1. 1) Alec V, Ottavio A, Felicita A, Manuel JA, Gonzalo BE, Helmut B, Michael A, Thierry PC, Michele DB, Arturo E, Volkmar F, Bernard I, Patrizio L, Luc P, Susanna P, Hans-Joachim S, Gerhard S, Janina S, Karl S, Johanna T, Ulrich OVO, Stephan W, Jose LZ, Marian Z: Guidelines on the management of valvular heart disease: The Joint Task Force on the Management of Valvular Heart Disease of the European Society of Cardiology (ESC) and the European Association for Cardio-Thoracic Surgery (EACTS). Eur Heart J, 2012; 33: 2451-2496
2. 2) Heyde EC: Gastrointestinal bleeding in aortic stenosis. N Engl J Med, 1958; 259: 196
3. 3) Loscalzo J: From clinical observation to mechanism--Heyde's syndrome. N Engl J Med, 2012; 367: 1954-1956
4. 4) Sandra Haberichter RM: Structure and function of von Willebrand factor. V. Marder, W. Aird, J. Bennett, S. Schulman, G. White II editor. Hemostasis and Thrombosis, 6th edn. 2013; 197-207
5. 5) Furlan M, Robles R, Solenthaler M, Wassmer M, Sandoz P, Lammle B: Deficient activity of von Willebrand factorcleaving protease in chronic relapsing thrombotic thrombocytopenic purpura. Blood, 1997; 89: 3097-3103