This is what is causing your heart rate to go up. However, poor conditioning due to lack of exercise, panic attacks, or a thyroid condition could do the same thing. I think a nerve block would do more harm than good unless you had severe pain as well. Talk with your doctor about your own particular case and see what he thinks. I was wondering if you could give me some more info on it, all I know is that my heart beats too fast.
Heart problems run on both sides of the family.
The main problem with having this in pregnancy is that when the heart beats so fast, there is a chance the baby will not get enough oxygen. You will most likely be given medication to slow your heart down. SVT in itself is not usually inherited. I have Atrial Fibrillation, and one of the drugs I take is Coumadin. I have an appointment for a dental cleaning and have been advised to stop taking the drug for 3 days prior to my visit.