Newcastle Adult & Paediatric Heart Centre

Our Health Professionals


Dr Nicholas Collins

(Practice Principal)

Nick completed his undergraduate education at the University of Newcastle in 1998 and completed cardiology training at the John Hunter Hospital in 2005.  Dr Collins then completed Fellowships in Adult Congenital Heart Disease and Interventional Cardiology at the Toronto General Hospital/University Health Network, Toronto, Canada.  Particular interests include congenital heart disease, pulmonary hypertension, peri-operative cardiology assessment and interventional cardiology, focusing on complex coronary and interatrial interventions, including atrial septal defect and patent foramen ovale closure.

Dr Collins is currently Director of the Cardiac Catheterisation Laboratory at the John Hunter Hospital, Newcastle, Australia and conjoint Associate Professor at the University of Newcastle. Nick has been involved in education at undergraduate and postgraduate levels, as well as research projects, focusing on congenital heart disease, pulmonary hypertension and interventional cardiology.

Dr Bruce Bastian


Dr Bastian specialises in adult heart disease and works at our rooms on a Friday. Dr Bastian also works at John Hunter Hospital and is a conjoint lecturer at the Newcastle University.

Dr Rachael Hatton


Rachael completed her undergraduate education at the University of Newcastle and completed cardiology training at Newcastle. Rachael underwent fellowships in Adult congenital Heart Disease and Interventional Cardiology at Toronto General Hospital, Canada. Dr Hatton’s special interests include complex coronary and interatrial interventions, including atrial septal defect and patent foramen ovale closure.  Adult congenital heart disease, structural heart disease and pregnancy.

Dr Hatton consults patients at Belmont Hospital and consults in a joint clinic with Maternal Foetal Medicine at John Hunter Hospital.  Dr Hatton performs interventional procedures such as angiography and angioplasty at Lake Macquarie Private Hospital and John Hunter Hospital.

Dr Jascha Kehr


Dr Jascha Kehr was born in Germany. He attended Medical school Georg August University and Johannes Gutenberg University in Germany and the University Victor Segalen in Bordeaux, France.

Jascha trained in basic Paediatric and Cardiology training at the University Children’s Hospital in Mainz, Germany before moving to New Zealand in 2011 where he completed basic paediatric training and went on to do Paediatric Cardiology training. Jascha undertaken cardiology Fellowships in Mainz, Germany, at the Greenlane Paediatric and Congenital Cardiac Service, Starship Hospital Auckland and at the Heart Centre for Children at the Children’s Hospital at Westmead.

Dr Kehrs special interests include General Paediatric Cardiology, Fetal Cardiology, Heart rhythm abnormalities and Inherited cardiac conditions (genetic cardiology). Dr Kehr is multilingual and speaks German, French and Spanish.

Dr David Baker – Locum


Dr David Baker is a clinical academic cardiologist with special interests in Adult Congenital Heart Disease, advanced cardiac imaging, and broader interests in arrhythmia, heart failure and pulmonary hypertension. David is appointed as Staff Specialist at Royal Prince Alfred Hospital in Sydney, and visits Newcastle once per month, at present.

David graduated from the University of Newcastle in 2007 and the Australian National University in 2011. He was awarded his FRACP in 2019 after completing medical and cardiology training at the John Hunter Hospital, Newcastle. David completed his Clinical Fellowship in Adult Congenital Heart Disease at the Royal Prince Alfred Hospital and is currently appointed as the Clinical Fellow at Cardiovascular Magnetic Resonance, Sydney. A keen teacher, David is also appointed as an Honorary Lecturer at the University of Sydney, teaching and supervising for the Sydney Medical School.

Dr Nicholas Whitehead

(Bmed, FRACP)

Dr Nicholas Whitehead is a general and interventional cardiologist.

Dr Whitehead completed his Bachelor of Medicine at the University of Newcastle. He undertook post-graduate training in the Hunter New England health district, completing cardiology specialty training. He has subsequently undertaken two fellowships in interventional cardiology (angiography and stenting), at The Northern Hospital in Melbourne, and at Toronto General Hospital in Canada.

Dr Whitehead has a broad interest in cardiology including general cardiology, heart failure, and arrhythmias. His subspeciality interest is coronary artery disease and interventional cardiology – coronary angiography and percutaneous coronary intervention (stenting).

Dr Whitehead consults at Newcastle Adult and Paediatric Heart Centre, in Hamilton, and has appointments at Calvary Mater Newcastle and Lake Macquarie Private hospitals.

Dr Kate Jardine


Kate Jardine is a Paediatric Cardiologist who has trained in both General Paediatrics and Paediatric Cardiology.

She attended Medical School at the University of Queensland and graduated in 2007.  She completed her General Paediatric Fellowship in Queensland and undertook additional speciality training in Paediatric Cardiology at Starship Children’s Hospital, Auckland, New Zealand. She was awarded a dual Fellowship in Paediatric Cardiology and General Paediatrics in 2018.

She has worked recently as Consultant in Tertiary Level Paediatric Cardiology Centres in Adelaide and Perth, and is keen to bring this recent experience to her current practice.  

Dr Rosauro Mejia


Dr Ross Mejia is a cardiothoracic surgeon. Ross trained in cardiothoracic surgery in the John Hunter Hospital, Royal Prince Alfred Hospital and The Prince Charles Hospital. He concluded his fellowship at The Prince Charles Hospital and Westmead Hospital. His fellowship included transplantation and adult congenital surgery.


Luke Warner

Echocardiographer specialising in adult, paediatric, foetal and contrast echocardiograms. Luke works 5 days per week, Monday to Friday.

Charlotte Poposki

Charlotte performs adult, adult congenital and paediatric studies. Charlotte works Thursdays from 10am to 2pm and Fridays from 9am to 5pm.

Matthew Hunt

Matt performs adult echocardiograms and works in our practice on Tuesdays and Wednesdays.

Toni Gardiner

Toni performs adult echocardiograms on a Monday, Tuesday, Wednesday and Friday.

Stephen Blume  (Trainee sonographer)

Stephen is our trainee sonographer. Stephen assists with adult echocardiograms and may be present in the echo lab with a senior sonographers at the time of appointment with patient consent.

Administration Staff

Office Management


Our receptionists are an integral part of our team and committed to providing the best customer service possible:

Technical Staff

Emily Morris – ECG Technician

Our technician assists in performing exercise stress tests, provides event telemetry and holter monitoring services for both paediatric and adult patients on selected Thursdays.