School of Medicine
Showing 11-20 of 21 Results
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E. John Harris Jr.
Professor of Surgery (Vascular), Emeritus
Current Research and Scholarly InterestsI am interested in thrombosis and the role of thrombin and its receptor in venous wall remodeling following venous thrombosis. I am also interested in vascular hemodynamics and the use of ultrasound, MRI and computational modeling in evaluating arterial flow in exercise conditions.
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Karthikeshwar Kasirajan (Kasi)
Clinical Professor, Surgery - Vascular Surgery
BioDr. Kasirajan is a board-certified, fellowship-trained vascular surgeon. Also known as Dr. Kasi, he is a clinical professor of vascular surgery at Stanford University School of Medicine.
Dr. Kasirajan preserves limbs, facilitates access to dialysis, and helps his patients manage conditions such as aneurysms, varicose veins, thoracic outlet syndrome, and deep vein thrombosis. Many of his limb preservation patients smoke, have diabetes, or are experiencing renal failure. Dr. Kasirajan’s experience also centers around the treatment of aneurysms and prevention of strokes.
In all cases, his goal is to provide either noninvasive or minimally invasive management whenever possible. He performs open surgery only when it is the best option. Dr. Kasirajan treats many patients with stents and stent grafts, which can shorten hospital stays and recovery times.
Dr. Kasirajan (Kasi) receives referrals of patients from primary care physicians, nephrologists, podiatrists, cardiologists, woundcare specialists, diabetologists, neurologists, and other specialists. He welcomes referrals as early as possible, ideally before patients become symptomatic. A strong proponent of doing early screening for peripheral artery disease, Dr. Kasirajan advocates for the use of the ankle-brachial index (ABI) in routine physical examinations. When providers detect an imbalance between leg and arm blood pressure, Dr. Kasirajan can help create customized strategies to address the cause before the problem worsens.
In addition to offering excellent vascular care to the community, Dr. Kasirajan joined Stanford to continue pursuing his research interests. He has conducted research into advances in minimally invasive procedures for stroke prevention and for aneurysm management. His research has also focused on how to improve surgery outcomes to help patients suffering from peripheral vascular disease. Dr. Kasirajan has been the investigator in over 40 multicenter studies involving new stent graphs, thrombectomy catheters, and other advances in endovascular technology.
Dr. Kasirajan has made more than 100 presentations worldwide on minimally invasive vascular surgery techniques and preventive care in the vascular patient. He has spoken at multiple conferences including the Society for Vascular Surgery, Peripheral Vascular Society, and the South Asian American Vascular Society. He has earned numerous honors for his academic achievements, including the prestigious Alpha Omega Alpha award for medical student and resident education.
As the author of more than 120 journal articles, Dr. Kasirajan’s work has appeared in the Journal of Vascular Surgery, Endovascular Today, Pharmacogenomics Journal, Catheter Cardiovascular Intervention, and many other publications. He also has authored 20 book chapters in textbooks including Medical Management of the Surgical Patient 5th Edition, Advances in Phlebology and Venus Surgery Volume 1, Current Therapy in Vascular Surgery, Mastery of Surgery, and many more.
Dr. Kasirajan has served on the editorial boards of the Journal of Endovascular Therapy, Annals of Vascular Surgery, International Journal of Angiology, and other publications. -
David Kauvar
Clinical Professor, Surgery - Vascular Surgery
BioDavid Kauvar, MD, MPH is an academic vascular surgeon who received his undergraduate medical education on active duty in the US Army at the Uniformed Services University of the Health Sciences in Bethesda, Maryland. He completed his residency in general surgery at Brooke Army Medical Center in San Antonio, Texas, a surgical research fellowship at the United States Army Institute for Surgical Research, and a clinical fellowship at the University of Utah. His 24-year career as a wartime and vascular surgeon culminated with his retirement in 2022. During his tenure in the military, Dr. Kauvar was a respected surgical educator and became an academic leader in the fields of military and vascular trauma. He earned a Master of Public Health degree from the University of North Texas and was inducted into the Order of Military Medical Merit for his contributions to military medicine.
Dr. Kauvar has served as a general surgery residency associate program director for research and as a residency program director, chair of an institutional review board, and chief of a vascular surgery service. He commanded a combat surgical unit in Afghanistan and led two multimillion-dollar Department of Defense combat casualty care research labs. He has authored over eighty peer-reviewed publications and numerous textbook chapters, has presented research at dozens of national and international surgical meetings and has been invited to speak internationally about vascular trauma as an acknowledged expert in the field.
Dr. Kauvar is now Clinical Professor of Surgery in the Division of Vascular Surgery at Stanford University School of Medicine with his primary clinical responsibilities at Santa Clara Valley Medical Center in San Jose, California. He is married and has one son. -
Derek M. Klarin, MD
Assistant Professor of Surgery (Vascular Surgery)
On Leave from 06/01/2024 To 05/31/2025BioDr. Klarin is a fellowship-trained vascular surgeon.
For each patient, he develops a comprehensive, compassionate care plan customized to individual needs. His goal is to help each patient achieve the best possible health and quality of life.
