Dr. Rafael Martinez Sanz working as a Professor of surgery, University of  La Laguna, Tenerife. He has graduated from University of Valladolid. Spain, in 1977. And He has completed his Ph.d at University of Cantabria. Spain, in 1982. He is member of Cardiovascular Surgery Board. University of Cantabria, Spain. Fellow American College of Angiology and European Board of Cardiovascular and Thoracic Surgeon.