In 1962, Dr. Dupler was governor of Eastern Pennsylvania for the American
College of Cardiology, and in 1964, was chairman of the college's board of directors. He received the college's Distinguished Fellowship Award in 1979.
A native of Chicago, Dr. Dupler earned his medical degree from Harvard Medical School in 1940, after completing undergraduate work at Juniata College in Huntingdon, Pa.
He served his residency at Graduate Hospital and in 1943, entered the Navy during World War II. He was chief medical officer aboard the destroyer Robinson in the Pacific and completed his tour of duty at the Naval Hospital in Philadelphia.
Dr. Dupler moved to Bryn Mawr from Philadelphia about 1957.
His professional memberships included the American Medical Association and the Philadelphia College of Physicians. He also was a member of the Philadelphia Country Club and the Merion Cricket Club.
He is survived by his wife of 51 years, Ellen Igo Dupler; a son, Donald A. Jr.; a daughter, Deborah Kay; and a sister.
A memorial service will be held at 11 a.m. today in the Chapel of Bryn Mawr Presbyterian Church, 625 Montgomery Ave., Bryn Mawr. Private burial will be in West Laurel Hill Cemetery, Bala Cynwyd.
In lieu of flowers, memorial contributions may be sent to the Endowment Fund, American College of Cardiology Heart House, 9111 Old Georgetown Rd., Bethesda, Md. 20814, or to the Lankenau Foundation, Lankenau Hospital, 100 Lancaster Ave., Wynnewood, Pa. 19096.