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Yellow paper document sent by Lowell Edwards to Albert Starr regarding the use of Teflon tubing on the dog heart valve. 1961 February 23 The M. Lowell Edwards Public Hi [...]

Yellow paper document sent to Albert Starr in which M. Lowell Edwards discusses changes to the valve design, sewing ring and oscillating ball. 1960 December 7 The M. Lo [...]

Color digital photograph of six Starr-Edwards heart valve prototypes arranged in two rows of three each. The valves are ball-and-cage design and show various materials us [...]

Manuscript notes with formulas and measurements for parts of the Starr-Edwards heart valve. circa 1960 The M. Lowell Edwards Public History Project was made possible by [...]

Manuscript notes with schematics and formulas for the Starr-Edwards heart valve. Shows velocity through the #3 valve at heart stroke. circa 1960 The M. Lowell Edwards P [...]

Manuscript notes showing measurements, figures and notes on the design of the ball and cage valves including ball to opening ratio, ball size, and availability of materia [...]

Color digital photograph of a Starr-Edwards heart valve prototype, ball-and-cage design with a plastic cage. The valve is lying on its side. circa 1957 - 1960

Color digital photograph of a Starr-Edwards heart valve prototype, ball-and-cage design with plastic cage. Valve sits next to a ruler for scale.

Color digital photograph of a Starr-Edwards heart valve prototype, ball-and-cage design with metal struts and close in focus on the ball.

Color digital photograph of a pair of hands pulling back the Silastic shield from the ring of a Starr-Edwards ball-and-cage heart valve prototype. circa 1957 - 1960