Interpreting the Results of Exercise Stress TestThe endurance of the heart to stress should be adequate for the age and conditioning level. Heart rate increases in proportion to the workload. Abnormal results would be seen in: Irregular heart rhythms (arrhythmias) during exercise Lack of aerobic fitness Coronary heart disease (coronary artery disease), i.e. disease of the heart’s intrinsic blood supply Stress on the heart triggered by exercise ReferenceBraunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 8th ed. Published on Mar 08, 2011Last Updated on Sep 01, 2014