Peter Attia· MD
So through the tip of that catheter, there's a little plastic one-way valve and you can thread things in. You can thread in other plastic catheters. So in this case, you thread in a regular coronary catheter, which I think is like two millimeters. You thread that in. You can then, under x-ray guidance, with a wire to make it a little stiffer, guide it all the way up around the arch of the aorta and back down. Back down to the base of the heart where the coronary ostea are.