Single rest myocardial perfusion study for the assessment of the extent and severity of viable and non‑viable myocardium, with single photon emission tomography, with or without planar imaging, if: (a) the patient has left ventricular systolic dysfunction and probable or confirmed coronary artery disease; and (b) the service uses: (i) an initial rest study followed by a redistribution study on the same day; and (ii) a thallous chloride‑201 (Tl‑201) protocol; and (c) the service is requested by a specialist or a consultant physician; and (d) the service is not associated with a service to which item 11704, 11705, 11707, 11714, 11729, 11730, 61321, 61329, 61345, 61398 or 61406 applies; and (e) if the patient is 17 years or older: (i) a service to which item 61321, 61329, 61345, 61398 or 61406 applies has not been provided to the patient in the previous 24 months; and (ii) the service is applicable only twice each 24 months (R)