Getting a second opinion for my son's mitral valve issues was the #1 best decision we ever made, hands down.
Our local cardiologist told us to wait and replace his mitral valve in a few years. In his opinion, the current valve wasn't salvageable. Because our goal was to replace the valve, we were letting LO's heart enlarge until it reached the size of an adult so the valve we implanted would be larger.
I was pretty intimidated by the idea of getting a second opinion, but once I spoke with someone at the surgeon's office everything became really simple. Most offices will have processes in place and can easily give you instructions and let you know what to expect when seeking a second opinion. All you need to do is figure out the number to call. After that things get pretty easy.