1
|
Xie HG, Jiang LP, Tai T, Ji JZ, Mi QY. The Complement System and C4b-Binding Protein: A Focus on the Promise of C4BPα as a Biomarker to Predict Clopidogrel Resistance. Mol Diagn Ther 2024; 28:189-199. [PMID: 38261250 DOI: 10.1007/s40291-023-00691-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2023] [Indexed: 01/24/2024]
Abstract
The complement system plays a dual role in the body, either as a first-line defense barrier when balanced between activation and inhibition or as a potential driver of complement-associated injury or diseases when unbalanced or over-activated. C4b-binding protein (C4BP) was the first circulating complement regulatory protein identified and it functions as an important complement inhibitor. C4BP can suppress the over-activation of complement components and prevent the complement system from attacking the host cells through the binding of complement cleavage products C4b and C3b, working in concert as a cofactor for factor I in the degradation of C4b and C3b, and consequently preventing or reducing the assembly of C3 convertase and C5 convertase, respectively. C4BP, particularly C4BP α-chain (C4BPα), exerts its unique inhibitory effects on complement activation and opsonization, systemic inflammation, and platelet activation and aggregation. It has long been acknowledged that crosstalk or interplay exists between the complement system and platelets. Our unpublished preliminary data suggest that circulating C4BPα exerts its antiplatelet effects through inhibition of both complement activity levels and complement-induced platelet reactivity. Plasma C4BPα levels appear to be significantly higher in patients sensitive to, rather than resistant to, clopidogrel, and we suggest that a plasma C4BPα measurement could be used to predict clopidogrel resistance in the clinical settings.
Collapse
Affiliation(s)
- Hong-Guang Xie
- Division of Clinical Pharmacology, General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, 210006, China.
| | - Li-Ping Jiang
- Division of Clinical Pharmacology, General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, 210006, China
| | - Ting Tai
- Division of Clinical Pharmacology, General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, 210006, China
| | - Jin-Zi Ji
- Division of Clinical Pharmacology, General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, 210006, China
| | - Qiong-Yu Mi
- Division of Clinical Pharmacology, General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, 68 Changle Road, Nanjing, 210006, China
| |
Collapse
|
2
|
Comanici M, Bhudia SK, Marczin N, Raja SG. Antiplatelet Resistance in Patients Who Underwent Coronary Artery Bypass Grafting: A Systematic Review and Meta-Analysis. Am J Cardiol 2023; 206:191-199. [PMID: 37708750 DOI: 10.1016/j.amjcard.2023.08.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 08/14/2023] [Indexed: 09/16/2023]
Abstract
Antiplatelet therapy (APT) with aspirin and a P2Y12 inhibitor is commonly given to patients who underwent coronary artery bypass grafting (CABG) to reduce thrombotic events. APT resistance, the inadequate antiplatelet effect of these drugs, is a growing concern. This review aimed to assess APT resistance prevalence in patients who underwent CABG and its impact on clinical outcomes. We conducted a comprehensive search for relevant studies published to date. The included studies measured platelet function through laboratory assays and reported on clinical outcomes in patients who underwent CABG. The primary outcomes were major adverse cardiovascular events (MACEs) and mortality, whereas the secondary outcomes included acute coronary syndrome (ACS), stroke, and thromboembolic events. The meta-analysis used random-effects models, with heterogeneity assessed using the I2 statistic. The initial search identified 45 studies, with 11 meeting the inclusion criteria, involving 3,122 patients. The overall prevalence of APT resistance in patients who underwent CABG was 39%. Patients with APT resistance had significantly higher risks of MACEs and death (odds ratio [OR] 1.73, 95% confidence interval [CI] 1.06 to 2.83, p = 0.03) and postoperative myocardial infarction (OR 2.25, 95% CI 1.13 to 4.48, p = 0.02) than those without resistance. However, no significant association was found between APT resistance and stroke (OR 2.25, 95% CI 0.80 to 6.35, p = 0.12) or other thromboembolic events (OR 1.72, 95% CI 0.72 to 4.08, p = 0.22). In conclusion, APT resistance is prevalent in a significant proportion of patients who underwent CABG, increasing the risk of MACEs and postoperative myocardial infarction. These findings emphasize the need for further research to develop tailored antiplatelet strategies in this patient population.
Collapse
Affiliation(s)
- Maria Comanici
- Department of Cardiac Surgery, Harefield Hospital, London, United Kingdom.
| | - Sunil K Bhudia
- Department of Cardiac Surgery, Harefield Hospital, London, United Kingdom
| | - Nandor Marczin
- Department of Anaesthesia & Critical Care, Harefield Hospital, London, United Kingdom
| | - Shahzad G Raja
- Department of Cardiac Surgery, Harefield Hospital, London, United Kingdom
| |
Collapse
|
3
|
Zhang Y, Fan D, Qiao S, Hu H. Verifynow P2Y 12 PRU-Guided Modification of Clopidogrel for Prevention of Recurrent Ischemic Stroke: A Real-World Prospective Cohort Study. Neurol Ther 2022; 11:1749-1766. [PMID: 36163415 DOI: 10.1007/s40120-022-00406-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 09/01/2022] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION Clopidogrel resistance causes recurrent stroke. However, outcomes of modified antiplatelet medications to prevent recurrent ischemic stroke are not well known. METHODS Patients who received clopidogrel with and without modification as initial treatment for stroke were recruited and compared. The primary outcome was ischemic stroke and myocardial infarction at the 1-year follow-up. The secondary outcome was bleeding complications. RESULTS Overall, 206 patients treated with clopidogrel were enrolled and were divided into the modification (n = 39) and no modification (n = 167) groups. There was a significant difference in the incidence of severe cerebral arterial stenosis between the two groups (modification group, 16/39, 41.03%; no modification group, 36/167, 21.56%, P = 0.012) at baseline. The loss to follow-up rate was 12.14% (25/206). After adjustment for severe cerebral artery stenosis, antiplatelet modification based on the platelet reactivity unit (PRU) value significantly improved in the per protocol set (odds ratio 0.142, 95% confidential interval 0.022-0.898, P = 0.038). The area under the curve of the different PRU cutoff values were 0.630, 0.605, and 0.591 (P = 0.016, 0.051, and 0.092) for PRU 190, 208, and 235, respectively. CONCLUSION Verifynow P2Y12 PRU-guided modification of clopidogrel for ischemic stroke significantly improved or prevented recurrence at the 1-year follow-up. Our findings suggest that clopidogrel therapy based on the PRU cutoff value of 190 should be considered to improve outcomes. TRIAL REGISTRATION ClinicalTrials.gov NCT02618265 (December 1, 2015).
Collapse
Affiliation(s)
- Yuanjin Zhang
- Department of Neurology, Peking University Third Hospital, 49th North Garden Road, Haidian District, Beijing, 100191, China
| | - Dongsheng Fan
- Department of Neurology, Peking University Third Hospital, 49th North Garden Road, Haidian District, Beijing, 100191, China.
| | - Shudong Qiao
- Department of Neurology, Peking University Shougang Hospital, Beijing, China
| | - Hongtao Hu
- Department of Neurology, Beijing Jishuitan Hospital Hui Longguan Branch, Beijing, China
| |
Collapse
|
4
|
Shimizu T, Naito I, Miyamoto N, Aihara M, Asakura K, Yoshimoto Y. Long-Term Durability and Recurrence Patterns After Endovascular Treatment for Basilar Tip Aneurysms. World Neurosurg 2022; 163:e482-e492. [PMID: 35398572 DOI: 10.1016/j.wneu.2022.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/02/2022] [Accepted: 04/04/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND Treating recurrence after coil embolization of basilar tip aneurysm remains challenging even with the development of endovascular procedures. The present study evaluated long-term durability and recurrence patterns after endovascular treatment of basilar tip aneurysms. METHODS Data of 116 consecutive patients treated with endovascular therapy at 3 regional hospitals from 2002-2019 were retrospectively analyzed. Aneurysms were ruptured in 51 cases and unruptured in 65 cases, with a mean maximal diameter of 7.8 mm (>15 mm in 14 patients) and a mean follow-up period of 5.8 ± 4.3 years. RESULTS Recurrence was observed in 24 of the 116 patients (21%), and 14 patients were retreated. The 5-year recurrence-free survival rate was 75.3%. Cox proportional hazards analysis found that recurrence correlated significantly with maximal aneurysm diameter >10 mm (P = 0.001; hazard ratio: 3.95, 95% confidence interval: 1.76-8.90) and incomplete occlusion (P = 0.003; hazard ratio: 4.43, 95% confidence interval: 1.63-12.00). Recurrence pattern was classified into 3 types: neck type (9 patients), regrowth type (10 patients), and regrowth type of initially thrombosed aneurysms (3 patients). Rerupture occurred in neck type with de novo aneurysm formation adjacent to the neck (n = 3) and regrowth type with dome filling (n = 4). CONCLUSIONS Recurrence after coil embolization for basilar tip aneurysms is associated with large aneurysms and incomplete occlusion at initial embolization. Understanding the patterns of recurrence is useful for predicting recurrence and selecting treatment strategies.
