The Calgary Thoracic Aortic Team is led by Dr Jehangir Appoo and Dr Eric Herget.


Our team is made up of surgeons, physicians and specialist radiologists and work together to diagnose, screen and treat patients who have a disease of the aorta.

Dr. Jehangir Appoo

Clinical Associate Professor

Cardiac Surgeon

Dr. Appoo completed his B.Sc. in Biochemistry in 1993 from McGill University, Montreal Que., and his Doctorate of Medicine (MDCM) in 1997, from McGill University. This was followed by Cardiac Surgery training at the University of Alberta in Edmonton and in 2003 he became a Fellow of the Royal College of Surgeons of Canada (FRCSC). Following his certification in Cardiac Surgery, he pursued a fellowship in Advanced Adult Cardiac Surgery at the Royal Brompton Hospital in London, England (2003-2004). After a year in Europe, he did a second fellowship, at the University of Pennsylvania in Philadelphia, Pa. While at UPENN (2004-2005), he acquired specialized training in Thoracic Aortic Surgery, Endovascular Aortic Stent Grafting and Heart Failure Surgery. Since joining the Libin Cardiovascular Institute of Alberta, Dr. Appoo has established new clinical programs in the areas of thoracic aortic surgery and mechanical cardiac support. In 2006, he implanted the first left ventricular assist device in Southern Alberta.

Research Interests:

Chronic and Acute thoracic aortic pathology, including:

  • aneurysmal disease
  • aortic coarctation
  • aortic dissection
  • traumatic aortic injury
  • bicuspid aortic valve syndrome
  • aortic pathology with Marfan’s disease

He also has a special interest in Thoracic EndoVascular Aortic Repair (TEVAR) – a “minimally invasive” approach to treat complex aortic pathology. A list of Dr. Appoo’s publications.

Dr Eric Herget

Dr. Eric Herget

Clinical Associate Professor

Interventional Radiologist

Dr. Herget completed a B.Sc. in Conservation Biology at Brigham Young University in Provo, Utah in 1996 and earned his medical degree from the University of Calgary in 1999. He completed his residency in Diagnostic Radiology in 2004 at the University of British Columbia in Vancouver. Dr. Herget then completed both a fellowship in Interventional Radiology and a mini-fellowship in cardiac CTA at Stanford University in Palo Alto, California in 2005. Dr. Herget joined EFW Radiology in 2005 as an interventional radiologist and since that time has worked closely with Dr. Appoo in establishing the thoracic aortic program at the University of Calgary. Dr. Herget also was involved with establishing the Cardiac CTA program at the University of Calgary. For the past several years Dr. Herget has also served on the board of directors for the EFW Radiology partnership. Dr. Herget has a special clinical and research interest in both the imaging surveillance and endovascular management of thoracic aortic pathologies. A list of Dr. Herget’s publications.
MBristow - photo

Dr. Michael Bristow

Clinical Associate Professor

Cardiothoracic Radiologist

Dr. Bristow initially completed a joint B.Sc./B.A. program in Geomatics Engineering and Spanish at the University of Calgary (1999). After working as an engineer for a few years, he decided to pursue his interest in the biomedical field and earned a M.Sc. in Biomedical Engineering at the U of C (2005), at which time he focused on image post-processing of MRI. He obtained a M.D. from the U of C (2008) and subsequently did his residency training in Radiology at the U of C (2013). He received further sub-specialty training in Cardiovascular and Thoracic Imaging at Stanford University (2014.) Dr. Bristow is now a Clinical Assistant Professor in the Departments of Radiology and Cardiac Sciences at the University of Calgary and works as a cardiothoracic radiologist with EFW Radiology. Dr. Bristow is particularly interested in applying new technologies to clinical practice in the area of cardiovascular imaging and has a special interest in 4D Flow imaging.

