background: activated normal platelets undergo many biochemical and morphological changes, some of which are apoptotic. platelet derived microparticles and shrinked platelets as hallmark of platelet activation and apoptosis disperse surfaces containing procoagulant activity around injured vessels and tissues. this study was conducted to determine microparticles formation and platelet shrinkage ...

OBJECTIVE We reviewed the literature and performed a meta-analysis comparing the safety and efficacy of adjunctive use of reduced-dose thrombolytics and glycoprotein (Gp) IIbIIIa inhibitors to the sole use of Gp IIbIIIa inhibitors before percutaneous coronary intervention (PCI) in patients presenting with acute ST-segment elevation myocardial infarction (STEMI). BACKGROUND Early reperfusion i...

BACKGROUND A 75 year old patient presenting with mucocutaneous bleeding was diagnosed with acquired thrombasthenia. The diagnosis was based on lack of platelet aggregation with adenosine diphosphate (ADP), arachidonic acid and collagen, and normal aggregation induced by ristocetin. OBJECTIVE To study the mechanism of platelet function inhibition in a patient with acquired thrombasthenia. ME...

Evaluation of: Sanchez, P, Gimeno F, Ancillo P et al.: Role of the paclitaxel-eluting stent and tirofiban in patients with ST elevation myocardial infarction undergoing postfibrinolysis angioplasty (GRACIA 3 Trial). Circ. Cardiovasc. Interv. 3, 297–307 (2010). In ST elevation myocardial infarction patients presenting to nonpercutaneous coronary intervention (PCI)-capable hospitals, a pharmacoin...

Plasma and platelet factor Va represent different substrates for activated protein C (APC). In this study, we have measured platelet-dependent APC resistance and the effect of aspirin and a platelet glycoprotein IIbIIIa antagonist (GR144053F) on this phenomenon. In platelet rich plasma (PRP), progressive APC resistance was observed with increasing platelet activation. APC sensitivity ratios of ...

Plasma and platelet factor Va represent different substrates for activated protein C (APC). In this study, we have measured platelet-dependent APC resistance and the effect of aspirin and a platelet glycoprotein IIbIIIa antagonist (GR144053F) on this phenomenon. In platelet rich plasma (PRP), progressive APC resistance was observed with increasing platelet activation. APC sensitivity ratios of ...

Immune thrombocytopenia (ITP) is an autoimmune disease with a complex heterogeneous pathogenesis and a bleeding phenotype that is not necessarily correlated to platelet count. In this study, the platelet function was assessed in a well-defined cohort of 33 pediatric chronic ITP patients. Because regular platelet function test cannot be performed in patients with low platelet counts, 2 new assay...

The reperfusion era has dramatically and irrevocably transformed the management of ST-segment elevation myocardial infarction (STEMI). For the patient treated with fibrinolysis as the initial reperfusion strategy, subsequent options which are the subject of some controversy and the focus of this review are (i) facilitated percutaneous coronary intervention (PCI); (ii) pharmacoinvasive approach;...

The contemporary management of patients with ST-segment elevation myocardial infarction (STEMI) involves a series of timely decisions, including the primary reperfusion strategy and a triage and transfer strategy for patients presenting to a facility not capable of percutaneous coronary intervention (PCI). Even for PCI-eligible patients presenting to a PCI-capable hospital, there are a myriad o...