Dr. Veronika Troost, 63, an area resident since 1948 who had conducted a practice in general medicine here since 1955, died Saturday at her home in Silver Spring. She had a heart ailment.

Dr. Troost, who was born in Latvia to Estonian parents, was a 1944 graduate of the medical school of the University of Tartu in Estonia, which by that time had become part of the Soviet Union. She went to Austria and practiced medicine there until coming to the United States and Washington in 1948.

She interned at the old Emergency Hospital here. From 1950 to 1955, she served her residency and was a medical director at Sibley Memorial Hospital. Since then, she had practiced general medicine in Silver Spring. h

Dr. Troost was a member of the Montgomery County Medical Society and the Women's Medical Society of Washington. She was a member of the Estonian Lutheran Church in Washington and the Kenwood Country Club.

Survivors include her husband of 35 years, the Rev. Rudolf Troost, and a son, Dr. Thomas Rudolph Troost, both of Silver Spring; a daughter, Linda Veronica Troost of Philadelphia, and three brothers, Peter, Endel and Ants Varep, all of Estonia, the Soviet Union.