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About us

Strong Hearts was founded in 2023 in Darwin with the aim of providing high quality cardiac diagnostic services to regions that need them the most.  We offer  mobile cardiac testing services in convenient locations, saving patients lengthy and expensive travel.  Having worked in the Northern Territory and across the north of Australia for over a decade, we understand the needs and demands of cardiac care in this setting. We are passionate about regional and rural health and are driven to improve cardiac health outcomes in these locations. 


Alex Kaethner

Cardiac Physiologist/Director

Alex is an experienced Cardiac Physiologist with a passion for quality cardiac care and improving accessibility in healthcare for those who need it most. He has been working as a Cardiac Sonographer for 18 years and in the Northern Territory for the past 15.


As well as his past clinical and managerial roles, he has contributed to many research projects within Australia, Timor-Leste and across the Pacific focusing on early detection of Rheumatic Heart Disease. He was awarded Australasian Humanitarian of the Year in 2022 by the Australasian Society of Ultrasound in Medicine(ASUM) for his work in RHD and capacity building.


Alex has a passion for teaching and skills development - a core factor of Strong Heart’s mission.

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