Dr. Chester D. Swope, 94, an osteopath who practiced here for 66 years, died Tuesday of cardiac arrest at Circle Terrace Hospital in Alexandria.

He was active until Oct, 11, 1976, when he saw four patients on the dame day was admitted to a hospital for a two-month stay, according to his nephew, Felix Swope.

Dr. Swope was born in Cedar Hill, a rural community in Fairfield County, Ohio. He was a 1908 graduate of the American School of Osteopathy (now the Kirksville College of Osteopathic Medicine), in Kirksville, Mo., and served on the school's faculty during 1909-10.

After leaving Missouri, Dr. Swope came here to open a practice. He was active in Washington professional and civic organizations.

A life member of the American Osteopathic Association, Dr. Swope served on more than a dozen committees and was president of the organization in 1924-25. He also was president of the Osteopathic Association of the District of Columbia for several years and past president of the Rotary Club here and the District of Columbia Boys Club.

Dr. Swope was a member of the Temple - Noyes - Cathedral Masonic Lodge, the Columbia Country Club, the Blue Ridge Club and the Racquet Club.

For more than 30 years, he chaired the public affairs committee of the AOA, and was credited by colleagues with influencing legislation in Congress that upgraded the role of osteopathic medicine.

In 1938, the Federal Employees Compensation Act was amended so that injured or sick federal workers could choose an osteopath as their physician, and in 1956, osteopaths were made eligible for commissions in the medical corps of the Department of Defense.

In addition to his nephew, Dr. Swope is survived by a son, Bradford, of San Francisco.

The family requests that contributions be made to the Rotary Foundation or the Kirkville College of Osteopathic Medicine development fund.