Collapse
Affiliation(s)
- Tatsuya Shimizu
- Department of Neurosurgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan.
| | - Isao Naito
- Department of Neurosurgery, Geriatrics Research Institute and Hospital, Maebashi, Gunma, Japan
| | - Naoko Miyamoto
- Department of Neurosurgery, Geriatrics Research Institute and Hospital, Maebashi, Gunma, Japan
| | - Masanori Aihara
- Department of Neurosurgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Ken Asakura
- Department of Neurosurgery, Japanese Red Cross Maebashi Hospital, Maebashi, Gunma, Japan
| | - Yuhei Yoshimoto
- Department of Neurosurgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| |
Collapse
|
5
|
Camargo LM, Lima PCTM, Janot K, Maldonado IL. Safety of Oral P2Y12 Inhibitors in Interventional Neuroradiology: Current Status and Perspectives. AJNR Am J Neuroradiol 2021; 42:2119-2126. [PMID: 34674995 DOI: 10.3174/ajnr.a7303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 07/22/2021] [Indexed: 11/07/2022]
Abstract
In the field of interventional neuroradiology, antiplatelet agents are commonly used to prepare patients before the implantation of permanent endovascular materials. Among the available drugs, clopidogrel is the most frequently used one, but resistance phenomena are considered to be relatively common. Prasugrel and ticagrelor were recently added to the pharmacologic arsenal, but the safety of these agents in patients undergoing neurointerventional procedures is still a subject of discussion. The cumulative experience with both drugs is less extensive than that with clopidogrel, and the experience with patients in the neurology field is less extensive than in the cardiology domain. In the present article, we provide a narrative review of studies that investigated safety issues of oral P2Y12 inhibitors in interventional neuroradiology and discuss potential routes for future research.
Collapse
Affiliation(s)
- L M Camargo
- From the Faculdade de Medicina (L.M.C.), Universidade Salvador, Salvador, Brazil
| | - P C T M Lima
- Serviço de Clínica Médica (P.C.T.M.L.), Hospital Santo Antônio, Associação Obras Sociais Irmã Dulce, Salvador, Brazil
| | - K Janot
- Service de Neuroradiologie (K.J.), Centre Hospitalier Régional Universitaire de Tours, Tours, France
| | - I L Maldonado
- U1253, iBrain (I.L.M.), Université de Tours, Institut National de la Santé et de la Recherche Médicale, Tours, France
| |
Collapse
|
6
|
Cheng Y, Shao T, Huang L, Xu H, Shao P, Yang D, Ge W, Xu Y, Zhang M. Platelet Function Tests Predicting the Efficacy and Safety of Aspirin Secondary Prevention. Neurol Res 2021; 44:291-298. [PMID: 34581662 DOI: 10.1080/01616412.2021.1981103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To precisely prevent stroke, we evaluated three platelet function tests and their associations with clinical outcomes in ischemic stroke patients. METHODS On-treatment platelet reactivity of acute minor stroke patients taking aspirin plus clopidogrel was tested by light transmittance aggregometry (LTA), thromboelastography (TEG) and platelet function analyzer (PFA). Mann-Whitney U tests and receiver operating characteristic (ROC) curve analysis were used to assess their associations with recurrent events and clinical outcome prediction. RESULTS 127 acute minor stroke patients were stringently selected and followed for 13 months. Eight patients (6.3%) self-reported the recurrence and 13 (10.2%) patients self-reported bleeding. Recurrent patients displayed significantly higher on-treatment platelet reactivity when measured with LTA (p = 0.030) and PFA (p < 0.001). Further ROC analysis demonstrated that LTA and PFA had modest-to-fair ability to predict stroke recurrence (LTA: area under the curve [AUC], 0.765; 95% CI, 0.584-0.945, PFA: AUC, 0.832; 95% CI, 0.658-1.000). However, TEG (measured by the platelet inhibition rate) could not detect the difference between recurrent patients and non-recurrent patients (p = 0.515) and predict recurrent events (AUC, 0.569; 95% CI, 0.368-0.770). None of the tests were associated with bleeding except for PFA (p < 0.001), with AUC of PFA reaching 0.772 (0.726-0.818). CONCLUSIONS Of the three tests assessed, the predictive accuracies of PFA and LTA were satisfying for aspirin secondary prevention, while TEG's performance was poor. Only PFA could provide accurate prognostic information for bleeding.
