BUXBAUM ET AL when given to the mother in the first trimester of pregnancy remains to be determined. Anticoagulants were not effective or adequate to eliminate completely the risk of thromboembolism. However the patients who stopped the treatment during pregnancy carried a higher risk than those who continued and than those who never received anticoagulants. 1 Ueland K, Tatum HJ, Metcalfe J: Pregnancy and prosthetic heart valves. Report of successful pregnancies in two patients with Starr-Edwards aortic valves. Obstet Gynec 27 :257-260, 1966 2 Strickland NR, Mount J : Pregnancy after treatment of aortic stenosis and insufficiency with a Starr-Edwards valve. Obstet Gynec 27:508-510, 1966 3 Johnson AS, Meyers MP, Eckhous AS, et al: Successful pregnancies in patients with ~rosthetic mitral valves. Mich Med 65:718-719, 1966 4 Broustet P, Duhourg G , Mahon R: Grossesse et accouchement apri.s chirurgie cardiaque. 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JAMA 139:758-762, 1949 25 Disaia PJ: Pregnancy and delivery of a patient with a Starr-Edwards mitral valve prosthesis. Obstet Gynec 28: 469-472, 1966 26 Kerber IF, Warr OS 111, Richardson C: Pregnancy in a patient with a prosthetic ~nitralvalve. JAMA 203:223225, 1968 27 Hultgreen H, Hubis H, Shumway N : Cardiac function following mitral valve replacement. Amer Heart J 75:302312,1968 28 McHenry hlM, Smeloff EA, Davey TB, et al: Hemodynamic results with full-flow orifice prosthetic valves. Circulation 35 (suppl I ) :24-33, 1967 29 Bristow JD, McCord CW, Stnrr A, et al: Clinical and hemodynamic results of aortic valvular replacement with a ball valve prosthesis. Circulation 29( suppl I ) :36-48, 1964 30 Ross J Jr, Morrow AG, Mason DT, et al: Left ventricular function following replacement of the aortic valve. Hemodynamic responses to muscular exercise. Circr~iation 33:507,1966 31 Harthorne JW, Rrtckley hlJ, (;ro\rer JW, et al: Valve replacenlent during pregnancy. Ann Intern hied 67: 10321034, 1967 32 Bloonifieltl DK, Ruhinstein 1,I: hlitral valve prosthesis, and pregnancy. Lancet 2:290warfarin anticoag~~lation, 291,1969 33 Laros RE, Hage l l L , Hayashi RH: Pregnancy and heart valve prosthesis. Ohstet Cynec 35:241-247, 1970 Reprint requests: Dr. Aygen. Beilinson Hospital, Petah Tiqva, Israel. Erratum In the article "Advantages of the Beall Valve Prosthesis" by Vogel e t a1 (Chest 59:249, 1871) figures 1 and 5 were reversed. CHEST, VOL. 59, NO. 6, JUNE 1971 Downloaded From: http://journal.publications.chestnet.org/ on 06/11/2014