I had my second OHS 9 weeks ago and was down at the beach last weekend with a very low cut tankini top. I made sure the part of my scar showing was adequately protected with sunscreen, but it honestly doesn't worry me. In fact I was quite disappointed no-one really looked at all! Talk about damage a girl's ego... sure they might not have noticed the scar straight away, but they should have been looking anyway!!!
In my experience, most people are too self-involved (worrying about their own perceived problems) to notice other people's scars... and when they do, what a great opportunity to educate them about your heart condition. Sometimes you get to meed someone else with a scar too and then it's lovely to know you're kindred spirits. It's amazing the friends you make that you might otherwise never have known.
And in the meantime - CONGRATULATIONS and welcome to the forum!!
A : )