Paediatric cardiology is concerned with diseases of the heart in the growing and developing individual. As well as expertise in heart disease, paediatric cardiologists also need a thorough grounding in general paediatrics, to provide all-round patient care. Paediatric cardiologists broadly treat congenital heart disease (present at birth), arrhythmias (variations in heartbeat rhythm) and disturbances of circulatory function. The initial assessment performed by the paediatric cardiologist might start with a physical examination using a stethoscope, after which more detailed investigations may be suggested. Patients often present with complex diagnostic and medical problems and after the initial assessment the paediatric cardiologist then chooses an optimal management plan. They work closely with a wide range of specialists as part of a multidisciplinary team to assess and treat patients.