again?

Again Abbey had a fast heart-rate today. I took her to emergency when an ice pack on the face didn't work, and they took her right in. This time they got the IV in on the second attempt, which was relieving. Her rate was 270 beats per minute. Fully double what it normally is. Jeesh! It is so unbelievable!
So, they had the IV in and were wrapping gauze around the board on her wrist to keep it from slipping or being pulled, and they had just gotten the scale in to weigh her to determine what her dosage of adenosine would be and she was trying to fill her diaper. Well, the "bearing down" action slowed her heart on its own. It was so weird - everyone moving so fast, and the doctor noticed her monitor as it was going from 60-78 beats per minute. It made its way to 165 and then stayed there for a while. But didn't go higher. We waited on the monitor for 2 hours, then were released to come home.
So now, I am trying to stay awake until her 6:00 dosafe of propranolol. I don't want to be asleep when it is time to give it to her.
I wish I knew what caused her to flip into tachycardia. I wish and hope this is the last time it happens. I am phoning the cardiologist tomorrow - just to be sure that they have us booked into an outpatient clinic time in the next month...I haven't heard from them yet, so I have to follow up.
Twice in this last three weeks is just so not comforting to me. I realized today that if she continues to have this issue past the 6-9 month age, that I could be taking her into emergency to have an IV started when she is Amelia's age. That would be so gross and hard. I am not trying to borrow trouble - I know that is a long time from now, but really. More quickly coming is the time that Greg is in school. Won't that be interesting? He'll be in Moose Jaw all week - and then what do we do? I mean, I know what I will do, I'll take my kids to Tracy's or something, but it is just so difficult. I just love that baby so much, why does this have to be happening?
I am grateful that everyone seems to know what to do about this problem, and I am grateful it is not something worse. I know that sick kids are in families just like ours - but it does make things a bit more stressful.
Okay, I can probably give her meds now, and I am backspacing more than typing, so I am going!