Is there a big difference between cardiologists and electrophysiologists?

As some of you know I’ve been having heart palpitations for over a year and can’t really afford a bunch of visits to the doctor. I’ve been diagnosed with benign PVC but it is so annoying because it’s ALL day and affects me causing dizzy spells accompanied with nausea and short breath sometimes. I even had blood work done yesterday and everything was FINE.

I finally found out about HCAP where I could apply for government assistance and they’re willing to assist me 100% for any health issues for a few months. I’m so excited and happy that I can finally see doctors for other issues. I’m long over due for a visit for a woman’s exam, I have back issues from a car accident, and now I can get to the bottom of my heart “issue”! I’m going to find an electrophysiologist ASAP.

Anyways, what can an electrophysiologist do that a cardiologist can’t? I’ve been on beta blockers to help the palpitations but no use and they made me feel like a zombie and always wanting to pass out. I don’t know what else to do or what else is causing my dizzy spells and my PVC but I assume they are related because on the forums many people have these symptoms!