Thanks to medblogger Rohan Aurora, we learned that the folks at AliveCor, a small company that developed an iPhone 4 case with a built-in ECG, just unveiled a smaller and more streamlined ECG that can work with any iPhone or iPad. The iCard ECG has a profile smaller than a business card and sticks to the back of an iPhone or iPad using Velcro and immediately integrates with a companion app running on the device. Here’s a demo of the new product: