Naming difficulties may be rank ordered along a continuum. Items are rank ordered in terms of their ability to be named, which is correlated with their frequency. This type of picture-naming test is also useful in the examination of children with learning disabilities and the evaluation of brain-injured adults.
The Jarvik-7 heart was developed by American scientist Robert Jarvik and his mentor, Willem Kolff. In 1982, Seattle dentist Dr. Barney Clark was the first person implanted with the Jarvik-7, the first artificial heart intended to last a lifetime.
William J. Schroeder was one of the first recipients of an artificial heart at the age of 52. On November 25, 1984, Schroeder became the second human recipient of the Jarvik 7. The transplant was performed at Humana Heart Institute International in Louisville, Kentucky by Dr. William C. DeVries.illiam J. Schroeder was one of the first recipients of an artificial heart at the age of 52. On November 25, 1984, Schroeder became the second human recipient of the Jarvik 7. The transplant was performed at Humana Heart Institute International in Louisville, Kentucky by Dr. William C. DeVries.