Francis Andrew "Drew" Gaffney is an American doctor. He previously worked for NASA and participated in the STS-40 Space Life Sciences (SLS 1) Space Shuttle mission in 1991 as a payload specialist. Gaffney was a co-investigator on an experiment that studied human cardiovascular adaption to space flight. The SLS-1 mission crew completed over 18 experiments in nine days, bringing back more medical data than any previous NASA flight. He is currently a professor of medicine at Vanderbilt University. Gaffney has over 50 publications in the areas of cardiovascular regulation and space physiology.