I had a complete pec tear in 98. You MUST go see the very best sports doc that you can find. My first doc, said I would heal naturally. After a year, I finally went to someone that knew what the hell they were talking about. This is a miserable injury that will only get worse the longer you wait. My doc said that had it been repaired immediately, I would not have missed a beat.
A tendon type repair is repairable. WIth my injury, I also blew out half of my bicep, the pec tendon was re-attached by drilling holes in the bone and tying the tendon back down. I still have not been able to get the hole in my bicep to recover. Muscle to tendon repairs are almost impossible to surgically repair because when they stich the muscle back together, the stiches can tear again. SInce myinitial tear, I have also had 2 other tears, both muscle to tendon typ. One was surgically repaired, only to tear again.
Again....GO SEE THE BEST DOC YOU CAN FIND ! This is not a really common or often seen injury so it might take you some time to find a good doc. If you're anywhere near FL, I can send you to my doc.
Good luck
BPP