I developed SVT's during my first pregnancy approximately 15 years (1990) ago. I did not have any episodes during my 2nd (2000) and 3rd (2002) pregnancies. I have had episodes between pregnancies and since I was pregnant - usually due to too much caffeine, too much alcohol, stress, being in a smoke filled room (I'm a non-smoker) and for no real reason at all.
michelle,
thanks for the post.
If you were having persistant and uncontrolled episodes of the SVT then it could cause some cardiac damage. Some people have recurrence of symptoms during subsequent pregancies.
I would discuss this with your cardiologist and OB-GYN to come up with a plan to use safe medications and management. If you continue to have episodes after your preganacy or off medications an ablation may be an alternative method for controlling the rhythm.
good luck