Warren Gasper, MD

TitleAssistant Professor
SchoolUCSF School of Medicine
Address400 Parnassus Ave, UC Clinics
San Francisco CA 94158
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    Collapse Education and Training
    University of California, San FranciscoVascular Surgeyr Fellowship2013School of Medicine
    University of California, San FranciscoGeneral Surgery Residency2010School of Medicine
    Univeristy of Maryland, BaltimoreM.D.2003School of Medicine

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    My current research interests fall broadly into the categories of vein / vein graft physiology and advanced endovascular aneurysm therapies. Over the past 4 years I have been working with Dr Michael Conte and Dr Christopher Owens in the UCSF Division of Vascular and Endovascular Surgery on several projects involving vein graft physiology, which have lead to several presentations at national meetings as well as publications. We have found that after lower extremity bypass surgery most luminal dilation occurs early (30 days) and is typically complete by 3 months. However, the response is not uniform and it appears that a mixture of local factors (e.g. vein diameter and quality), biologic factors (e.g. preoperative hsCRP levels) and systemic factors (e.g. race, indication for bypass surgery) are involved in the remodeling response.
    My second major area of research interest is advanced endovascular therapies for aortic aneurysms. The development and widespread adoption of endovascular stent-grafts for infrarenal aortic aneurysms and thoracic aortic aneurysms have dramatically reduced the physiologic demands, complication rates and length of hospitalization for patients undergoing infrarenal or thoracic aortic aneurysm repairs compared to open techniques. However, aneurysms of thoracoabdominal, paravisceral and/or pararenal aorta require even more demanding operations with a higher rate of complications and longer hospitalizations. For the past 4 years I have worked with Dr. Timothy Chuter and Dr. Linda Reilly in the UCSF Division of Vascular and Endovascular Surgery to develop the multi-branched endovascular thoracoabdominal aneurysm repair technique. The technique is being studied under an FDA IDE in a CHR-approved study at UCSF and the San Francisco VA. As the co-principal investigator, I am responsible for overseeing the regulatory and subject care activities for the study at the San Francisco VA. This work has included consultations in the outpatient clinic, planning and performing the multi-branched endovascular repairs and analyzing the results of the study.

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Hiramoto JS, Fernandez C, Gasper W, Vartanian S, Reilly L, Chuter T. Lower extremity weakness is associated with elevated blood and cerebrospinal fluid glucose levels following multibranched endovascular aortic aneurysm repair. J Vasc Surg. 2016 Nov 19. PMID: 27876524.
      View in: PubMed
    2. Ramanan B, Ahmed A, Wu B, Causey MW, Gasper W, Vartanian SM, Hiramoto JS, Conte MS. Determinants of Midterm Functional Outcomes and Wound Healing in a Hospital-Based Limb Preservation Program. J Vasc Surg. 2016 Aug; 64(2):546-547. PMID: 27763301.
      View in: PubMed
    3. Causey MW, Ahmed A, Wu B, Gasper W, Reyzelman A, Vartanian SM, Hiramoto JS, Conte MS. Society for Vascular Surgery limb stage and patient risk correlate with outcomes in an amputation prevention program. J Vasc Surg. 2016 Jun; 63(6):1563-1573.e2. PMID: 27036309.
      View in: PubMed
    4. Grenon SM, Owens CD, Alley H, Perez S, Whooley MA, Neylan TC, Aschbacher K, Gasper W, Hilton JF, Cohen BE. Posttraumatic Stress Disorder Is Associated With Worse Endothelial Function Among Veterans. J Am Heart Assoc. 2016; 5(3). PMID: 27009621.
      View in: PubMed
    5. Fernandez CC, Sobel JD, Gasper W, Vartanian SM, Reilly LM, Chuter TA, Hiramoto JS. Standard off-the-shelf versus custom-made multibranched thoracoabdominal aortic stent grafts. J Vasc Surg. 2016 May; 63(5):1208-15. PMID: 26817612.
      View in: PubMed
    6. Zhu C, Haraldsson H, Faraji F, Owens C, Gasper W, Ahn S, Liu J, Laub G, Hope MD, Saloner D. Isotropic 3D black blood MRI of abdominal aortic aneurysm wall and intraluminal thrombus. Magn Reson Imaging. 2016 Jan; 34(1):18-25. PMID: 26471514.
      View in: PubMed
    7. Hope MD, Gasper W, Rapp J, Owens CD, Haraldsson H, Saloner D. Vascular inflammation in a growing iliac artery aneurysm. Clin Nucl Med. 2015 Jun; 40(6):e323-4. PMID: 25674872.
