This is intended to address your question concerning technique. Given your relatively young age and earlier valve repair surgery over 20 yrs ago, I assume you'll go ahead with resection and replacement of aortic valve and aortic root with direct attachment of the right and left main coronary artery origins using a mechanical St. Jude composite valve graft prosthesis (modified Bentall technique). Your surgeon may also assess your ascending aorta and transverse aortic arch to determine whether or not resection and replacement of this portion of your aorta will be necessary to avoid another surgery down the road, say 10 yrs from now. If this becomes necessary, deep hypothermia and circulatory arrest will be required and represents added complexity. It is my sincere hope you find this information useful and your surgery goes extremely well.
After writing this, I reread your post above and realize now your surgery is tomorrow! Just ignore all this....hope you don't read it until after surgery.
All my best,
MrP