Stephen J. Nicholls

Stephen J. Nicholls

MBBS, PhD, FACC, FAHA

Cardiologist

20+ years of experience in cardiology

📍 Melbourne

About of Stephen J. Nicholls

Stephen J. Nicholls is a cardiologist based in Melbourne, working from 553 St Kilda Road, VIC 3004. Cardiology is all about the heart and blood vessels, and this practice looks after people with both urgent and ongoing heart conditions.


With 20+ years of experience in cardiology, Stephen has helped patients through tough moments like heart attacks, unstable angina, and other heart-related chest pain. At times, care also needs to move quickly, especially when symptoms suggest an acute coronary problem.


Outside of emergencies, the work often includes longer-term heart health. That can mean looking after people with angina, coronary heart disease, and high cholesterol, including inherited forms like familial hypercholesterolaemia and related cholesterol disorders. Conditions such as hypertension, metabolic syndrome, and type 2 diabetes can also be part of the picture, because they raise the risk for heart and blood vessel problems over time.


Heart valve disease is another area of focus. This includes problems like aortic valve stenosis, where treatment may involve procedures such as transcatheter aortic valve replacement (TAVR) or other valve care. For some patients, percutaneous coronary intervention (PCI) and angioplasty may be considered as part of treatment, depending on what’s going on with the coronary arteries.


Some patients need support for heart failure and related issues, including heart failure with preserved ejection fraction (HFpEF). There are also times when the approach includes care for rhythm problems like atrial fibrillation, plus broader vascular concerns such as peripheral artery disease and strokes or transient ischaemic attacks (TIAs).


Stephen’s background includes recognised fellowships, with FACC (American College of Cardiology) and FAHA (American Heart Association), along with MBBS and a PhD. The medical training started with an MBBS from The University of Adelaide in 1994, and a PhD in Medical Biochemistry from the same university in 2004. This mix of clinical training and research training helps keep decision-making grounded and evidence-led.


Research also sits in the background. There are publications listed, and clinical trials have been part of the wider work over time, which can help inform care for complex cases. It’s not about being “one-size-fits-all”. Instead, the aim is to match treatment to the person, their risk factors, and what the heart tests are showing.


If you’re looking for a cardiologist in Melbourne, Stephen J. Nicholls brings long experience, clear communication, and practical care for a wide range of heart conditions, from urgent problems to ongoing management.

Education

  • MBBS (Bachelor of Medicine, Bachelor of Surgery), The University of Adelaide, 1994
  • PhD in Medical Biochemistry, The University of Adelaide, 2004
  • FACC - Fellow of the American College of Cardiology
  • FAHA - Fellow of the American Heart Association

Services & Conditions Treated

Acute Coronary SyndromeAtherosclerosisCoronary Heart DiseaseHigh CholesterolUnstable AnginaFamilial HypercholesterolemiaFamilial HypertriglyceridemiaHeart AttackPericarditisType 2 Diabetes (T2D)AnginaAortic Valve ReplacementAortic Valve StenosisCalcinosisDefective Apolipoprotein B-100Heterozygous Familial Hypercholesterolemia (HeFH)HypertensionMetabolic SyndromeObesityPercutaneous Coronary Intervention (PCI)Peripheral Artery DiseaseSpontaneous Coronary Artery Dissection (SCAD)StrokeTranscatheter Aortic Valve Replacement (TAVR)Abdominal Obesity Metabolic SyndromeAcute PancreatitisAngioplastyArthritisAtrial FibrillationCardiac TamponadeCardiomyopathyCerebral HypoxiaCongenital Coronary Artery MalformationCOVID-19EndocarditisFluHairy Cell Leukemia (HCL)Heart FailureHeart Failure with Preserved Ejection Fraction (HFpEF)Heart TransplantInfective EndocarditisJuvenile Idiopathic Arthritis (JIA)Mesenteric Venous ThrombosisNon-Alcoholic Fatty Liver DiseasePneumoniaPremature Ovarian FailureSevere Acute Respiratory Syndrome (SARS)Strep ThroatTransient Ischemic Attack (TIA)Type B Insulin Resistance SyndromeVasoconstriction

Publications

5 total
Lepodisiran - A Long-Duration Small Interfering RNA Targeting Lipoprotein(a).

