I'm not familiar wth Troponin and I'm not a medical person. I agree that a visit with a cardiologist is a good idea. The kardia mobile device is also an excellent suggestion. I had palpitations off and on for a long time. I told my dr. and she sent me for a variety of tests: ekg, echo cardiogram, stress echo, etc. I was even given a halter monitor to wear. All came back normal. Problem was I wouldn't have symptoms while I was being tested. I got a kardia mobile and used it when I did have symptoms. The result said atrial fibrillation or afib. I was not convinced yet every time I had symptoms I got the afib result. I saved the results and printed out several. My primary care Dr. referred me to a cardiologist who looked at the print outs and evaluated my symptoms. She diagnosed me with afib and I was referred to an electrophysiologist who prescribed medication. It's now under control. Obviously, this is no substitute for seeing a medical professional. I wish you well.