Aspirin and clopidogrel are important components of medical therapy for patients with acute coronary syndromes, for those who received coronary artery stents and in the secondary prevention of ischaemic stroke. Despit...Aspirin and clopidogrel are important components of medical therapy for patients with acute coronary syndromes, for those who received coronary artery stents and in the secondary prevention of ischaemic stroke. Despite their use, a significant number of patients experience recurrent adverse ischaemic events. Interindividual variability of platelet aggregation in response to these antiplatelet agents may be an explanation for some of these recurrent events, and small trials have linked "aspirin and/or clopidogrel resistance", as measured by platelet function tests, to adverse events. We systematically reviewed all available evidence on the prevalence of aspirin/clopidogrel resistance, their possible risk factors and their association with clinical outcomes. We also identified articles showing possible treatments. After analyzing the data on different laboratory methods, we found that aspirin/clopidogrel resistance seems to be associated with poor clinical outcomes and there is currently no standardized or widely accepted definition of clopidogrel resistance. Therefore, we conclude that specific treatment recommendations are not established for patients who exhibit high platelet reactivity during aspirin/clopidogrel therapy or who have poor platelet inhibition by clopidogrel.展开更多
Background Despite outstanding antiplatelet properties of aspirin and clopidogrel, some patients taking these drugs continue to suffer complications. Antiplatelet resistance appears to be a new prognostic factor in ac...Background Despite outstanding antiplatelet properties of aspirin and clopidogrel, some patients taking these drugs continue to suffer complications. Antiplatelet resistance appears to be a new prognostic factor in acute coronary syndrome patients for clinical events associated with stent thrombosis （ST）. However, there is no optimal method to identify it and assess its correlation to clinical outcomes. This study sought to evaluate the predictive value of antiplatelet resistance assessed by whole blood impedance aggregometry for the risk of early ST in patients with acute coronary syndrome who underwent coronary stenting. Methods Platelet responses to aspirin and clopidogrel in 86 patients with acute coronary syndrome were measured by whole blood impedance aggregometry. Spontaneous platelet aggregation was defined as antiplatelet resistance identified by the increased electrical impedance. The clinical endpoint was early stent thrombosis during 30-day follow-up after coronary stenting. Results The prevalence of aspirin resistance, clopidogrel resistance and dual resistance of combined clopidogrel and aspirin resistance were 19.8%, 12.8% and 5.8% respectively. Diabetes, female and higher platelet counts were more frequently detected in clopidogrel-resistant and dual-resistant patients. During 30-day follow-up, the patients with clopidogrel resistance and dual resistance had higher incidence of early stent thrombosis （18.2% vs. 1.3%, 40.0% vs. 1.2%, P 〈0.05）. Binary Logistic Regression analysis indicated that dual resistance remained an independent predicator for early stent thrombosis （odds ratio 34.064, 95% CI 1.919-604.656, P=-0.016）. Conclusions Antiplatelet resistance assessed by whole blood impedance aggregometry is paralleled to clinical events, and dual antiplatelet resistance is an independent predicator for early stent thrombosis in patients with acute coronary syndrome. As a physiological assessment of platelet reactivity, whole blood impedance aggregometry is a convenient and accurate opt展开更多
目的探讨血小板活化标志物、维生素D与缺血性脑卒中患者抗血小板药物抵抗的相关性。方法 2017年6月至2018年6月,190例接受阿司匹林和氯吡格雷联合治疗的缺血性脑卒中患者,于用药后7～10 d检测二磷酸腺苷(ADP)和花生四烯酸(AA)诱导的最...目的探讨血小板活化标志物、维生素D与缺血性脑卒中患者抗血小板药物抵抗的相关性。方法 2017年6月至2018年6月,190例接受阿司匹林和氯吡格雷联合治疗的缺血性脑卒中患者,于用药后7～10 d检测二磷酸腺苷(ADP)和花生四烯酸(AA)诱导的最大血小板聚集率(MPAR)、血小板CD_(62p)活化百分率、血浆P选择素和维生素D。根据MPAR将患者分为抗血小板药物抵抗组和敏感组。结果阿司匹林抵抗率为1.2%,氯吡格雷抵抗率24.7%(抵抗组47例,敏感组143例)。抵抗组血小板CD_(62p)活化百分率(t=-5.232, P <0.001)、高血压患病率(χ~2=4.878, P <0.05)均高于敏感组,维生素D浓度明显低于敏感组(t=3.052, P <0.01),两组血浆P选择素浓度无显著性差异(t=-0.684, P=0.253)。Logistic回归分析结果显示,高血压(OR=5.538, 95%CI:1.204～25.470, P <0.05)、血小板CD62P活化百分率(OR=1.082,95%CI:1.041～1.092, P <0.05)是氯吡格雷抵抗的危险因素,而维生素D (OR=0.848, 95%CI:0.755～0.953,P <0.01)是氯吡格雷抵抗的保护因素。结论抑制血小板活化和补充维生素D可能有助于提高氯吡格雷的疗效。展开更多
基金Supported by The University of Pecs (PTE AOK KA-34039-16/2009)
文摘Aspirin and clopidogrel are important components of medical therapy for patients with acute coronary syndromes, for those who received coronary artery stents and in the secondary prevention of ischaemic stroke. Despite their use, a significant number of patients experience recurrent adverse ischaemic events. Interindividual variability of platelet aggregation in response to these antiplatelet agents may be an explanation for some of these recurrent events, and small trials have linked "aspirin and/or clopidogrel resistance", as measured by platelet function tests, to adverse events. We systematically reviewed all available evidence on the prevalence of aspirin/clopidogrel resistance, their possible risk factors and their association with clinical outcomes. We also identified articles showing possible treatments. After analyzing the data on different laboratory methods, we found that aspirin/clopidogrel resistance seems to be associated with poor clinical outcomes and there is currently no standardized or widely accepted definition of clopidogrel resistance. Therefore, we conclude that specific treatment recommendations are not established for patients who exhibit high platelet reactivity during aspirin/clopidogrel therapy or who have poor platelet inhibition by clopidogrel.
