Two controversial transplants performed recently in Houston were criticized on the grounds that they involved the application to human patients of techniques that had not been proved safe and effective in experiments with animals. Last week both cases had sequels:
> When Dr. Denton A. Cooley implanted an artificial heart in a man last month, he acted without prior review by the appropriate committees of Baylor University College of Medicine, the college's board chairman charged. In a letter to the National Heart Institute, Baylor's Leonard F. McCollum said that the heart device had...