School of Medicine
Showing 171-180 of 260 Results
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Stephen R. Viess, MD
Clinical Assistant Professor, Orthopaedic Surgery
BioDr. Viess is a board-certified orthopaedic surgeon with subspecialty board certification in sports medicine.He delivers care at Stanford Health Care – ValleyCare in Pleasanton. Dr. Viess focuses on arthroscopic surgery and sports medicine, with a special interest in arthroscopic reconstruction of the shoulder and knee.
Topics include the biomechanics of pitching, and shoulder and elbow injuries in the throwing athlete. Dr. Viess is a fellow of the American Academy of Orthopaedic Surgery and a member of the California Orthopaedic Association.
He strives to offer his patients the most advanced, least invasive surgical procedures, including ACL reconstruction, meniscal surgery, and arthroscopic rotator cuff and labral repairs. Dr. Viess has extensive experience in the management and treatment of sports- related orthopedic injuries. He served as Assistant Team Physician
for Major League Baseball’s Oakland As, providing game coverage and conducting pre- and post-season physical exams. For six years, Dr. Viess directed the Stanford Health Care – ValleyCare Sports Medicine Program. He also served as the team physician for Granada High School in Livermore, California.
In addition to his clinical practice, Dr. Viess has conducted research, including a 10-year review of clinical satisfaction, revision rates, and radiographic evidence of stem fixation associated with the Ultimate-C femoral stem. He also led a study evaluating capsular sling repair during total hip arthroplasty.
Dr. Viess has made numerous presentations to peers and to the community. Peer-targeted topics include graft selection in ACL reconstruction, concussion
management, and on-field management of spine injuries. At the Lake Tahoe Sports Medicine Conference, he has presented lectures on PCL ruptures, multi-ligament knee injuries, and AC joint sprains. He also has delivered lectures for family practitioners on the evaluation and physical examination
of orthopaedic patients. For the community, Dr. Viess has made presentations at health fairs and schools. Topics include the biomechanics of pitching, and shoulder and elbow injuries in the throwing athlete.
Dr. Viess is a fellow of the American Academy of Orthopaedic Surgery and a member of the California Orthopaedic Association. -
Davis Vigneault
Clinical Scholar, Radiology
Fellow in Rad/Cardiovascular ImagingBioDr. Vigneault is a fellow in cardiovascular imaging at Stanford, where he also completed his residency (including a year as chief resident) in diagnostic radiology. Previously, he received his medical degree from Tufts University School of Medicine and his DPhil in Biomedical Engineering from the University of Oxford through the NIH-Oxford Scholars and Medical Scientist Training Programs. For his graduate degree, Dr. Vigneault worked on novel algorithms for measuring regional cardiac function from cardiac CT and MR, publishing in Radiology, Medical Image Analysis, and the Journal of Cardiovascular Magnetic Resonance, among others. In addition to cardiovascular imaging and deep learning, Dr. Vigneault has a strong interest in open science, having been a frequent contributor of software to large open-source libraries such as ITK and related packages.
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Aaran Vijayakumaran
Postdoctoral Scholar, Biochemistry
BioAaran Vijayakumaran, PhD is a Postdoctoral Scholar at Stanford University School of Medicine, where he researches the cell biology of inherited Parkinson’s Disease in the Department of Biochemistry under Professor Suzanne Pfeffer.
He completed his PhD at the University of Cambridge, applying volumetric electron microscopy and deep-learning based image segmentation to generate the first nanoscale map of the human airway epithelium. His doctoral work revealed how cellular architecture and metabolism remodel during differentiation, with a particular focus on the motile cilia, their rootlets, and their structural contacts with mitochondria and the consequences for mitochondrial metabolism. Beyond research, Aaran is active in the biotech and innovation ecosystem. He was awarded a scholarship to join EnterpriseTECH at Cambridge Judge Business School, served as an Investment Fellow Intern at Syncona, and worked as a Venture Builder Intern at Cambridge Future Tech and OmniBuds, a medical device startup. In these roles, he contributed to early-stage strategy, clinical trial planning, and commercial development.
