Dr Daniel Obaid
Clinical Associate Professor - Consultant Cardiologist
Room: Office - 510
Fifth Floor
Institute of Life Science 2
Singleton Campus

Dr Daniel R Obaid qualified in medicine from the University of Cambridge in 2001 and completed specialist training in cardiology at the Wales Deanery. He was a British Heart Foundation Clinical Training Research Fellow at the Royal Papworth Hospital and the University of Cambridge (2009-2012) where he completed a PhD using invasive and non-invasive imaging to identify vulnerable atherosclerotic plaque, work that led to the award of the Young Investigator Prize at the Society of Cardiovascular CT, USA.

Currently he is a clinical academic working as an honorary consultant interventional cardiologist at the Morriston Regional Cardiac Centre and a clinical associate professor based at the clinical imaging facility in the ILS 2.

Areas of Expertise

  • Interventional Cardiology
  • Cardiac Computed Tomography
  • Intravascular Imaging
  • Atherosclerotic Plaque Imaging
  • Human Factors and Patient Safety


  1. Dorman, S., Obaid, D. Vascular access and closure for cardiovascular intervention Heart 105 16 1279 1288
  2. Richards, C., Obaid, D. Low-Dose Radiation Advances in Coronary Computed Tomography Angiography in the Diagnosis of Coronary Artery Disease Current Cardiology Reviews 15 4 304 315
  3. Richards, C., Dorman, S., John, P., Davies, A., Evans, S., Ninan, T., Martin, D., Kannoly, S., Roberts-Davies, G., Ramsey, M., Obaid, D. Low-radiation and high image quality coronary computed tomography angiography in “real-world” unselected patients World Journal of Radiology 10 10 135 142
  4. Obaid, D., Smith, D., Gilbert, M., Ashraf, S., Chase, A. Computer simulated “Virtual TAVR” to guide TAVR in the presence of a previous Starr-Edwards mitral prosthesis Journal of Cardiovascular Computed Tomography
  5. Elangovan, S., Chase, A., Ionescu, A., Obaid, D. Overcoming Difficult Radial Anatomy During Primary PCI With Balloon-Assisted Tracking Cardiac Interventions Today
  6. Obaid, D., Calvert, P., Bennett, M., West, N. High-Risk Atherosclerotic Plaque in Aberrant Circumflex Coronary Artery Journal of Invasive Cardiology 30 3 E26
  7. Obaid, D., Calvert, P., Brown, A., Gopalan, D., West, N., Rudd, J., Bennett, M. Coronary CT angiography features of ruptured and high-risk atherosclerotic plaques: Correlation with intra-vascular ultrasound Journal of Cardiovascular Computed Tomography 11 6 455 461
  8. Obaid, D., Hailan, A., Chase, A., Dorman, S., Jenkins, G., Raybould, A., Ramsey, M., Thomas, P., Smith, D., Ionescu, A. Balloon-Assisted Tracking Use Reduces Radial Artery Access Failure in an Experienced Radial Center and is Feasible During Primary PCI for STEMI. Journal of Invasive Cardiology 29 7 219 224
  9. Calvert, P., Brown, A., Hoole, S., Obaid, D., West, N., Bennett, M. Geographical miss is associated with vulnerable plaque and increased major adverse cardiovascular events in patients with myocardial infarction Catheterization and Cardiovascular Interventions 88 3 340 347
  10. Brown, A., Teng, Z., Calvert, P., Rajani, N., Hennessy, O., Nerlekar, N., Obaid, D., Costopoulos, C., Huang, Y., Hoole, S., Goddard, M., West, N., Gillard, J., Bennett, M. Plaque Structural Stress Estimations Improve Prediction of Future Major Adverse Cardiovascular Events After Intracoronary ImagingCLINICAL PERSPECTIVE Circulation: Cardiovascular Imaging 9 6 e004172
  11. Brown, A., Obaid, D., West, N., Goddard, M., Bennett, M. Cholesterol crystals identified using optical coherence tomography and virtual histology intravascular ultrasound EuroIntervention 11 2 e1 e1
  12. Brown, A., Obaid, D., Costopoulos, C., Parker, R., Calvert, P., Teng, Z., Hoole, S., Goddard, M., Bennett, M. Direct Comparison of Virtual-Histology Intravascular Ultrasound and Optical Coherence Tomography Imaging for Identification of Thin-Cap Fibroatheroma. Circulation: Cardiovascular Imaging 8 10
  13. Obaid, D., Dorman, S., Chase, A., Smith, D. Macrochannel recanalisation of the right coronary artery visualised with three-dimensional optical frequency domain imaging EuroIntervention 11 8 e1 e1
  14. Obaid, D., Calvert, P., Gopalan, D., Parker, R., West, N., Goddard, M., Rudd, J., Bennett, M. Dual-energy computed tomography imaging to determine atherosclerotic plaque composition: A prospective study with tissue validation Journal of Cardiovascular Computed Tomography 8 3 230 237
  15. Teng, Z., Brown, A., Calvert, P., Parker, R., Obaid, D., Huang, Y., Hoole, S., West, N., Gillard, J., Bennett, M., Obaid, D. Coronary Plaque Structural Stress Is Associated With Plaque Composition and Subtype and Higher in Acute Coronary Syndrome: The BEACON I (Biomechanical Evaluation of Atheromatous Coronary Arteries) Study Circulation: Cardiovascular Imaging 7 3 461 470
  16. Hailan, A., Obaid, D., Zaidi, A., Smith, D., Obaid, D. Anomalous origin of left internal mammary artery arising directly from the aortic arch Case Reports 2014 dec03 1 bcr2014206583 bcr2014206583
  17. Obaid, D., Calvert, P., Gopalan, D., Parker, R., Hoole, S., West, N., Goddard, M., Rudd, J., Bennett, M., Obaid, D. Atherosclerotic Plaque Composition and Classification Identified by Coronary Computed Tomography: Assessment of Computed Tomography-Generated Plaque Maps Compared With Virtual Histology Intravascular Ultrasound and Histology Circulation: Cardiovascular Imaging 6 5 655 664
  18. Yu, E., Calvert, P., Mercer, J., Harrison, J., Baker, L., Figg, N., Kumar, S., Wang, J., Hurst, L., Obaid, D., Logan, A., West, N., Clarke, M., Vidal-Puig, A., Murphy, M., Bennett, M., Obaid, D. Mitochondrial DNA Damage Can Promote Atherosclerosis Independently of Reactive Oxygen Species Through Effects on Smooth Muscle Cells and Monocytes and Correlates With Higher-Risk Plaques in Humans Circulation 128 7 702 712
  19. Obaid, D., Youhana, A., Chase, A. Giant Coronary Aneurysms with Associated Aneurysm of the Ascending Aorta Journal of Cardiac Surgery 28 5 567 568
  20. Obaid, D., Calvert, P., McNab, D., West, N., Bennett, M., Obaid, D. Identification of Coronary Plaque Sub-Types Using Virtual Histology Intravascular Ultrasound Is Affected by Inter-Observer Variability and Differences in Plaque Definitions Circulation: Cardiovascular Imaging 5 1 86 93
  21. Calvert, P., Obaid, D., Bennett, M. Identification of the Vulnerable Plaque – does VH-IVUS have the answer? Cardiology News 15 2
  22. Calvert, P., Obaid, D., O'Sullivan, M., Shapiro, L., McNab, D., Densem, C., Schofield, P., Braganza, D., Clarke, S., Ray, K., West, N., Bennett, M. Association Between IVUS Findings and Adverse Outcomes in Patients With Coronary Artery Disease JACC: Cardiovascular Imaging 4 8 894 901
  23. Calvert, P., Liew, T., Gorenne, I., Clarke, M., Costopoulos, C., Obaid, D., O'Sullivan, M., Shapiro, L., McNab, D., Densem, C., Schofield, P., Braganza, D., Clarke, S., Ray, K., West, N., Bennett, M., Obaid, D. Leukocyte Telomere Length Is Associated With High-Risk Plaques on Virtual Histology Intravascular Ultrasound and Increased Proinflammatory Activity Arteriosclerosis, Thrombosis, and Vascular Biology 31 9 2157 2164
  24. Obaid, D., Amerasekera, S. The role of peripherally inserted central venous catheters in CCU. British Journal of Cardiac Nursing 6 8
  25. Calvert, P., Obaid, D., McCormick, L. Balloon valvuloplasty for the treatment of valvular stenosis (Ed.), Minimally invasive techniques for the treatment of patients with structural heart disease. Bentham Books