Dr. Amy Bromley

Clinical Associate Professor


Dr. Bromley completed her B.Sc (hons) in Biochemistry and Microbiology from Dalhousie University in 2003, and her Doctor of Medicine in 2007, from Memorial University of Newfoundland.  She went on to complete residency training in Anatomic Pathology at the University of Calgary, and became a Fellow of the Royal College of Physicians of Canada in 2012.  Since that time, Dr. Bromley has been an anatomic pathologist at Calgary Laboratory Services, which provides medical laboratory services to the Calgary Zone. As a pathologist, Dr. Bromley investigates the microscopic makeup of the specimens removed at surgery.  By evaluating the different components, the underlying pathophysiology of a disease can be better understood, which ultimately may make treatment of the disease more specific, and hopefully more successful, in the future. Dr. Bromley’s other interests include the role of autopsy in modern medicine, particularly as it pertains to evaluating new treatments and surgical techniques for patient safety and quality assurance.

Dr. Elena Di Martino

Associate Professor

Department: Civil Engineering, Centre for Bioengineering Research and Education

Dr. Elena Di Martino graduated in Engineering from the Politecnico of Milano with a combined B.S/M.S. degree in 1993 and obtained her Ph.D. from the University of Milano in 1999. Her fascination for cardiovascular mechanics dates back to her M.S. work at Politecnico of Milano where she designed a new polymer-based cardiac heart valve. During her PhD studies and postdoctoral appointment at the University of Pittsburgh, she gained invaluable experience on abdominal aneurysms through direct observation in the operating room. In September 2004 Dr. Di Martino was appointed as Research Scientist at Carnegie Mellon University in Pittsburgh. In that capacity, she participated in a study of stress-mediated atrial remodeling being conducted at the University of Pittsburgh Medical Center. These experiences spurred her interest in understanding how mechanical and structural changes affect vascular pathology. Since July 2007, Dr. Di Martino is an Assistant Professor in the Department of Civil Engineering and Centre of Bioengineering Research and Education at the University of Calgary.

Research Interests:
  • Cardiovascular biomechanics
  • Abdominal aortic aneurysms
  • Mechanics of the left atrium
  • Organ and tissue michanobiology: linking mechanics to cardiovascular pathologies
  • Biosolid mechanics
  • Biological tissue testing
  • Medical imaging
  • Multi-physics computational methods

A list of Dr. Di Martino’s publications


Dr. Alexander Gregory

Clinical Director, Aortic Anaesthesia and Co-Director Basic Science Aortic Research

Cardiovascular Anaesthesiologist

Alexander John Gregory MD, FRCPC is an anaesthesiologist and clinical assistant professor at the University of Calgary. His undergraduate degree is a BSc (honours), having majored in neurobiology and behaviour at CornellUniversity. He then attended medical school and completed his anesthesiology residency at the University of Calgary. Following this he spent one year in Philadelphia where he obtained fellowship training in cardiothoracic anaesthesiology at the University of Pennsylvania. Currently a member of the Department of Anesthesia at the Foothills Medical Centre, Dr. Gregory provides care for both cardiac and non-cardiac patients. His current areas of interest include: aortic physiology and disease, spinal cord ischemia, neuroprotection in cardiac surgery and congestive hepatopathy. A list of Dr. Gregory’s publications.
Vamshi new image

Dr. Vamshi Kotha

Clinical Associate Professor

Interventional Radiologist

Dr. Kotha completed his medical schooling and residency in Radiology at the Goa Medical College, India and then went on to complete a Fellowship in Cardiovascular Imaging at the St. Michael’s Hospital, University of Toronto and a Fellowship in Interventional Radiology at the Foothills Medical Centre, University of Calgary. He is currently a Staff Interventional Radiologist with EFW Radiology at the Foothills Medical Centre. With his unique training in vascular imaging and intervention, Dr. Kotha has become an integral part of the thoracic aortic program at the University of Calgary. Dr. Kotha has special clinical and research interests in the imaging and hybrid/endovascular treatment of thoracic aortic pathologies in addition to imaging of the aortic root and cardiac implants. He is currently involved in several research studies in these fields. A list of Dr. Kotha’s publications. A list of Dr. Kotha’s publications.
Carmen Lydell