The New England journal of medicine • March 31, 2025

Steven Nissen, Wei Ni, Xi Shen, Qiuqing Wang, Ann Navar, Stephen Nicholls, Kathy Wolski, Laura Michael, Axel Haupt, John Krege

Background: Elevated lipoprotein(a) concentrations are associated with atherosclerotic cardiovascular disease. The safety and efficacy of lepodisiran, an extended-duration, small interfering RNA targeting hepatic synthesis of lipoprotein(a), are unknown. Methods: We randomly assigned participants in a 1:2:2:2:2 ratio to receive lepodisiran at a dose of 16 mg, 96 mg, or 400 mg at baseline and again at day 180, lepodisiran at a dose of 400 mg at baseline and placebo at day 180, or placebo at baseline and at day 180, all administered by subcutaneous injection. Data from the two groups that received lepodisiran at a dose of 400 mg at baseline were pooled for the primary analysis. The primary end point was the time-averaged percent change from baseline in the serum lipoprotein(a) concentration (lepodisiran difference from placebo [i.e., placebo-adjusted]) during the period from day 60 to day 180. Results: A total of 320 participants underwent randomization; the median baseline lipoprotein(a) concentration was 253.9 nmol per liter. The placebo-adjusted time-averaged percent change from baseline in the serum lipoprotein(a) concentration from day 60 to day 180 was -40.8 percentage points (95% confidence interval [CI], -55.8 to -20.6) in the 16-mg lepodisiran group, -75.2 percentage points (95% CI, -80.4 to -68.5) in the 96-mg group, and -93.9 percentage points (95% CI, -95.1 to -92.5) in the pooled 400-mg groups. The corresponding change from day 30 to day 360 was -41.2 percentage points (95% CI, -55.4 to -22.4), -77.2 percentage points (95% CI, -81.8 to -71.5), -88.5 percentage points (95% CI, -90.8 to -85.6), and -94.8 percentage points (95% CI, -95.9 to -93.4) in the 16-mg, 96-mg, 400-mg-placebo, and 400-mg-400-mg dose groups, respectively. Serious adverse events, none of which were deemed by investigators to be related to lepodisiran or placebo, occurred in 35 participants. Dose-dependent, generally mild injection-site reactions occurred in up to 12% (8 of 69) of the participants in the highest lepodisiran dose group. Conclusions: Lepodisiran reduced mean serum concentrations of lipoprotein(a) from 60 to 180 days after administration. (Funded by Eli Lilly; ALPACA ClinicalTrials.gov number, NCT05565742.).

Safety and Efficacy of Obicetrapib in Patients at High Cardiovascular Risk.

The New England Journal Of Medicine • May 08, 2025

Stephen Nicholls, Adam Nelson, Marc Ditmarsch, John J Kastelein, Christie Ballantyne, Kausik Ray, Ann Navar, Steven Nissen, Mariko Harada Shiba, Danielle Curcio, Annie Neild, Douglas Kling, Andrew Hsieh, Julie Butters, Brian Ference, Ulrich Laufs, Maciej Banach, Roxana Mehran, Alberico Catapano, Yong Huo, Michael Szarek, Violeta Balinskaite, Michael Davidson

