Our Health Professionals


Dr Nicholas Collins

Cardiologist specialising in General, Adult, Congenital and Paediatric heart disease. Dr Collins also performs interventional procedures such as angiography, angioplasty, device closures, cardioversion and transoesophageal echocardiography. Dr Collins also has clinics at John Hunter Hospital and Cessnock.

Dr Bruce Bastian

Specialising in Adult heart disease, Dr Bastian works with us Fridays. Dr Bastian works at John Hunter Hospital as a senior staff specialist in the Cardiology Department.

Dr Rachael Hatton

Dr Rachael Hatton joined our practice in August 2014.  Dr Hatton is an experienced cardiologist with an interest in interventional cardiology, including angiography, percutaneous coronary intervention and complex structural interventional procedures, congenital heart disease and exercise stress testing.  Dr Hatton will be seeing adult and congenital patients at our Hamilton rooms. Rachael is a VMO at LMPH and various private hospitals in the area.

Dr Rosauro Mejia

Dr Rosauro Mejia is a Cardiothoracic Surgeon who works from our rooms on Mondays.

Dr Jascha Kehr

Cardiologist who specialises in Paediatrics. Dr Kehr sees patients from 0-18 years of age on Monday afternoons. Dr Kehr also has clinics at the John Hunter Hospital.


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.

Karen Hetherington

Karen performs adult echocardiograms. Karen works in our practice on Mondays, Tuesdays, and Wednesdays. Echo appointments with Karen are performed in our rooms at 58A Cleary Street, Hamilton. Our receptionist will advise you of this when booking your appointment.

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 and provides event telemetry service for both paediatric and adult patients on selected Thursdays.