Basics of Reading Myocardial Perfusion SPECT to Identify Coronary Artery Lesions

In a polar map display, the LAD originates from an area corresponding to 11 o’clock, and the relationship between localization of the culprit lesion and diagonal arteries can be inferred by the extent of decreased perfusion extending from 12 o’clock towards 1 o’clock. The location of a lesion in the LCX main trunk can be inferred by whether decreased perfusion is observed at any level within 2〜5 o’clock. Infarction volume depends on the anatomical size of the territories of the PD and AV but not on the location of a culprit lesion in the RCA trunk.