Andrew Stevenson, 74, an economist and former staff director of the House Committee on Interstate and Foreign Commerce, died Wednesday at Holy Cross Hospital after a heart attack.

Dr. Stevenson, who joined the House Commerce Committee in 1947 and retired in 1969, was the committee's specialist on transportation, securities, public health and matters dealing with the old Federal Power Commission.

Toward the end of this country's scientific studies in Antarctica during the 1958-1959 International Geophysical Year, Dr. Stevenson urged that the desirability of continuing this work be considered. A subcommittee was formed and Dr. Stevenson accompanied the gorup to Antarctica. As a result of its report and recommendation to the president, the U.S. scientific program was extended another year.

Some time later, the late explorer Carl Eklund named an Antarctic bay for him. The name, Stevenson Cove," has been approved by the Board of Geographic Names.

Dr. Stevenson came to Washington in 1935 with the Central Statistical Board, which was established under the National Industrial Recovery Act. He later became an analyst with the Securities and Exchange Commission. He was director of the Transportation Equipment Division of the War Production Board during World War II and later served two years on the Navy's Renegotiation Board.

He was born in Chicago and earned a bachelor's degree from the College of Wooster in Ohio and a doctorate in economics from Yale University. He taught economics and transportation at Kalamazoo College in Michigan from 1929 to 1932.

Dr. Stevenson, who lived in Chevy Chase, was a member of Phi Beta Kappa, the American Society of Mechanical Engineers and the Cosmos Club. k

Survivors include his wife, the former Elizabeth Otis, of Chevy Chase; two sons, Andrew Jr., of Baltimore, and James O., of Fairfax; two brothers, James, of Bethesda, and John, of San Marino, Calif.; a sister, Ruth Everson of Los Angeles, and a grandson.

The family suggests that expressions of sympathy be in the form of contributions to the American Heart Association.