Dr. Carmen Lydell

Clinical Associate Professor


Dr. Carmen Lydell is a Clinical Assistant Professor in the Department of Diagnostic Imaging and Cardiac Sciences in the Faculty of Medicine at University of Calgary. Dr. Lydell obtained her medical degree from the University of British Columbia and moved on to complete her Radiology training residency at the University of Calgary. Dr. Lydell then completed a clinical Fellowship in Cardiothoracic Imaging at the department of Radiology at the University of California, San Francisco. She returned to Calgary in 2009 to join the Department of Diagnostic Imaging at the University of Calgary where her focus is Cardiac CT, MRI and Chest imaging. Dr. Lydell is currently the Director of Cardiac imaging for DI and the Clinical Co-director of cardiac MRI and cardiac CT in the Stephenson Advanced Cardiac Imaging Centre. Dr. Lydell’s research interests include novel clinical applications of CT and MRI for cardiac and aortic imaging, and evaluating the long-term clinical impact of using MRI and CT imaging in the management of cardiovascular disease.
“Dr McClure

Dr. Scott McClure

Clinical Associate Professor

Cardiac Surgeon

Dr. McClure is the newest member of the Calgary Thoracic Aortic Team. Dr. McClure completed his Bachelor of Arts (Cum Laude) at Lake Forest College in Lake Forest, Illinois (2001) and received his Doctorate of Medicine from the University of Calgary (2004). He completed his cardiac surgery residency training at Western University in London, Ontario (2011). A Fellow of the Royal College of Surgeons of Canada (FRCSC) with certification in cardiac surgery since 2011, Dr. McClure went on to complete 2-years of additional fellowship training in cardiac surgery. He first undertook a 1-year fellowship in Advance Adult Cardiac Surgery at Harvard University, Brigham and Women’s Hospital in Boston, Massachusetts (2011-2012). This was followed by a 1-year fellowship in Thoracic Aortic Surgery, acquiring specialized skills in the surgical and endovascular management of thoracic aortic disease at the University of Pennsylvania in Philadelphia, Pennsylvania (2012-2013). Prior to joining the Calgary Thoracic Aortic team at the Foothills Medical Centre, Dr. McClure was an Assistant Professor and staff cardiac surgeon at Queen’s University in Kingston, Ontario (2013-2015). Dr. McClure has a focused interest in clinical outcomes research and health technology assessment as it pertains to cardiovascular medicine and thoracic aortic disease. Dr. McClure also holds a Master of Science degree in clinical epidemiology from Harvard University (2008). A list of Dr McClure’s publications.
Alim Mitha

Dr. Alim Mitha

Clinical Associate Professor


Alim P. Mitha graduated with an Honors degree in Cellular and Molecular Biology at the University of Michigan in Ann Arbor. After graduating from medical school at the University of Alberta, he did his residency training in Neurosurgery at the University of Calgary. During that time, he also completed a Masters of Science degree with a focus in Bioengineering at Harvard University, while also doing a research fellowship at the Massachusetts General Hospital in Boston. He subsequently did an additional two years of clinical subspecialty training in Cerebrovascular, Endovascular, and Skull Base Neurosurgery at the Barrow Neurological Institute in Phoenix, Arizona. Since 2011, he has been practicing as a Cerebrovascular, Endovascular, and Skull Base Neurosurgeon at the Foothills Medical Centre in Calgary. His clinical focus is on the vasculature of the head and neck, including brain aneurysms and carotid disease, and also in vascular bypasses for thoracic aortic arch reconstructions. His research interest lies in tissue engineering and biomedical device development as it relates to vascular diseases. A list of Dr. Mitha’s publications.
Akash update

Akash Fichadiya, MSc, BN

Research Associate

Akash Fichadiya is a recent graduate of the Accelerated-Track Bachelor of Nursing program at the University of Calgary. Prior to this, he also completed an MSc (2014) in the McCaig Institute of Bone & Joint Health, and BHSc Hons. (2012) from the University of Calgary. His MSc thesis established a novel ex-vivo system to study stem cell regeneration of articular cartilage in osteoarthritis, while his undergraduate research in the UofC Spine Program assessed the merits of different cervical spine surgeries. His Current Areas of Interest Include: Endovascular and Total arch repair for Acute Type A Aortic Dissection, neuroprotection in cardiac surgery, metabolomics in aortic pathology, and patient education. A list of Akash’s publications.

Clare Russell

Research Coordinator, Administration Assistant and Communications Officer

Clare has worked in the health industry for over 25 years and is Dr Appoo’s personal assistant at Foothills Medical Centre. She is a qualified medical secretary and has worked in Cardiothoracic Surgery and Cardiology for many years, here in Canada and in the United Kingdom.