Our group has a website (12leadtrainer.com), that is capable of generating realistic 12 lead EKGs. The generated EKGs are purely digital and only view able on a computer screen. We wanted to create a device that would allow them to be viewed on a real cardiac monitor.
We created a converter that using a variety of technologies, can download EKGs from the website, convert them into realistic voltages using vector math, and then output them via a USB port to an arduino based device. This device has connections for 10 EKG leads that can display to any cardiac monitor.
Our next step will be to create a second prototype that is more compact and physically robust, as well as continuing work on a better link between the website and the arduino.