Hey Michael,
First of all,
A scary story indeed, I hope everything works out and your wife makes a full recovery, it sounds very promising though at this early stage.
As for the what if's... I can really sympathise having had a few family disasters and 'nearly's myself, but the good thing is your wifes condition was discovered at the ( possibly wrong ) time but in the right place, onwards and upwards from here mucka..
All the best S&C