For the first time in 37 years, two weeks ago when I received regular dental anesthetic my heart raced and I started having palpitations. It passed of course in a few minutes and when I went in yesterday for a root canal I asked for the anesthetic without epi. The first shot was fine, but the second injection sill caused my heart to pound hard, my chest felt shallow and made me feel a little panicy. It passed and the 3rd injection did the same. The assistant said "we did not give you epi, but that does happen to some people". I do have a history of sinus tachycardia and palpitations, but just had a full cardiac workup in April and he said I was fine just having PACs and they were harmless. Does this anesthetic issue have something to do with heart rate possibly and is it dangerous or just uncomfortable? I also can't understand why the non epi injection caused the same issues and epinephrine. It's never happened until just recently and I've had more than my share of dental work through the years. Nervous to continue with dental work.