I think she meant a second opinion about cycling and being on Warfarin.
You are going to get the party line on that. My DH felt comfortable doing exactly what he had been doing before while taking Plavix, with the exceeption of the mountain biking like a crazy person. He also found a cardiologist for a second opinion on things in general, that was a specialist in working with people who do endurance sports. It is so opposite of what cardiologists usually see, it is hard to find someone who will understand. I would be more concerned that your DH has been cleared to resume endurance activities, or at least building up to his former level.