stemi 12 lead tool horizontal reference badge id card (1 card) scrubs and stuff llc this badge card is a 12 lead stemi reference tool. it shows the standard 12 lead layout and the associated “adjacent” leads relative to the location in the heart. on the back there is also a chart of st changes and their association to particular coronary vessels. the tool also includes a ruler for measuring st elevation and depression. <br> <br> this badge card comes from a series of cards that puts hard to memorize information at your fingertips. it has a standard slot pre-punched that will work with badge clips and badge reels. <br> <br> this card also comes in both vertical or horizontal format. purchase whichever version works best for you. <br> <br> card made of durable plastic, is waterproof, and is about half the thickness of a credit card so it wont weigh down your badge reel or feel bulky. <br> <br> double sided and uses the entire printable area to maximize the total information. same as a standard badge id card (or credit card size; 3 3/8" by 2 1/8").