文摘Background Despite outstanding antiplatelet properties of aspirin and clopidogrel, some patients taking these drugs continue to suffer complications. Antiplatelet resistance appears to be a new prognostic factor in acute coronary syndrome patients for clinical events associated with stent thrombosis （ST）. However, there is no optimal method to identify it and assess its correlation to clinical outcomes. This study sought to evaluate the predictive value of antiplatelet resistance assessed by whole blood impedance aggregometry for the risk of early ST in patients with acute coronary syndrome who underwent coronary stenting. Methods Platelet responses to aspirin and clopidogrel in 86 patients with acute coronary syndrome were measured by whole blood impedance aggregometry. Spontaneous platelet aggregation was defined as antiplatelet resistance identified by the increased electrical impedance. The clinical endpoint was early stent thrombosis during 30-day follow-up after coronary stenting. Results The prevalence of aspirin resistance, clopidogrel resistance and dual resistance of combined clopidogrel and aspirin resistance were 19.8%, 12.8% and 5.8% respectively. Diabetes, female and higher platelet counts were more frequently detected in clopidogrel-resistant and dual-resistant patients. During 30-day follow-up, the patients with clopidogrel resistance and dual resistance had higher incidence of early stent thrombosis （18.2% vs. 1.3%, 40.0% vs. 1.2%, P 〈0.05）. Binary Logistic Regression analysis indicated that dual resistance remained an independent predicator for early stent thrombosis （odds ratio 34.064, 95% CI 1.919-604.656, P=-0.016）. Conclusions Antiplatelet resistance assessed by whole blood impedance aggregometry is paralleled to clinical events, and dual antiplatelet resistance is an independent predicator for early stent thrombosis in patients with acute coronary syndrome. As a physiological assessment of platelet reactivity, whole blood impedance aggregometry is a convenient and accurate opt
文摘目的探讨血小板活化标志物、维生素D与缺血性脑卒中患者抗血小板药物抵抗的相关性。方法 2017年6月至2018年6月,190例接受阿司匹林和氯吡格雷联合治疗的缺血性脑卒中患者,于用药后7～10 d检测二磷酸腺苷(ADP)和花生四烯酸(AA)诱导的最大血小板聚集率(MPAR)、血小板CD_(62p)活化百分率、血浆P选择素和维生素D。根据MPAR将患者分为抗血小板药物抵抗组和敏感组。结果阿司匹林抵抗率为1.2%,氯吡格雷抵抗率24.7%(抵抗组47例,敏感组143例)。抵抗组血小板CD_(62p)活化百分率(t=-5.232, P <0.001)、高血压患病率(χ~2=4.878, P <0.05)均高于敏感组,维生素D浓度明显低于敏感组(t=3.052, P <0.01),两组血浆P选择素浓度无显著性差异(t=-0.684, P=0.253)。Logistic回归分析结果显示,高血压(OR=5.538, 95%CI:1.204～25.470, P <0.05)、血小板CD62P活化百分率(OR=1.082,95%CI:1.041～1.092, P <0.05)是氯吡格雷抵抗的危险因素,而维生素D (OR=0.848, 95%CI:0.755～0.953,P <0.01)是氯吡格雷抵抗的保护因素。结论抑制血小板活化和补充维生素D可能有助于提高氯吡格雷的疗效。
