*Corresponding author:
Department of Cardiac Surgery,
Faculty of medicine, Ain Shams University,
Abbasia square, Cairo, Egypt,
P.O. Box 11517, Cairo, Egypt
Telephone: 00201001008859
Fax: 002022604465
E-mail: hamdi_singab@hotmail.com
drhamdy-ahmed@med.asu.edu.eg
Running title: Mitral valve replacement prostheses
Funding: None