Can you climb El Capitan with a mechanical heart valve? English teacher and rock climber Bob Smith proves that CHD doesn't define your limits. Since his aortic valve replacement, he's conquered Mt. Rainier, El Capitan, and countless expert trails. Discover how some patients redefine what's possible with congenital heart defects. Guest: Bob Smith | Blog: myaorticadventure.blogspot.com | Duration: 44:13