Sounds like you are connected to the best advice available, a cardiologist and lots of tests.
Metoprolol is also prescribed for HBP, so you are getting two treatments for HBP... hope that has you BP down to a good range.
Others may be able to come up with more comforting words than my opening statement, I hope so as most of us who have heart rhythm problems need to know that these are usually benign and while they cause us concern, they are not likely to do us any additional harm... than the discomfort.
Also forgot to mention that my most recent EKG a couple of weeks ago shows Non-Specific ST Abnormality but the cardiologist didn't seem to be concerned about this either. What does this mean?