      View in: PubMed
    8. Han SM, Gasper W, Chuter TA. Endovascular rescue after inadvertent false lumen stent graft implantation. J Vasc Surg. 2016 Feb; 63(2):518-22. PMID: 25595403.
      View in: PubMed
    9. Sobel JD, Vartanian SM, Gasper W, Hiramoto JS, Chuter TA, Reilly LM. Lower extremity weakness after endovascular aneurysm repair with multibranched thoracoabdominal stent grafts. J Vasc Surg. 2015 Mar; 61(3):623-8. PMID: 25457458.
      View in: PubMed
    10. Alley H, Owens CD, Gasper W, Grenon SM. Ultrasound assessment of endothelial-dependent flow-mediated vasodilation of the brachial artery in clinical research. J Vis Exp. 2014; (92):e52070. PMID: 25406739; PMCID: PMC4353419.
    11. Chong KC, Owens CD, Park M, Alley HF, Boscardin WJ, Conte MS, Gasper W, Grenon SM. Relationship between kidney disease and endothelial function in peripheral artery disease. J Vasc Surg. 2014 Dec; 60(6):1605-11. PMID: 25441679; PMCID: PMC4254442 [Available on 12/01/15].
    12. Walker JP, Nosova E, Sigovan M, Rapp J, Grenon MS, Owens CD, Gasper W, Saloner DA. Ferumoxytol-enhanced magnetic resonance angiography is a feasible method for the clinical evaluation of lower extremity arterial disease. Ann Vasc Surg. 2015 Jan; 29(1):63-8. PMID: 25269682.
      View in: PubMed
    13. Walker JP, Hiramoto JS, Gasper W, Auyang P, Conte MS, Rapp JH, Lovett DH, Owens CD. Vitamin D deficiency is associated with mortality and adverse vascular access outcomes in patients with end-stage renal disease. J Vasc Surg. 2014 Jul; 60(1):176-83. PMID: 24582700; PMCID: PMC4074433.
    14. Owens CD, Gasper W, Walker JP, Alley HF, Conte MS, Grenon SM. Safety and feasibility of adjunctive dexamethasone infusion into the adventitia of the femoropopliteal artery following endovascular revascularization. J Vasc Surg. 2014 Apr; 59(4):1016-24. PMID: 24423476; PMCID: PMC4391811.
    15. Grenon SM, Chong K, Alley H, Nosova E, Gasper W, Hiramoto J, Boscardin WJ, Owens CD. Walking disability in patients with peripheral artery disease is associated with arterial endothelial function. J Vasc Surg. 2014 Apr; 59(4):1025-34. PMID: 24423479; PMCID: PMC3966931.
    16. Gasper W, Jimenez CA, Walker J, Conte MS, Seward K, Owens CD. Adventitial nab-rapamycin injection reduces porcine femoral artery luminal stenosis induced by balloon angioplasty via inhibition of medial proliferation and adventitial inflammation. Circ Cardiovasc Interv. 2013 Dec; 6(6):701-9. PMID: 24221390; PMCID: PMC3888086.
    17. Owens CD, Gasper W, Rahman AS, Conte MS. Vein graft failure. J Vasc Surg. 2015 Jan; 61(1):203-16. PMID: 24095042; PMCID: PMC4391818 [Available on 01/01/16].
    18. Gasper W, Reilly LM, Rapp JH, Grenon SM, Hiramoto JS, Sobel JD, Chuter TA. Assessing the anatomic applicability of the multibranched endovascular repair of thoracoabdominal aortic aneurysm technique. J Vasc Surg. 2013 Jun; 57(6):1553-8; discussion 1558. PMID: 23395201.
      View in: PubMed
    19. Conte MS, Owens CD, Belkin M, Creager MA, Edwards KL, Gasper W, Kenagy RD, LeBoeuf RC, Sobel M, Clowes A. A single nucleotide polymorphism in the p27(Kip1) gene is associated with primary patency of lower extremity vein bypass grafts. J Vasc Surg. 2013 May; 57(5):1179-85.e1-2. PMID: 23312942; PMCID: PMC3644510.
    20. Sigovan M, Rayz V, Gasper W, Alley HF, Owens CD, Saloner D. Vascular remodeling in autogenous arterio-venous fistulas by MRI and CFD. Ann Biomed Eng. 2013 Apr; 41(4):657-68. PMID: 23188560; PMCID: PMC3606670.
    21. Gasper W, Owens CD, Kim JM, Hills N, Belkin M, Creager MA, Conte MS. Thirty-day vein remodeling is predictive of midterm graft patency after lower extremity bypass. J Vasc Surg. 2013 Jan; 57(1):9-18. PMID: 22960020; PMCID: PMC3529790.
