Dr Mark Nallaratnam




Areas of Interests

  • Coronary angiography and interventions
  • Radial and femoral access
  • Complex coronary interventions including Rotablator and chronic total occlusions (CTOs)
  • PFO/ASD closure
  • Peripheral angiography and intervention.


20/445 Victoria Avenue, Chatswood 2065


9188 3010



Other practice locations

St George Private Hospital Consulting Suites Suite 16, Level 4 1 South Street Kogarah 2217

Southern Cardiology - 74 Kareena Rd, Miranda 2228 
Phone: 02 9526 8820 


Dr Nallaratnam is an interventional cardiologist and vascular physician consulting at St George Private Hospital and Southern Cardiology, Miranda. Additionally, Dr Nallaratnam has VMO admitting rights at The Mater Hospital, North Shore Private Hospital, Kareena Private Hospital, Hurstville Private Hospital, Strathfield Private Hospital and The National Capital Private Hospital.

He has a particular interest in diagnostic coronary angiography and complex coronary interventions. His other interests include vascular medicine and structural heart disease including ASD/PFO/PDA closure.

Dr Nallaratnam was awarded the Gold Medal for first place in Medicine and Surgery during his undergraduate degree. Before extensive training at the Alfred Hospital in Melbourne where he was involved in ICU and Haemostasis/Thrmobosis among other specialties. Dr Nallaratnam has had extensive experience in heart failure and heart transplantation as well as General Cardiology. He then completed a two-year interventional and research fellowship at Christchurch Hospital and the University of Otago, New Zealand. His research focus was micro-vascular perfusion defects following myocardial infarction. He was the recipient of several prestigious research grants including the Boston Scientific Interventional Fellow grant and Cardiac Society of Australia and New Zealand Research Grant.

In 2007, he spend two years as the chief fellow in both interventional cardiology and vascular medicine at Boston University Medical Center, US. 

Dr Nallaratnam has a strong commitment to teaching both junior and senior medical staff having held a two-year appointment at Boston University as clinical tutor. He is co-author on several peer-reviewed papers and has co-authored several book chapters in the area of cardiology and vascular medicine.
Dr Nallaratnam is a fellow of the Royal Australasian College of Physicians, fellow of The Cardiac Society of Australia and New Zealand, affiliate member of The American College of Cardiology, and associate member of both the Society of Vascular Medicine and The Society of Coronary Angiography and Interventions.