I'm really struggling with measuring the ST Segment for ST elevation and ST depression... I have come across 'finding the J point and measuring down to where the graph is'... or 'starting at the S wave and moving 2 boxes across to measure'... I am finding all the parts like the isoelectric line, graph line, J point etc difficult to find because I don't know what I'm supposed to measure, and it's getting confusing. Can someone help please???