Dr Primero Ng is an interventional cardiologist whose practice focuses on chronic total occlusion (CTO) PCI, complex and high-risk coronary intervention, and imaging- and physiology-guided coronary care. He treats patients with long-standing arterial blockages, heavily calcified arteries, multivessel and left main disease, failed or under-expanded stents, and coronary disease where the right course of treatment is not straightforward. This includes patients seeking a second opinion on complex coronary disease. He also sees patients for preventive cardiology, and reports and uses cardiac CT to guide assessment and procedure planning. He is an Interventional Cardiologist at Royal Perth Hospital.
Successful coronary care, in Dr Ng's view, is not measured only by what happens to an artery. It is measured by whether a patient understands their condition, is able to make an informed decision about it, and returns to living well. His practice is deliberate, imaging-guided and evidence-based, and every recommendation is shaped by the individual patient's anatomy, symptoms, risk and personal goals.
Training and qualifications
Dr Ng graduated with honours in medicine from the University of Western Australia and completed specialist cardiology training across Perth's major tertiary hospitals, gaining Fellowship of the Royal Australasian College of Physicians. He then undertook advanced coronary training at Royal Perth Hospital, building a foundation in intravascular imaging and coronary physiology, alongside a fellowship in cardiac CT.
He was subsequently selected as the only overseas fellow to train at the University of Washington Medical Center in Seattle, where he completed a formal Complex and High-Risk Indicated PCI (CHIP) fellowship under Dr Bill Lombardi, Dr Kate Kearney and Dr Lorenzo Azzalini. He is a Fellow of the American College of Cardiology and a Fellow of the Society for Cardiovascular Angiography and Interventions.
Published research
Dr Ng is the author of multiple peer-reviewed publications, several as first author, in journals including the Journal of the American College of Cardiology, EuroIntervention, Catheterization and Cardiovascular Interventions, Heart and European Heart Journal Open.
- Stent underexpansion. First author of the 2025 review on the management of coronary stent underexpansion in the Journal of the American College of Cardiology (2025;85:625–644), with co-authors including Akiko Maehara, Ajay Kirtane, Margaret McEntegart, Farouc Jaffer and Emmanouil Brilakis.
- New CTO techniques. First author of the paper describing SLASH (Snare-Assisted Laceration of Subintimal Hematoma), a technique for preserving side branches during bifurcation CTO PCI (Catheterization and Cardiovascular Interventions, 2025), and of reports on retrograde Scratch-and-Go, retrograde balloon-assisted subintimal entry and perfusion-balloon reverse CART (Canadian Journal of Cardiology 2026; Catheterization and Cardiovascular Interventions 2026; EuroIntervention 2025).
- CTO outcomes. Review of CTO PCI after bypass surgery (Interventional Cardiology Clinics, 2026), and co-author of studies on same-day discharge and ECG changes after CTO PCI, and of PROGRESS-COMPLICATIONS registry papers.
- Western Australian research. Co-author of Royal Perth Hospital studies on coronary microvascular physiology and on survival and prosthesis choice after aortic valve surgery (Heart 2026; European Heart Journal Open 2026).
In 2026 he was named to SCAI's 30 in Their 30s. Full list of publications
Clinical practice
Dr Ng treats chronic total occlusions (arteries completely blocked for three months or longer), along with in-stent restenosis and stent underexpansion, heavily calcified coronary arteries, multivessel and left main disease, and angina that persists despite optimal medical therapy. A substantial part of his practice involves revascularisation for patients who have been declined bypass surgery or who wish to avoid it, with decisions made with a Heart Team, including a cardiac surgeon where appropriate. He welcomes second opinions where patients have been told no further treatment is possible. Not every patient will be suitable for further treatment, and options are discussed honestly.
Intravascular ultrasound, optical coherence tomography and pressure-wire physiology are used in most procedures, where they help decide whether and how to treat, and whether the result is likely to last. Being dual-trained in cardiac CT, he is also able to plan non-invasive and invasive assessment together, and reports coronary CT angiography and calcium scoring for Western Radiology.
Where he practises
Dr Ng holds a public appointment as an Interventional Cardiologist at Royal Perth Hospital, where he is Co-Lead of the Complex Coronary Therapeutics Program. In this role he helps advance complex coronary care, develop structured referral and treatment pathways, and improve access to contemporary interventional techniques for patients across Western Australia.
In private practice, he consults at his rooms at Bethesda Mount Medical Centre (Suite 41, 146 Mounts Bay Road, Perth) and in Mandurah (57 Murdoch Drive, Greenfields), and performs coronary procedures at Bethesda Mount Hospital, Hollywood Private Hospital and St John of God Murdoch Hospital. He also reports cardiac CT studies for Western Radiology, supporting an integrated, imaging-led approach to diagnosis and treatment planning.
Qualifications and fellowships
MBBS (Hons)
Foundation medical degree with honours from the University of Western Australia
FRACP
Fellow of the
Royal Australasian College of Physicians
FACC
Fellow of the
American College of Cardiology
FSCAI
Fellow of the
Society for Cardiovascular Angiography & Interventions
For GPs
- Refer for: chronic total occlusion, in-stent restenosis or stent under-expansion, heavily calcified disease, left main or multivessel disease, angina despite optimal therapy, or patients declined for CABG. General cardiology, cardiac CT review and atrial fibrillation referrals are also accepted.
- Second opinions: send the angiogram disc or a PACS link and prior reports with the referral.
- Where: private rooms at Bethesda Mount Medical Centre (Perth) and Mandurah; procedures at Bethesda Mount Hospital, Hollywood Private Hospital and St John of God Murdoch Hospital. Referral details are on the For Referring GPs page.