He studied at the University of Pretoria in South Africa, graduating in Medical Sciences and Surgery in 1992, then moved to England in 1995 to take up the position of Senior House Officer in general medicine at Cheltenham General Hospital, where he obtained membership of the Royal College of Physicians.
In 1997 Dr Patterson became the Specialist Registrar in general medicine and clinical pharmacology at Ninewells Hospital in Dundee, where he specialised in cardiovascular research. Subsequently he became the Research Fellow and Cardiology Registrar at the Hypertension research unit and Coronary care unit at Dundee University.
In 2003 he became the Clinical Lecturer in cardiovascular medicine and Honorary Specialist Registrar in general medicine at the Tayside University Hospital, Dundee – a role that included a training post in cardiovascular medicine and the assessment of acute vascular referrals. He was involved in teaching, such as a regional primary care workshop in cardiovascular disease, and has published widely within his specialist field.
He is a member of the British Cardiovascular Society, British Echocardiography Society and the British Medical Association. In 2010 he underwent further specialist training for the reporting of CT Coronary angiography.
Since coming to Guernsey, Dr Patterson has introduced non-invasive cardiovascular stress testing, with the support of the Nuclear medicine and Radiology departments at the Princess Elizabeth Hospital, enabling assessment of patients at risk of heart attack prior to routine surgery.
He introduced a protocol for the treatment of patients with heart attacks which has helped to maximise the medical treatment of these patients and led to the introduction of critical off-island referrals for coronary angiography and stenting.