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left arm and chest discomfort/ lite burning

I am 32 yr old female. Smoker for 17 years (non-smoker for 7 months now) Also heavy marijuana smoker for 13 years.(also quit 7months) Currently 40 pounds overweight.
Grandfather died of heart attack. Father had triple by-pass at 42.
For a little over 3 years i get a discomfort in my left arm. It feels like its heavy and I discribe it as" bad blood running through my arm" Its not pain but a weird feeling.  I would get this feeling maybe a couple times a month. It is now happening a couple times a week.
I also get a "lite burning" type of feeling over my left breast. Also a pressure feeling. I take off my bra thinking this would help.
Also i had 2 episodes this week. I was cooking dinner and all of a sudden i started to sweat really bad and get very shaky. I felt like i had to sit down right then. I also felt very weak and lightheaded. NO CHEST PAIN this time.
I had a ekg and a stress test on a treadmill which came back fine 2 years ago.
My question is do these 2 tests tell you all about the heart?? Could there be a problem with the heart that these 2 tests would not detect??
THANK YOU very much for any response.
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237039 tn?1264258057
And to add to the post above, if it's been 2 years, I would think with sympoms like that you should be evaluated again. Take care, Ally
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1685247 tn?1305569485
The EKG is a measure pf the electrical activity of the heart over a period of time, as detected by electrodes attached to the outer surface of the skin. IT can pick up abnormal rhythms of the heart, as well as evidence of an old myocardial infarction, an ongoing myocardial infarction, or active ischemia (restriction in blood supply to the heart). A stress test is a screening test for coronary artery disease. A stress test can show any abnormal blood flow to the heart muscle.

It is very possible for a stress test to be falsely normal in patients with coronary artery disease. If you are concerned about chest pain or discomfort, please discuss with your physician. It sounds as if you have a family history of coronary artery disease. With a normal stress test, the likelihood of coronary artery disease is low, but no screening test is 100% effective in ruling out disease.
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