I am new to the board. I am 6 months pregnant and have developed constant pvc's. I will go into a bigeminy rythmn for hours at a time without a break. This last most days all day long, every day. I have had a work up by a cardiologist, holter, echo, stress test etc and all was found to be fine. The holter recorded 2000+ pvc's in 24 hours. I also get very breathless when they come in runs like that. I have had blood tests for everything that could cause it, nothing was found to be wrong. My question is, is this normal during pregnany? The card. says it could just be from that, pregnancy. Needless to say it is causing me a great deal of anxiety, which doesn't help. It is all I can focus on. The card. suggested going on a low dose beta blocker for the remainder of my pregnancy. Does anyone have any experience with this? Did you get any side effects from the beta blocker? How long did it take to begin working? Did it really help? SOrry for all of the questions, but I am freaking out. I have to do something because I feel like I am losing control.