In recent years methods have been developed to study cardiac function, myocardial blood flow and myocardial metabolism with radionuclides. These developments have been facilitated through the introduction of new radiopharmaceuticals, the design of special gamma cameras and dedicated computer systems. However, part of the information provided by nuclear cardiology can also be obtained through other investigations such as echocardiography, exercise electrocardiography and cardiac catheterisation with ventriculography and coronary arteriography. Thus the practising physician must select the most...