More and more of our cardiac patients are having scans to check what is going on in their hearts. There were about 1,200 single photon emission computed tomography (SPECT) scans per million population in the UK in 2000, according to the British Nuclear Cardiology Society (BNCS) survey. The National Institute for Health and Clinical Excellence (NICE) has recommended this should increase to about 4,000 scans per million population per year, based on current revascularisation and coronary angiogram rates. This article explains what is involved in a myocardial perfusion scan (MPS), giving you the information to answer your patients’ questions.