The Impact Of Platelet Function on 1-year Outcome in Complex PCI Patients

Inclusion Criteria: * Documented undergoing complex PCI in 1 year prior to enrollment. Exclusion Criteria: * Presence of any condition/circumstance which in the opinion of the investigator could significantly limit the complete follow up of the patient (e.g. tourist, non-native speaker or does not understand the local language where interpreter services are not reliably available, psychiatric disturbances, alcohol or drug abuse). * Presence of serious/severe co-morbidities in the opinion of the investigator which may limit life expectancy (\<1 year). * Current participation in a blinded randomized clinical trial.