Patricia voiced Velma from 1976 to 1979. However her biggest acting accomplishment was her being a cast member of the TV series M*A*S*H, in which she portrayed various nurses.
A description of her M*A*S*H roles is at MASH4077TV.com.
An obituary states the following about Patricia later years:
"During the latter stages of her career, Pat found a calling in teaching acting and directing. She was particularly proud of her work with elementary and secondary education teachers, integrating art into the regular curriculum including science and history."1
Information Source
1Patricia Stevens. Tributes.com. Retrieved from http://www.tributes.com/show/Patricia-Stevens-88617011