Welcome, Rhena, from another (although accidental) Texan. I didn't seek a second opinion because I've managed to build a trust-group consisting of my DO (PCP) and my cardio, and my more-or-less accidental surgeon--all of whom have worked together to bring me to four months post-op feeling absolutely great.
There's something about a first-instinct connection that can be valued, so sometimes second opinions aren't necessary. I had already gone through a bypass op, but moved and had to change cardios. At one point I got stupid (off meds for a bit) and was rewarded with a great bayou-boy (Louisiana) cardio guy who's been with me ever since. My DO (another accident--found him right after I moved, because I was bit by a Brown Recluse spider and had to find a doctor fast) has a great PA, and she noticed what she thought might be a brouit but turned out to be a heart murmur that hadn't been noticed since I was 10. Aforementioned new cardio was consulted, and after following my gradually decreasing aortic valve function finally told me it was time. Then the surgeon he had picked out was on Easter holiday and I ended up with a different guy who turned out to be perfect for me. Some good planning, some fortunate accidents, but in the end a good result. A lot depends on the hospital, too, so that's another consideration.
Welcome aboard, and best of luck. Sometimes that's what it takes.