Thank you James for sharing the details of your age and the bypass surgery. I had bypass surgery three years ago and it is encouraging to find someone that has gone so long before another bypass. Did you do anything special other than diet and exercise to reach this milestone. Good luck with you surgery.
When possible, I definitely favor arterial grafts over vein grafts, especially in young patients such as yourself. If your surgeon can use the arteries form your chest wall, that would be terrific. In general, the arteries last much longer than the veins (although you actually seem to have done well with the veins).