I have been having left arm pain, from my shoulders and my wrist, and my hearts been beating fast, and then a hard thump, and then stops beating for a second. and the other day i blacked out for a second. heart disease runs in my family as well as cancer. Im 47 , and I weigh 150 lbs, HEIGHT 5--8   IM worried its going to be a heart attack but I have been under alot of stress.
Hello and thank you for using Chat Doctor. I carefully read your question and I understand your concern. I will try to explain you something and give you my opinion. You should know that typical heart pains have some characteristics. They are usually retro-sternal pains likes quizzing, tightness or heaviness. They may irradiate to both arms, neck and jaw. Furthermore, they last from 5 to 20 minutes and in a case of hairy attack may last even more. But you should know that heart attack usually is a Chat Doctor.  So, if you are experiencing chest pain and if heart disease runs in four family than it's time to do some examination. If I was the treating doctor I will recommend an electrocardiogram, a cardiac echo, a full blood analyze, cardiac enzymes, and a street test if it is possible.it might be just an atypical pain caused by stress, but better to be safe. After all this we can judge what we are dealing with. Hope I was helpful. Best regards, 