Background: Obicetrapib is a highly selective cholesteryl ester transfer protein inhibitor that reduces low-density lipoprotein (LDL) cholesterol levels. The efficacy and safety of obicetrapib have not been fully characterized among patients at high risk for cardiovascular events. Methods: We conducted a multinational, randomized, placebo-controlled trial involving patients with heterozygous familial hypercholesterolemia or a history of atherosclerotic cardiovascular disease who were receiving maximum tolerated doses of lipid-lowering therapy. Patients with an LDL cholesterol level of 100 mg per deciliter or higher or a non-high-density lipoprotein (HDL) cholesterol level of 130 mg per deciliter or higher, as well as those with an LDL cholesterol level of 55 to 100 mg per deciliter or a non-HDL cholesterol level of 85 to 130 mg per deciliter and at least one additional cardiovascular risk factor, were eligible for inclusion. The patients were randomly assigned in a 2:1 ratio to receive either 10 mg of obicetrapib once daily or matching placebo for 365 days. The primary end point was the percent change in the LDL cholesterol level from baseline to day 84. Results: A total of 2530 patients underwent randomization; 1686 patients were assigned to receive obicetrapib and 844 to receive placebo. The mean age of the patients was 65 years, 34% were women, and the mean baseline LDL cholesterol level was 98 mg per deciliter. The least-squares mean percent change from baseline to day 84 in the LDL cholesterol level was -29.9% (95% confidence interval [CI], -32.1 to -27.8) in the obicetrapib group, as compared with 2.7% (95% CI, -0.4 to 5.8) in the placebo group, for a between-group difference of -32.6 percentage points (95% CI, -35.8 to -29.5; P<0.001). The incidence of adverse events appeared to be similar in the two groups. Conclusions: Among patients with atherosclerotic cardiovascular disease or heterozygous familial hypercholesterolemia who were receiving maximum tolerated doses of lipid-lowering therapy and were at high risk for cardiovascular events, obicetrapib reduced LDL cholesterol levels by 29.9%. (Funded by NewAmsterdam Pharma; BROADWAY ClinicalTrials.gov number, NCT05142722.).

The Brussels International Declaration on Lipoprotein(a) Testing and Management.

Atherosclerosis • April 14, 2025

Florian Kronenberg, Nicola Bedlington, Zanfina Ademi, Marius Geantă, Tobias Silberzahn, Marc Rijken, Aedan Kaal, Mariko Harada Shiba, Zhenyue Chen, George Thanassoulis, Bogi Eliasen, Jean-luc Eiselé, Albert Wiegman, Christie Ballantyne, Emma Broome, Michele Calabrò, Pablo Corral, Annelies Dol, Leslie Donato, Elsie Evans, Sayaka Funabashi, Ioanna Gouni Berthold, Iñaki Ibarluzea, Neil Johnson, Joanna Lane, Samia Mora, Børge Nordestgaard, Ivan Pećin, Renate Kaal Poppelaars, Michel Langlois, Kausik Ray, Arthur Rodenbach, Raul Santos, Erik S Stroes, Hayato Tada, Michal Vrablík, Michelle Winokur, Masayuki Yoshida, Stephen Nicholls, Magdalena Daccord

There is striking evidence that a high lipoprotein(a) [Lp(a)] concentration is a strong, independent, and causal cardiovascular risk factor. However, Lp(a) testing rates are very low (1 %-2 %) despite the fact that 1 in 5 individuals have elevated Lp(a) concentrations. The Brussels International Declaration on Lp(a) Testing and Management was co-created by the Lp(a) International Task Force and global leaders at the Lp(a) Global Summit, held in Brussels, Belgium, on March 24-25, 2025. The event, organized by FH Europe Foundation, brought together scientific experts, people with the lived experience of elevated Lp(a) and policy makers from the European Institutions and World Health Organization. The World Heart Federation, Global Heart Hub, and European Alliance for Cardiovascular Health and scientific organizations such as European Atherosclerosis Society, and International Atherosclerosis Society were formal partners. The Summit was hosted by a Member of the European Parliament, Romana Jerković, and held under the patronage of the Polish presidency of the Council of the European Union. The Declaration calls for 1) integration of Lp(a) testing and management into Global, European and National Cardiovascular Health Plans; 2) appropriate investment, policy and programmes in targeting Lp(a) testing and management based on a recent study demonstrating the substantial overall cost-saving to health systems across the globe; 3) political commitment to mandate systematic Lp(a) testing at least once during a person's lifetime, ideally at an early age, with full reimbursement; 4) incorporation of Lp(a) test results in the context of a person's cardiovascular risk assessment, with development of personalised cardiovascular health roadmaps as needed, without fear of discrimination; 5) investment in public and healthcare professional education to increase awareness of Lp(a) and its impact on cardiovascular health.

The Brussels International Declaration on Lipoprotein(a) Testing and Management.

