by NIH/National Heart, Lung and Blood Institute Central Illustration. Credit: Journal of the American College of Cardiology (2018). DOI: 10.1016/j.jacc.2017.11.014If you’ve listened to the radio or opened a webpage in the past year, you may have seen or heard ads promoting lipoprotein(a), or Lp(a), testing to help people identify risks for heart disease. But, what is...