphology display and hemodynamic testing using 3D printing may aid in the prediction of LVOT obstruction after mitral valve replacement

•Left ventricular outflow tract obstruction is a rare but severe complication following mitral valve replacement.•Though being increasingly applied in cardiovascular disease, three-dimensional printed models used in clinical practice are mostly static and contribute more to morphology display.•By transforming an anatomical three-dimensional model into a dynamic model made of flexible material, three-dimensional printing might be great help in predicting LVOT obstruction after surgery.