The Rapid Cardiac Analysis Tool (R-CAT) Window is a Flexible 3.25" x 6.75" plastic card with a reversible see-through baseline window that can be used for identifying ST changes associated with cardiac ischemia, injury and infarction. It also contains comparison examples of normal sinus rhythms and variations of ST deviation. The R-CAT Window features unique calibrated tools for evaluating heart rate, PR, QRS, QT intervals and significant Q-Waves. This product can be used for both EKG rhythm strip and 12 lead EKG analysis. Color coded format illustrates EKG areas to the hearts surface for 12 lead interpretation. Can be marked on with a dry erase marker and wiped off for both staff and patient education.