@bbisno Please do keep "bugging" them because the squeaky wheel gets the grease. The BNP measures a protein which is related - do NOT panic here - to heart failure. Troponin is another protein that often measures as abnormal. That's a part of heart disease and many of us have been living happy and productive and rewarding lives doing all kinds of things we love to do keeping our limitations in mind. As I promised, now that I am home, here are two links where you can learn about this test. https://www.mayocliniclabs.com/test-catalog/overview/83873 and https://www.mayoclinic.org/diseases-conditions/heart-disease/in-depth/heart-disease/art-20049357. What were your "red flags" that prompted you to see cardiac care? Have you been diagnosed with a specific heart disease? Are your cardiologists affiliated with a COE (Center of Excellence)?