In this video, Dr. Atul Verma, Head Dept. of Nuclear Medicine, Fortis Hospital, New Delhi, will talk about the various protocols for nuclear myocardial studies. When only thallium is used, stress thallium, 4-hour redistribution imaging and late re-injection or a late redistribution imaging is done. When the thallium is injected, immediately the scanning is started. After 4 hours, the patient are called for second scan. Dr. Atul will talk about the myocardial hibernation and what protocol to be used.