John Stevens serves as Chairman of the Board of Directors for HeartFlow, Inc. He has had a distinguished career as an entrepreneur and healthcare professional. He was the President and CEO of HeartFlow, Co-Founder and CTO of Heartport, the Co-Founder and Executive Chairman of Amp Resources, Co-Founder and Chairman and CEO of Sundrop Fuels. He has had extensive experience founding, investing and leading technology focused companies. He was an Assistant Professor of Cardiovascular Surgery at Stanford University. He received his B.S. from the University of Utah and M.D. from the Stanford University School of Medicine.