 [ Symptoms ] the is a dark mark and lump on my arm that not a bruise its sort of oval shaped in my armpit area on the backside of my arm its been there for monthsat least 3 now this skin over the lump is darker than the skin surrounding it & smooth idk what to say about the borders because theres really no def border it just looks like a smear of darker color and its not itchyflaky or anything the lump is really firm& isnt malleable i can not move it at all& theres been no pain from it i just need to know if it sounds like something i should get checked out [ Disease ] most helpful answer the answer here is not quite as straightforward as you might think so let me try to explain it is true an ecg does not look inside the body the way an angiogram does however an ecg does trace the heart is electrical conduction system if an artery in the heart has become blocked and caused a portion of the heart muscle to die this can affect the electrical conduction system and that damage in turn would be reflected on an ecg that is probably why your relative is cardiologist is going directly to angioplasty actually the physician likely will perform an angiogram first then do the angioplasty immediately afterwards instead of having to undergo two procedures your relative will only go through one that is healthier in many ways it reduces infection risk and your relative will only have to recover one time instead of two if your relative has any questions about why his or her cardiologist is choosing this particular treatment your relative should speak up every patient has a right to know why a procedure is being performed what the expected outcome is and what the recovery will be like communication is key in getting great medical treatment and sometimes that communication has to start with the patient best wishes to you and your relative