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Page 6 · column 1 of 4 · from the scan, no model involved
WORLD’S FIRST USER of three plastic heart valves is Virgil Roberts of Tigard. Oregoa, shows at right displayiag a robot valve aad a model of the hamaa heart. X-Ray at left shows Itmldt the heart poeitioa of devices which replaced aortic. Mitral aad tricaaP*d valves Irreparably damaged by rheamatic heart dirtiet The revolutioaary. 8-hoar sargical procedare was perfarmed by a
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