Pharmacodynamic Effect of Clopidogrel in Patients Undergoing Transcatheter Aortic Valve Implantation

The aim of this study was to analyze periprocedural and mid-term effect of clopidogrel on platelet function using the VerifyNow P2Y12 point-of-care assay in patients undergoing TAVI. Platelet reactivity was measured at the beginning of the procedure after 300 mg clopidogrel bolus administration and during the follow-up (at 1 month after the procedure) in 52 patients undergoing TAVI using the Medtronic CoreValve prosthesis (Medtronic CoreValve). A cutoff value of 240 PRU was used to identify nonresponders to clopidogrel treatment with high residual platelet reactivity (HRPR). Baseline HRPR was identified in 80% of patients and in 72% of patients during 6-month follow-up. There was no significant difference in the pharmacodynamic effects of clopidogrel on platelet reactivity from baseline to 6-months follow-up (297±57 vs. 275±62; P=0.058). Ischemic event occurred only in 3 patients (5.8%) from the study group. In conclusion, majority of patients undergoing TAVI had high residual platelet reactivity after pretreatment with 300 mg of clopidogrel and during the 6-month follow-up at dual antiplatelet treatment. The noneffectiveness of clopidogrel in the TAVI population raises the question of the routine use of dual antiplatelet treatment in this setting

Editor's Choice-2017 ESC Guidelines on the Diagnosis and Treatment of Peripheral Arterial Diseases, in collaboration with the European Society for Vascular Surgery (ESVS)

Document covering atherosclerotic disease of extracranial carotid and vertebral, mesenteric, renal, upper and lower extremity arteries Endorsed by: the European Stroke Organization (ESO) The Task Force for the Diagnosis and Treatment of Peripheral Arterial Diseases of the European Society of Cardiology (ESC) and of the European Society for Vascular Surgery (ESVS) Authors/Task Force Members (a), Victor Aboyans (*), Jean- Baptiste Ricco (*), Marie- Louise E. L. Bartelink, Martin Bjorck, Marianne Brodmann, Tina Cohnert, Jean-Philippe Collet, Martin Czerny, Marco De Carlo, Sebastian Debus, Christine Espinola-Klein, Thomas Kahan, Serge Kownator, Lucia Mazzolai, A. Ross Naylor, Marco Roffi, Joachim Rother, Muriel Sprynger, Michal Tendera, Gunnar Tepe, Maarit Venermo, Charalambos Vlachopoulos, Ileana Desormais Document Reviewers (b), Petr Widimsky, Philippe Kolh, Stefan Agewall, Hector Bueno, Antonio Coca, Gert J. De Borst, Victoria Delgado, Florian Dick, Cetin Erol, Marc Ferrini, Stavros Kakkos, Hugo A. Katus, Juhani Knuuti, Jes Lindholt, Heinrich Mattle, Piotr Pieniazek, Massimo Francesco Piepoli, Dierk Scheinert, Horst Sievert, Iain Simpson, Jakub Sulzenko, Juan Tamargo, Lale Tokgozoglu, Adam Torbicki, Nikolaos Tsakountakis, Jose Tunon, Melina Vega de Ceniga, Stephan Windecker, Jose Luis ZamoranoPeer reviewe

Questions and answers on diagnosis and management of patients with Peripheral Arterial Diseases:A companion document of the 2017 ESC Guidelines for the Diagnosis and Treatment of Peripheral Arterial Diseases, in collaboration with the European Society for Vascular Surgery (ESVS)

International audienc

2017 ESC Guidelines on the Diagnosis and Treatment of Peripheral Arterial Diseases, in collaboration with the European Society for Vascular Surgery (ESVS)

International audienc