Improving CPR quality during and after an event Q-CPR™ is the most clinically proven CPR measurement and feedback tool. Next Generation Q-CPR is available as a fully integrated option with the HeartStart MRx Monitor/Defibrillator and offers several vital advances, based on the latest research, and input from current Q-CPR users. Optimized for AHA/ERC 2010 CPR Guidelines. MRx display can be configured to display either standard for depth and rate. Delivers instant audiovisual feedback of compression depth and rate, complete chest recoil, hands-off time and ventilation rate. Stores data captured during actual cardiac events to help you fine-tune your technique.