See more...


  • PM-266 The Cardiovascular System

    Leading on from the first year Human Physiology Module (PM-139), the Cardiovascular Module will introduce and define the fundamental cellular mechanisms that regulate the physiology of healthy cardiovascular function. The Module will describe the processes that allow regular heartbeat and blood vessel function and how perturbations in the systems covered may lead to pathophysiological conditions. There will be an emphasis on experimental approaches used to study the cardiovascular mechanisms described.

  • PM-266C Y System Gardiofasgwlaidd

    Gan adeiladu ar fodiwl y flwyddyn gyntaf, Ffisioleg Ddynol (PM-139), bydd y modiwl ar y System Gardiofasgwlaidd yn cyflwyno ac yn diffinio'r mecanweithiau cellol sylfaenol sy'n rheoli ffisioleg gweithrediad system gardiofasgwlaidd iach. Bydd y modiwl yn disgrifio'r prosesau sy'n gyfrifol am guriad calon rheolaidd a gweithrediad y pibellau gwaed, a sut gall newidiadau yn y systemau dan sylw arwain at gyflyrau pathoffisiolegol. Bydd pwyslais ar y dulliau arbrofol a ddefnyddir i astudio'r mecanweithiau cardiofasgwlaidd a ddisgrifiwyd.



    Other supervisor: Dr Sarah Prior
    Other supervisor: Prof Jeffrey Stephens

Research Groups

  • Co-coordinator

    The ICER Forum is an initiative to narrow the gap between cardiovascular, biomedical research and clinical practice. The aim of the ICER Forum is to encourage collaboration and facilitate the transfer of knowledge between academics and cardiovascular clinicians in Wales.

Administrative Responsibilities

  • Research and Development lead for Cardiology - Morriston Hospital

    2018 - Present

  • Lead for the Academic Core Medical Training Program - Academic Core Medical Training Swansea University Medical School

    2018 - Present