Induction of Papillary Growths in the Heart

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Science  20 Mar 1964:
Vol. 143, Issue 3612, pp. 1341-1342
DOI: 10.1126/science.143.3612.1341


Papillary growths appeared on the atrial endocardium of dogs at sites where adjacent surfaces presumably came into contact with a reciprocating motion. It is suggested that the resulting friction stimulates the growth of papillae which then act as pedunculated ballbearings, reducing the friction.