Sister Patricia Lab, 44, the president of the Sisters' Council of the Catholic Diocese of Arlington and a former teacher and principal in Arlington and Fairfax parochial schools, was killed May 9 in a highway accident in Ohio.

An official of the Ohio State Highway Patrol said the accident occurred on the Ohio Turnpike in Mahoning County when the car Sister Patricia was driving went out of control, struck a guardrail and turned over.

Sister Patricia, a member of the Sisters of Notre Dame, was born in Ohio. She graduated from St. John's College in Cleveland and earned a master's degree in administration at John Carroll University.

She taught at St. Ann's School in Arlington from 1968, when she moved to the Washington area, until 1970. After a year at St. Agnes' School in Arlington, she returned to St. Ann's as principal and director of religious education. From 1978 to 1980, she was minister of religious education at St. Leo's School in Fairfax.

At the time of her death, Sister Patricia was working on a life of Christ for school children. She lived at St. John's Convent in McLean.

Survivors include her parents, Mr. and Mrs. George Lab of Canton, Ohio, and a brother and a sister.