<s>[INST] Does an ECG show up any potential heart problems. I had one last week for ectopic beats I've been getting as a part of anxiety and it came back normal. I have had 3 in the last 8 years all normal. I had a weird sensation in my chest almost like my heart bubbled or flip flopped whilst I was vivid dreaming. Wondering whether I should be comforted by the recent ecg and its scaring me and making my anxiety worse. [/INST] Ecg is the representation of your heart activity for that 30 seconds.  Like all test it helps us detect many problems of your heart,  however like other test it's not always true. If at all you want to investigate for ectopic beats consider below. I'd the symptoms do occur every day,  get a 24 hour holter.  If they are very rare once in a month or so and troublesome, a event recorder is a better investigation ..  Before you embark of such a tedious job let me assure that 85% population has at some point of time in life ectopic s,  however most 99% of there are benign and not relevant clinically so you should be worried it there are no associated symptoms Regards Dr.  Priyank Mody </s>