This week we review a recent Australian prospective assessment of aspirin resistance in children undergoing heart surgery. How common is this seen in this patient group and what are the reasons? What is the best test to perform to assess this and what tests may not be worthwile? Who deserves 'routine' testing for this possible problem? Cardiovascular surgeon Dr. Supreet Marathe of Queensland Children's Hospital in Brisbane, Australia shares the results of this recent publication.