Dr. Klarin performs the full spectrum of diagnostic and treatment procedures for cardiovascular conditions. He treats carotid disease, peripheral artery disease, abdominal aortic aneurysm, venous thromboembolism, and other vascular diseases.
To help advance his field, Dr. Klarin has conducted research. The American Heart Association, Howard Hughes Medical Institute, and other organizations have provided grants to support his studies. He also has co-patented advances in predicting and scoring risk factors for cardiovascular disease and other conditions.
He has published extensively and co-authored more than 50 articles on new techniques and technology for diagnosing and treating cardiovascular disorders. His work has appeared in the Journal of Vascular Surgery, Circulation, JAMA, Nature Medicine, and other peer-reviewed journals.
He also has made many invited presentations to his peers. He has spoken at the Vascular Research Initiatives Conference presented by the Society for Vascular Surgery, the American Heart Association Scientific Sessions, and the annual meeting of the American Society for Human Genetics. Topics include risk factors for peripheral artery disease, the benefits of ultrasound screening for abdominal aortic aneurysm, and the impact of genetic variations on cardiovascular disease.
He is a member of the Global Lipids Genetics Consortium. He is a founding member of the Abdominal Aortic Aneurysm Genetics Consortium and the Peripheral Artery Disease Genetics Consortium. He is also a candidate member of the Society for Vascular Surgery. -
Jason T. Lee, MD
Professor of Surgery (Vascular Surgery)
Current Research and Scholarly InterestsDr. Lee is the Principal Investigator on several clinical trials examining therapeutic strategies for management of complex aortic aneurysm disease as well as aortic dissection.
Dr. Lees clinical interests include:
Endovascular repair of abdominal/thoracic aneurysms and dissections
Fenestrated and Branch Repair of the thoracic, thoracoabdominal, and abdominal aneurysms
Carotid stenting
Thoracic outlet syndrome
Vascular disorders in high-performance athletes -
Nazish Sayed MD, PhD
Assistant Professor (Research) of Surgery (Vascular Surgery)
Current Research and Scholarly InterestsThe Sayed Laboratory is focused on the development of novel technologies that drive innovation in regenerative medicine, disease modeling, and drug testing in vascular biology. The lab conducts translational research in vascular biology and aims to understand the role of the vasculature in the development of cardiac diseases, including those due to inherited genetic variants or environmental insults such as type 2 diabetes or hypertension. The lab employs the human induced pluripotent stem cell (iPSC) technology to generate patient-specific vascular cells (endothelial and vascular smooth muscle cells) as an alternative to animal models providing a human tissue surrogate for research that is scalable and sustainable. By employing this unique platform, the lab also investigates the role of chemotherapeutic agents (anti-cancer drugs) on the vasculature. Dr. Sayed’s lab has also established an endothelial regeneration program, where they leverage the innate immune system to regenerate endothelial cells from human fibroblasts.
Work from the lab has led to seminal discoveries in the areas of 1) Nitric oxide (NO) biology, (2) vascular biology, (3) stem cell biology, (4) cardiovascular disease modeling (5) cardio-oncology. -
Kenneth Tran, MD
Clinical Assistant Professor, Surgery - Vascular Surgery
BioDr. Tran is a vascular surgeon in the Vascular and Endovascular Surgery Division at Stanford Health Care. He is also a clinical assistant professor in the Department of Surgery, Division of Vascular Surgery at Stanford University School of Medicine.
Dr. Tran’s clinical expertise includes the entire spectrum of vascular surgery, including minimally invasive strategies for aortic aneurysm repair and multiple methods of managing peripheral vascular disease. He also specializes in treating cerebrovascular disease (problems with blood flow in the brain) using carotid angioplasty and stenting, transcarotid artery revascularization, and conventional carotid surgery. In addition, Dr. Tran offers comprehensive dialysis access management and treats venous reflux (when leg veins fail to return blood to the heart).
Dr. Tran has a special interest in minimally invasive techniques for repairing complex aortic conditions using custom stents placed inside blood vessels (endografts). He has expertise in designing, fabricating, and implanting physician-modified endografts tailor-made to each patient’s unique aortic anatomy. This technique expands the ability to offer minimally invasive repair to more patients.
Dr. Tran’s research efforts focus on utilizing novel computational approaches to better understand and optimize blood flow patterns after complex aortic repair. This work has helped improve the understanding of how different types of aneurysm repair perform long term. Dr. Tran hopes to use these research findings to improve clinical outcomes for patients with aortic aneurysmal disease.
Dr. Tran has published his work in numerous prestigious peer-reviewed journals, including the Journal of Vascular Surgery, JAMA Surgery, and the European Journal of Vascular and Endovascular Surgery. He has presented at the podium at numerous national and international conferences.
Dr. Tran has received multiple research awards, including the Vascular and Endovascular Surgery Society’s Medtronic Resident Research Award and Best Resident Presentation at the Swiss Society for Vascular Diseases. In addition, he received the Young Researcher Prize at the European Symposium on Vascular Biomaterials for his research related to complex aortic repair hemodynamics (blood flow). Dr. Tran also coauthored a chapter in the book Complications in Endovascular Surgery.
