Patrick is a specialist in both general cardiology and internal medicine, and practices at North Shore and Waitakere Hospitals. He trained in cardiology at the Greenlane Cardiovascular Service and completed a fellowship in Advanced Cardiac Imaging at the Cleveland Clinic Foundation in 2010. In 2012 he gained a PhD in cardiovascular medicine.

His areas of expertise are in cardiac imaging, personalised healthcare and angiography. He also has a particular interest in the latest developments in genomic medicine, which is when information about a patient's genetic make-up can be used to customise their treatment. He founded Theranostics Laboratory, a web-based DNA testing company.