 In the initial paper, Bruce reported that the test could detect signs of such conditions as angina pectoris, a previous heart attack, or a ventricular aneurysm.Bruce and colleagues also demonstrated that exercise testing was useful in screening apparently healthy people for early signs of coronary artery disease.Typically during a Bruce Protocol, Heart Rate and Rating of Perceived Exertion are taken every minute and Blood Pressure is taken at the end of each stage (every three minutes).