Ihab Hajjar, M.D. Titles and Appointments Professor Endowed Title Pogue Family Distinguished Chair in Alzheimer's Disease Clinical Research and Care, in Memory of Maurine and David Weigers McMullan; Pogue Family Distinguished University Chair in Alzheimer's Disease Clinical Research and Care, in Memory of Maurine and David Weigers McMullan School Medical School Department Neurology | Internal Medicine | Peter O'Donnell Jr. Brain Institute You have reached the Academic Profile. For more information on the doctor and patient care, please visit the clinical profile. Biography Joined UT Southwestern: 2022 Clinical Interests: Ihab Hajjar, M.D., holds a joint appointment in the Department of Neurology and the Department of Internal Medicine at UT Southwestern Medical Center. He specializes in geriatric medicine, Alzheimer's disease, and hypertension. Research: Dr. Hajjar leads the Heart-Brain Connection (HBC) Program, a groundbreaking interdisciplinary initiative dedicated to advancing our knowledge of cognitive aging and dementia, including Alzheimer's disease. The lab's primary objectives are to uncover the underlying mechanisms driving cognitive impairments, identify novel therapeutic targets for cognitive disorders, and explore innovative approaches to improve the care provided to older adults facing cognitive challenges. Background: Dr. Hajjar earned his medical degree at the American University of Beirut in Lebanon. He completed internal medicine residency training at the Cleveland Clinic Foundation in Ohio and gained advanced training through a fellowship in geriatric medicine and dementia at the Medical College of Wisconsin in Milwaukee. He is certified by the American Board of Internal Medicine in geriatric medicine and internal medicine. Prior to UT Southwestern, Dr. Hajjar served as Medical Director of Integrated Memory Coordinated Care, Director of the Dementia Fellowship, and Co-Director of the Clinical Core and Research Education Component at the Goizueta Alzheimer’s Disease Research Center at Emory University. Education Medical School American University of Beirut Faculty of Medicine, Lebanon (1994) Internship American University of Beirut Faculty of Medicine, Lebanon (1995), Internal Medicine Residency Cleveland Clinic Foundation (1998), Internal Medicine Fellowship Medical College of Wisconsin (2000), Geriatrics Publications Serum Neurofilament Light-Chain Levels in Essential Tremor: A Replication Study Louis ED, Sharma VD, Hajjar I, Hernandez N Neurodegenerative Diseases 2025 Mar 24 141-147 Correction to: APOE4 impairs myelination via cholesterol dysregulation in oligodendrocytes (Nature, (2022), 611, 7937, (769-779), 10.1038/s41586-022-05439-w) Blanchard JW, Akay LA, Davila-Velderrain J, von Maydell D, Mathys H, Davidson SM, Effenberger A, Chen CY, Maner-Smith K, Hajjar I, Ortlund EA, Bula M, Agbas E, Ng A, Jiang X, Kahn M, Blanco-Duque C, Lavoie N, Liu L, Reyes R, Lin YT, Ko T, R’Bibo L, Ralvenius WT, Bennett DA, Cam HP, Kellis M, Tsai LH Nature 2024 Dec 636 E9 Clinical Manifestations Walker TA, Elchommali J, Han JE, Truong A, Hajjar I, Goldstein F Alzheimer's and Dementia 2024 Dec 20 e089637 Technology literacy and access to digital resources for remote assessment among adults enrolled in Alzheimer's disease research Okafor M, Yang Z, Vickers KL, Sanders K, Simama N, Hewitt KC, Lah J, Levey AI, Goldstein FC, Hajjar I Journal of Alzheimer's disease : JAD 2024 Dec 102 1286-1296 Associations Between High-Density Lipoprotein Cholesterol Efflux and Brain Grey Matter Volume Giacona JM, Wang J, Zhang R, Kelley B, Hajjar I, Thomas BP, Yu FF, De Lemos JA, Rohatgi AK, Vongpatanasin W Journal of Clinical Medicine 2024 Oct 13 Associations Between High-Density Lipoprotein Cholesterol Efflux and Brain Grey Matter Volume Giacona JM, Wang J, Zhang R, Kelley BJ, Hajjar I, Thomas BP, Yu FF, de Lemos JA, Rohatgi A, Vongpatanasin W Journal of Clinical Medicine 2024 Oct 13 High-Sensitivity Troponin T, NT-proBNP, and Cognitive Outcomes in SPRINT Haney D, Ma Y, Dalmacy D, Pajewski NM, Hajjar I, De Lemos JA, Zhang W, Soliman EZ, Ballantyne CM, Nambi V, Sattar N, Killeen AA, Ix JH, Shlipak MG, Berry JD, Ascher SB Hypertension 2024 Sep 81 1956-1965 Lower Prevalence of Asymptomatic Alzheimer's Disease Among Healthy African Americans Lah JJ, Tian G, Risk BB, Hanfelt JJ, Wang L, Zhao L, Hales CM, Johnson EC, Elmor MB, Malakauskas SJ, Heilman C, Wingo TS, Dorbin CD, Davis CP, Thomas TI, Hajjar IM, Levey AI, Parker MW Annals of Neurology 2024 Sep 96 463-475 Characterization of African-American Super-Agers in the National Alzheimer's Coordinating Center cohort Trammell AR, Goldstein FC, Parker MW, Hajjar IM Journal of the American Geriatrics Society 2024 Jul 72 1995-2005 Contribution of Peripheral Microvascular Dysfunction to Mild Cognitive Impairment Gold ME, Rogers SC, Kulshreshtha A, Chen Y, Ko YA, Cheng ML, Gold DA, Vatsa N, Jain V, Desai S, Moazzami K, Thomas T, Okafor M, Goldstein F, Lah J, Quyyumi AA, Hajjar I American Journal of Cardiology 2024 May 218 4-6 Results 1-10 of 126 1 2 3 4 5 Next Last Professional Associations/Affiliations Alzheimer's Clinical Trials Consortium American Geriatrics Society (Fellow) American Medical Association American Society of Hypertension International Society to Advance Alzheimer's Research and Treatment Society of Geriatric Cardiology (Fellow)
