Help! Breath Holding

[ebhappydc]

Hi,
I have a 12 month dcg set to start in 2 weeks so i sent mom a touch base email yesterday about this and that. They are a lovely family from what i can tell, but in her reply she mentioned the following:

' one thing to be aware of that has come up in the last month is that she seems to be breath holding while crying to the point where she faints for 5 seconds. it seems to happen when she's tired, and less than once a week....taken her to doctor and they are going to run a few tests just to be sure, but they weren't too concerned...we blow gently on her face and that sometimes seems to get her to take a breath. '

Has anyone dealt with this at all? I've heard of older children being angry and holding their breath, but a baby doing this, I'm not familiar with. I've read online that it's not very common and is involuntary. Child goes limp/ turns blue until they breathe again. .... Sounds like oxygen deprivation which scares me quite a bit. Would you be able to deal with this? When one faints, do they always automatically start breathing again? This actually has me very concerned now and i'm not sure i'm able to deal with this happening, even if it's just a few times per month. What if she's standing having an episode and then falls while fainting? Am i being too worried? Would you take her on and wait and see?
if fatigue is a factor i can only see that getting worse at daycare - and then if she experiences this at nap time when crying, how would i know? I do check on child every time they cry for the first little while, but eventually i hope they can self-soothe and i wouldn't necessarily check on every cry.

Would you be comfortable?

Update - I just received another email from mom that so far her daughter has not turned blue... she writes: 'she doesn't turn blue and she hasn't fallen from an upright position yet. She's usually on the floor or being held by one of us (because if it's going to happen it's going to happen while she's crying hard). Her eyes roll and it's literally only 5 seconds if that. It was frightening the first time for us, but the doctor's response (after listening to her heart etc) was to say "Some kids do this, she'll grow out of it". She's been left with grandparents and a babysitter a few times and they have never experienced it. It's been four times in the last six weeks so not often at all.
They are going to run a few tests just to be absolutely sure, but it's been three weeks and after leaving two messages they haven't gotten back to us yet. I will let you know ‎if anything else develops."

uggh... hard to know what to do