    22. Sigovan M, Gasper W, Alley HF, Owens CD, Saloner D. USPIO-enhanced MR angiography of arteriovenous fistulas in patients with renal failure. Radiology. 2012 Nov; 265(2):584-90. PMID: 22875796; PMCID: PMC3480811.
    23. Owens CD, Kim JM, Hevelone ND, Gasper W, Belkin M, Creager MA, Conte MS. An integrated biochemical prediction model of all-cause mortality in patients undergoing lower extremity bypass surgery for advanced peripheral artery disease. J Vasc Surg. 2012 Sep; 56(3):686-95. PMID: 22554422; PMCID: PMC3413780.
    24. Gasper W, Runge SJ, Owens CD. Management of infrapopliteal peripheral arterial occlusive disease. Curr Treat Options Cardiovasc Med. 2012 Apr; 14(2):136-48. PMID: 22249766.
      View in: PubMed
    25. Dubin R, Owens C, Gasper W, Ganz P, Johansen K. Associations of endothelial dysfunction and arterial stiffness with intradialytic hypotension and hypertension. Hemodial Int. 2011 Jul; 15(3):350-8. PMID: 21658174; PMCID: PMC3143472.
    26. Owens CD, Gasper W, Conte MS. Assessing drug elution technologies in the superficial femoral artery. Panminerva Med. 2011 Mar; 53(1):37-49. PMID: 21346703.
      View in: PubMed
    27. Roll GR, Ma S, Gasper W, Patti M, Way LW, Carter J. Excellent outcomes of laparoscopic esophagomyotomy for achalasia in patients older than 60 years of age. Surg Endosc. 2010 Oct; 24(10):2562-6. PMID: 20361213; PMCID: PMC2945469.
    28. Gasper W, Glidden DV, Jin C, Way LW, Patti MG. Has recognition of the relationship between mortality rates and hospital volume for major cancer surgery in California made a difference?: A follow-up analysis of another decade. Ann Surg. 2009 Sep; 250(3):472-83. PMID: 19730178.
      View in: PubMed
    29. Patti MG, Gasper W, Fisichella PM, Nipomnick I, Palazzo F. Gastroesophageal reflux disease and connective tissue disorders: pathophysiology and implications for treatment. J Gastrointest Surg. 2008 Nov; 12(11):1900-6. PMID: 18766408.
      View in: PubMed
    30. Jancelewicz T, Vu LT, Shawo AE, Yeh B, Gasper W, Harris HW. Predicting strangulated small bowel obstruction: an old problem revisited. J Gastrointest Surg. 2009 Jan; 13(1):93-9. PMID: 18685902.
      View in: PubMed
    31. Imhof I, Gasper W, Derynck R. Association of tetraspanin CD9 with transmembrane TGF{alpha} confers alterations in cell-surface presentation of TGF{alpha} and cytoskeletal organization. J Cell Sci. 2008 Jul 1; 121(Pt 13):2265-74. PMID: 18544636.
      View in: PubMed
    32. Gasper W, Sweet MP, Golden JA, Hoopes C, Leard LE, Kleinhenz ME, Hays SR, Patti MG. Lung transplantation in patients with connective tissue disorders and esophageal dysmotility. Dis Esophagus. 2008; 21(7):650-5. PMID: 18459990.
      View in: PubMed
    33. Gasper W, Jamshidi R, Theodore PR. Palliation of thoracic malignancies. Surg Oncol. 2007 Dec; 16(4):259-65. PMID: 17904357.
      View in: PubMed
    34. Sweet MP, Nipomnick I, Gasper W, Bagatelos K, Ostroff JW, Fisichella PM, Way LW, Patti MG. The outcome of laparoscopic Heller myotomy for achalasia is not influenced by the degree of esophageal dilatation. J Gastrointest Surg. 2008 Jan; 12(1):159-65. PMID: 17710504.
      View in: PubMed
    35. Gasper W, Sweet MP, Hoopes C, Leard LE, Kleinhenz ME, Hays SR, Golden JA, Patti MG. Antireflux surgery for patients with end-stage lung disease before and after lung transplantation. Surg Endosc. 2008 Feb; 22(2):495-500. PMID: 17704875.
      View in: PubMed
    36. Zhang L, Gasper W, Stass SA, Ioffe OB, Davis MA, Mixson AJ. Angiogenic inhibition mediated by a DNAzyme that targets vascular endothelial growth factor receptor 2. Cancer Res. 2002 Oct 1; 62(19):5463-9. PMID: 12359754.
      View in: PubMed
    37. Chen QR, Zhang L, Gasper W, Mixson AJ. Targeting tumor angiogenesis with gene therapy. Mol Genet Metab. 2001 Sep-Oct; 74(1-2):120-7. PMID: 11592809.
      View in: PubMed
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