Sally,
I just had a Holter Monitor test. Out of about 196,000 total heartbearts I had 17,000 PVCs over two days. My doctor said it wasn't all that bad, but suggested a beta blocker. I've tried a beta blocker before, for migraine. It slowed down my already fairly low pulse and blood pressure so I wasn't able to function and couldn't do normal activities. I was very tired and dizzy. I also have acid reflux now and beta blockers can aggravate acid reflux.
Soon I'll see a cardiologist who specializes in arrhythmias. I've known people who had more PVCs in 24 hours than your husband, and they've been fine. Hope this helps you.