Houston's ​Jim "Mattress Mack" McInvgale posted a video to social media announcing that he's going to have open-heart surgery ...

As this was to be the first implantable life-support device of any kind in people, did we have additional responsibilities beyond the usual associated with open-heart surgery? From the beginning ...

The first sign of trouble came in the summer ... However, my cardiologist noted that the operation is still open-heart surgery, and you don’t want to do that until it’s necessary.