Atherosclerosis • April 14, 2025

Florian Kronenberg, Nicola Bedlington, Zanfina Ademi, Marius Geantă, Tobias Silberzahn, Marc Rijken, Aedan Kaal, Mariko Harada Shiba, Zhenyue Chen, George Thanassoulis, Bogi Eliasen, Jean-luc Eiselé, Albert Wiegman, Christie Ballantyne, Emma Broome, Michele Calabrò, Pablo Corral, Annelies Dol, Leslie Donato, Elsie Evans, Sayaka Funabashi, Ioanna Gouni Berthold, Iñaki Ibarluzea, Neil Johnson, Joanna Lane, Samia Mora, Børge Nordestgaard, Ivan Pećin, Renate Kaal Poppelaars, Michel Langlois, Kausik Ray, Arthur Rodenbach, Raul Santos, Erik S Stroes, Hayato Tada, Michal Vrablík, Michelle Winokur, Masayuki Yoshida, Stephen Nicholls, Magdalena Daccord

There is striking evidence that a high lipoprotein(a) [Lp(a)] concentration is a strong, independent, and causal cardiovascular risk factor. However, Lp(a) testing rates are very low (1 %-2 %) despite the fact that 1 in 5 individuals have elevated Lp(a) concentrations. The Brussels International Declaration on Lp(a) Testing and Management was co-created by the Lp(a) International Task Force and global leaders at the Lp(a) Global Summit, held in Brussels, Belgium, on March 24-25, 2025. The event, organized by FH Europe Foundation, brought together scientific experts, people with the lived experience of elevated Lp(a) and policy makers from the European Institutions and World Health Organization. The World Heart Federation, Global Heart Hub, and European Alliance for Cardiovascular Health and scientific organizations such as European Atherosclerosis Society, and International Atherosclerosis Society were formal partners. The Summit was hosted by a Member of the European Parliament, Romana Jerković, and held under the patronage of the Polish presidency of the Council of the European Union. The Declaration calls for 1) integration of Lp(a) testing and management into Global, European and National Cardiovascular Health Plans; 2) appropriate investment, policy and programmes in targeting Lp(a) testing and management based on a recent study demonstrating the substantial overall cost-saving to health systems across the globe; 3) political commitment to mandate systematic Lp(a) testing at least once during a person's lifetime, ideally at an early age, with full reimbursement; 4) incorporation of Lp(a) test results in the context of a person's cardiovascular risk assessment, with development of personalised cardiovascular health roadmaps as needed, without fear of discrimination; 5) investment in public and healthcare professional education to increase awareness of Lp(a) and its impact on cardiovascular health.

Using Codesign to Develop a Health Literacy Intervention to Improve the Accessibility and Acceptability of Cardiac Services: The Equal Hearts Study.

Health Expectations : An International Journal Of Public Participation In Health Care And Health Policy • March 25, 2025

Denise Azar, Sofia Wang, Liz Flemming Judge, Anna Shee, Rebecca Jessup, Laveena Sharma, Shihoko Fukumori, Jason Talevski, Stephen Nicholls, James Harris, Laura Alston, Catherine Martin, Ernesto Oqueli, William Van Gaal, Alison Beauchamp

Background: The burden of coronary heart disease (CHD) is disproportionately greater among socio-economically disadvantaged groups. Health services play a crucial role in addressing this social gradient by ensuring equitable access to care. However, there is limited evidence on effective strategies to improve health service accessibility for CHD patients, particularly those that are codesigned with people with lived experience and clinicians. The Equal Hearts study aimed to codesign a health literacy-based intervention to improve the accessibility of hospital-based cardiac services for underserved population groups with CHD. Methods: This study employed a mixed-methods approach based on codesign principles. The study comprises three phases: identifying and understanding the problem, codeveloping an intervention, and translating the intervention into practice. Phases 1 and 2 are reported in this paper and included focus groups, interviews and an intervention development workshop. Participants for focus groups and interviews were recruited from four health services in [Victoria] and included patients with CHD, health consumers from culturally diverse communities and clinicians. Findings from focus groups and interviews were analysed via thematic analysis using Levesque's conceptual framework to identify health literacy barriers to accessibility of cardiac services. These barriers were prioritised in a codesign workshop with cardiac patients, health consumers and clinicians. Results: Thirty-seven cardiac patients, 10 clinicians and 44 culturally diverse health consumers participated in focus groups/interviews. Among these participants, eight cardiac patients/carers and five clinicians attended the workshop. Cardiac patients reported a lack of preparedness for hospital discharge and feeling 'lost' and uncertain about how to confidently manage their health at home after a cardiac event. A codesigned intervention-The Patient Discharge Action Plan-aims to improve patients' transition from hospital to home. Conclusions: Using a codesign approach and health literacy principles, a health service intervention was developed to improve accessibility of cardiac services. The Patient Discharge Action Plan is currently being evaluated in a pilot RCT. Two consumer co-authors [L.F.J. and J.H.] informed the development of the study protocol. A Stakeholder Advisory Panel, including six people with lived experience of CHD and four clinicians/health service managers from participating sites, guided all steps within this study. Background: ACTRN12624000780550p (Australian and New Zealand Clinical Trials Registry). Registered on 25 June 2024.

Clinical Trials

4 total

The Effect of Tirzepatide Versus Dulaglutide on Major Adverse Cardiovascular Events in Patients With Type 2 Diabetes (SURPASS-CVOT)

Active_not_recruitingPhase 3Tirzepatide, Dulaglutide

The purpose of the trial is to assess the efficacy and safety of tirzepatide to dulaglutide in participants with type 2 diabetes and increased cardiovascular risk.

Participants: 13299

A Double-Blind, Placebo-Controlled Phase 2b Study to Evaluate the Efficacy and Safety of ARO-APOC3 in Adults With Mixed Dyslipidemia

CompletedPhase 2

Participants who have met all protocol eligibility criteria will be randomly assigned to treatment (ARO-APOC3 or placebo) in a double-blind fashion and will be evaluted for safety and efficacy over 48 weeks. Participants will be counseled to remain on a specified diet throughout the study, as recommended by the Investigator in accordance with local standard of care. After week 48, participants will be eligible and invited to consent and continue in an open-label extension study. All placebo participants who opt to continue will switch to active drug (ARO-APOC3) during the extension study.

Participants: 353

A Double-Blind, Placebo-Controlled Phase 2b Study to Evaluate the Efficacy and Safety of ARO-APOC3 in Adults With Severe Hypertriglyceridemia

CompletedPhase 2ARO-APOC3

The purpose of AROAPOC3-2001 is to evaluate the efficacy and safety of ARO-APOC3 in participants with severe hypertriglyceridemia. Participants will receive 2 subcutaneous injections of ARO-APOC3.

Participants: 229

Simultaneous Acquisition of Intravascular Ultrasound and Near Infrared Spectroscopy Data in the Coronary Artery Study

CompletedNot Applicable

The purpose of this study is to investigate and compare the images obtained from coronary imaging catheters used in the treatment of coronary blockages both in a clinical setting with patients and in models.

Participants: 16

Frequently Asked Questions

What services does Dr Stephen Nicholls offer?
Dr Stephen Nicholls provides a range of cardiology services including Acute Coronary Syndrome, Atherosclerosis management, Coronary Heart Disease care, High Cholesterol management, Angina, Heart Attack care, Atrial Fibrillation, Heart Failure (including HFpEF), Pericarditis, Endocarditis, TAVR and PCI, among others.
Which heart conditions does he treat?
He treats conditions such as Coronary Heart Disease, Angina, Acute Coronary Syndrome, Atrial Fibrillation, Heart Failure, Pericarditis, Endocarditis, Aortic Valve issues, and general vascular and metabolic concerns related to cardiology.
Where is Dr Nicholls’ clinic located?
The clinic is at 553 St Kilda Road, Melbourne, VIC 3004, Australia.
What kinds of procedures does he perform?
Procedures include percutaneous coronary intervention (PCI) and transcatheter aortic valve replacement (TAVR) as part of caring for heart disease and valve problems.
Does he treat metabolic and related conditions?
Yes. He works with conditions like Hypertension, Metabolic Syndrome, Type 2 Diabetes, Obesity, and related cardiovascular risk factors.
How experienced is Dr Nicholls?
He has over 20 years of experience in cardiology and holds MBBS, PhD, FACC, and FAHA qualifications.
How can I arrange an appointment with him?
Appointments are available at his Melbourne clinic. Contact the clinic to book a consultation and discuss your heart health needs.