Dad's Surgery

In this first video you see them enter through the hole on his side. The metal clamps you see I believe are propping back his right lung and open his heart. The tube is part of the heart lung machine he was on. The white thing is his mitral valve. You can see how it does not close. When he pulls back the valve, you can see the cords that are supposed to pull the valve shut.
This second video is of his heart after "work". You can see the gortex ring they sewed in place to help hold the valve's shape and the white stiches from shortening the cords, so they actually pull his valve shut. In this video they fill his heart with "fluid" to check its seal and drain it again.