<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am a 35 yo female with a 4 month history of CP with SOA. I have had a Nuclear Stress test and an Echo, all which were normal. However, they did find that I have a Left Bundle Branch Block. I wore a 30 day halter monitor which revealed PVCsPACs, but not much else. I had the same chest pain last night above my left breast, with shortness of breath, and left arm numbness. After an hour I went to the ER. The normal tests were ordered, but the ER doctor also ordered a D-Dimer, and mine was elevated to 0.65. All other lab tests were WNL. She ordered a CT Angio of my chest whicChatDoctore back normal. She didnt explain what could cause the elevated D-Dimer, nor whether or not I should be concerned, or what I should do about it. I am on Metoprolol and Lisinopril for my heart.  <response>: Brief Answer:The most serious health problems that may increase D-Dimer levels are excluded, and the increase is not significant. Check the D- Dimer level after 1 week. Detailed Answer:Hello, Thank you for using Chat Doctor. I read your question carefully, and I think you dont have to be worried because in your case, the most serious health problems that may increase D-Dimer levels are excluded. As your cardiac enzymes and your ECG did not show any new modifications this means that you were not suffering a myocardium infarction. Anglo CT of the chest is the gold standard for diagnosing pulmonary thromboembolism, which in your case came out to be normal. Also, the rise of the D-Dimer level is not so significant to indicate serious diseases. A venous thromboembolism VOTE is also a cause of high D-Dimer levels, but it can be excluded by the lack of symptoms suggestive for it and low increase of D- Dimer level. Is Usually significant for levels above 1A more possible cause in your case may be a systemic disease such as dermatological disease or infection. Eventhough, what to do next ? If I were your doctor, I should advise you to check D-Dimer level in blood after 1 week. Hope this is helpful. Let me know if you need more clarifications. Otherwise, please close and rate the answer. Kind 