Making three-dimensional echocardiography more tangible: a workflow for three-dimensional printing with echocardiographic data oleh Azad Mashari MD, Mario Montealegre-Gallegos MD, Ziyad Knio BS, Lu Yeh MD, Jelliffe Jeganathan MBBS, Robina Matyal MD, Kamal R Khabbaz MD, Feroze Mahmood MD