【Design & Easy to Read】Adopts a step-by-step design with clear scale and guidance, and is used to measure key ECG intervals, including PR interval, QRS interval, elevation/depression and T. Very suitable for beginners and experienced professionals. The right size is just the right size, which can be placed in an ID folder for easy storage and access. The 7-step ECG interpretation method is taken into account in the special design. Education & Practicality - An excellent learning aid for medical students, nurses and cardiologists. The ruler's 7-step guide provides quick reference for ECG interpretation, saving time and improving confidence. 7-Step ECG Ruler - Clear ID-sized cards make ECG interpretation simple. With the step-by-step process, there are benchmarks to the road that are suitable for those key points that are difficult to remember. GREAT FOR THE CLINICAL SETTING - Anyone who is performing ECG/ECG can practice, from students to experienced doctors. This ECG ruler is a tool to improve the efficiency and accuracy of diagnosis in a fast-paced environment., Weight: 0.0551155655 pounds, Manufacturer: Rtxbvg