New research shows how doctors can improve the timing of surgery for some heart attack patients by analyzing the levels of a particular protein. Troponin is a protein involved in muscle contraction that is released into the bloodstream after a heart attack. Clinicians use troponin levels, along with other tests, to determine whether a patient is having a heart attack and to decide on treatment options such as coronary artery bypass graft (CABG) surgery. In the study, researchers found that some patients who have lower levels of troponin would benefit from having earlier surgery. However, the researchers show that patients...