Behrendt DM, Austen WG: Current status of prosthetics for heart valve replacement . Prog Cardiovasc Dis 15:369-401, 1973;.
MacKenzie JW, Almond CH: Expulsion of ball from aortic valve prosthesis . Ann ThoracSurg 2:435-437, 1966;.
Murphy GW, Kramer DH, Deweese JA: Detection of aortic ball variance by a simple radiographic technique . J Thorac Cardiovasc Surg 60:253-256, 1970;.
Herr RH, Starr A, Pierie WR, et al: Aortic valve replacement: A review of six years' experience with the ball-valve prosthesis . Ann Thorac Surg 6:199-218, 1968;.
Weily HS, Steele PP, Davies H, et al: Platelet survival in patients with substitute heart valves . N Engl J Med 290:534-537, 1974;.
Seyfer AE, Heydorn WH, Nelson WP, et al: Starr-Edwards mitral valve failure ten years after replacement surgery: Chronic fibrous obstruction of the prosthesis frustrum area . Circulation 50:372-375, 1974;.
McIntosh CL, Schuette WH: A noninvasive technique for determining aortic and mitral ball variance . Circulation 48(
(suppl 4)
):117, 1973;.
Hylen JC: Durability of prosthetic heart valves . Am Heart J 81:299-303, 1971;.
Hylen JC, Judkins MP, Herr RH, et al: Radiologic diagnosis of aortic ball variance . JAMA 207:1120-1122, 1969;.
Resnicoff SA, Deweese JA: Acute aortic insufficiency due to ball impaction in a "close-clearance" Starr-Edwards aortic prosthesis . Ann Thorac Surg 12:660-662, 1971;.
Mond HG, Clarebrough JK, Dowling JT, et al: Entrapment of the metal ball in series 6310 and 2310 Starr-Edwards prosthetic valves . J Thorac Cardiovasc Surg 64:186-192, 1972;.
Ibarra-Perez C, Rodriguez-Trujillo F, Peres-Redondo H: Engagement of ventricular myocardium by struts of mitral prosthesis: Fatal complications of use of open cage cardiac valves . J Thorac Cardiovasc Surg 61:403-404, 1971;.
Olive PB, Johnson ML, Pomerantz M, et al: Dysfunction of the Beall mitral prosthesis and its detection by cinefluoroscopy and echocardiography . Am J Cardiol 31:393-396, 1973;.
Merendino KA, Manhas DR: Man-made gallstones: A new entity following cardiac valve replacement . Ann Surg 177:694-704, 1973;.
Edgett JW, Nelson WP, Hall RJ, et al: A complication of valve replacement by a cagedlens prosthesis . Circulation 36:422-426, 1967;.
Cokkinos DV, Voridis E, Bakoulas G, et al: Thrombosis of two high-flow prosthetic valves . J Thorac Cardiovasc Surg 62:947-949, 1971;.