Congratulations to you and to your soon-to-be-ver-r-r-y large wife!
Now, try to not worry too much. That should be simple, right?
The monitoring keeps getting better. The interpretaion of the monitoring keeps getting better. The solutions -- emergency or "normal" -- keep getting better.
My oldest daughter had fraternal twins 3 1/2 years ago. They knew early that the boy had a heart murmur. When he didn't seem to be growing they found that he had the trifecta of heart defects: the atrial septal defect, the ventral septal defect, and patent ductus arteriosus: basically, holes in heart walls where there shouldn't be holes and valves that don't close at birth when they should.
The solution: just remove his little heart, maintain him mechanically while you patch up the aforementioned mechanical issues, then put him back together. Sounds easy,huh?
Since my daughter was living in L.A. at the time, I talked to my own doctor about the prognosis.
His pronouncement: those pediatric specialists and surgeons can walk on water.
Alex is now 3 1/2, bigger than his sister, and as normal a 3-year-old as ever existed -- well, at least in my family.
Best of wishes, good luck, and we'll do our own various forms of prayer for you.