Here is an interesting dress that reads and digitizes your heart activity. The Monitor Dress has 3 electrodes inside to measure the electrical signals running through your body. The microcontroller lights up a circle of LEDs in front of the device when it receives the proper signals.
You are going to need a NeoPixel Ring, heart rate monitor, Photon, sensor pads, and a few other parts to get started. More information is available at the link below.