Hello,
These can be hard to work up. The question is what is causing your heart rate to increase -- there are many possibilities. It depends on the circumstances when this happens, how it initiates, how it terminates, among others. This could be inappropriate sinus tach, atrial tachycardia/flutter, and a host of other things. If you already have a recorded copy of the rhythm, I do not think a reveal will help.
As to whether or not it is safe, it depends on how long you are in the tachycardia. If it is intermittent, it will not cause any harm. You need a diagnosis. If this is inappropriate sinus tachycardia, a beta blocker is a reasonable medication to try. If you have symptoms with beta blockers, a calcium channel blocker is an alternative.
I hope this helps.
Thanks for posting.