Collapse
Affiliation(s)
- Yue Cheng
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| | - Tengfei Shao
- Department of Pharmacy, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Medical Center for Clinical Pharmacy, Nanjing, China
| | - Lili Huang
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| | - Hengheng Xu
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| | - Pengfei Shao
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| | - Dan Yang
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| | - Weihong Ge
- Department of Pharmacy, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Medical Center for Clinical Pharmacy, Nanjing, China
| | - Yun Xu
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| | - Meijuan Zhang
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Nanjing Neurology Clinic Medical Center, Nanjing, China.,Institute of Brain Science, Nanjing University, Nanjing, China
| |
Collapse
|
7
|
Hummel T, Meves SH, Breuer-Kaiser A, Düsterwald JO, Mühlberger D, Mumme A, Neubauer H. [Evaluation of treatment adaptation for low response to ASA in vascular surgery]. Chirurg 2021; 92:640-646. [PMID: 32945920 PMCID: PMC8484201 DOI: 10.1007/s00104-020-01280-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hintergrund Eine verminderte antithrombozytäre Prophylaxe („Low-Response [LR]“/„high on-treatment platelet reactivity [HPR]“) mit Acetylsalicylsäure (ASS) ist mit einem erhöhten Risiko für thrombembolische Ereignisse assoziiert. Die Prävalenz einer Low-Response ist mit ca. 20 % häufig und ein Therapieregime wurde bisher noch nicht etabliert. Das Ziel dieser prospektiven Studie war es, die Effektivität eines Therapieschemas zur Therapieanpassung bei detektierter LR/HPR bei gefäßchirurgischen Patienten zu evaluieren. Methodik Insgesamt wurden 36 gefäßchirurgischen Patienten mit einer antithrombozytären Dauermedikation mit ASS 100 mg/Tag und einer nachgewiesenen ASS-Low-Response (ALR) in die Studie eingeschlossen. Entsprechend dem festgelegten Therapieplan wurde bei diesen Patienten eine Therapieanpassung durchgeführt und eine Kontrollaggregometrie zur Erfolgskontrolle durchgeführt. Das verwendete Therapieschema folgte dem Test-and-treat-Prinzip. Zur Beurteilung der Wirkung von ASS diente die Impedanzaggregometrie mittels Mehrelektrodenaggregometer (Multiplate). Ergebnisse Insgesamt konnten alle 36 Patienten erfolgreich in eine Response überführt werden. Bei 32 (88,89 %) Patienten erfolgte eine Dosiserhöhung auf 300 mg ASS, 2 (5,56 %) Patienten wurden von ASS auf Clopidogrel umgestellt. Bei weiteren 2 (5,56 %) Patienten wurde auf eine orale Antikoagulation mit Phenprocoumon aufgrund anderer Indikationen umgestellt. Blutungskomplikationen oder Nebenwirkungen traten nicht auf. Schlussfolgerung Das gewählte Therapieschema zur Behandlung einer Low-Response erwies sich als effektiv und sicher bei gefäßchirurgischen Patienten. Überwiegend führte eine leitliniengerechte Dosiserhöhung der Prophylaxe von 100 mg auf 300 mg ASS zu einer effektiven Thrombozytenaggregationshemmung in der Aggregometrie.
Collapse
Affiliation(s)
- T Hummel
- Klinik für Gefäßchirurgie, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland.
| | - S H Meves
- Klinik für Neurologie, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland
| | - A Breuer-Kaiser
- Klinik für Anästhesiologie und Intensivmedizin, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland
| | - J O Düsterwald
- Klinik für Gefäßchirurgie, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland
| | - D Mühlberger
- Klinik für Gefäßchirurgie, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland
| | - A Mumme
- Klinik für Gefäßchirurgie, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland
| | - H Neubauer
- Klinik für Kardiologie, St. Josef Hospital, Ruhr-Universität Bochum, Gudrunstraße 56, 44791, Bochum, Deutschland
| |
Collapse
|
8
|
Poredos P, Antignani PL, Blinc A, Fras Z, Jezovnik MK, Fareed J, Mansilha A. Do we have a unified consensus on antithrombotic management of PAD? INT ANGIOL 2021; 40:229-239. [PMID: 33739074 DOI: 10.23736/s0392-9590.21.04597-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Peripheral artery disease (PAD) is one of the most frequent manifestations of atherosclerosis with high rates of morbidity and mortality. Platelets and coagulation are involved in the progression of atherosclerosis and thromboembolic complications. PAD patients have increased prothrombotic potential, which includes platelet hyperaggregability and increased pro-coagulant state. Therefore, antithrombotic treatment is of utmost importance for the prevention of cardiovascular events in this group of patients. Aspirin is the basic antiplatelet drug, but with limited efficacy in PAD. In contrast to coronary artery disease, its effect on the prevention of cardiovascular events in PAD has been limited proven. Particularly in asymptomatic PAD, there is no evidence for risk reduction with aspirin. Clopidogrel and ticagrelor are more effective than aspirin. Clopidogrel is thus an effective alternative to aspirin for prevention of cardiovascular events in symptomatic PAD. In patients who are non-responders to clopidogrel, ticagrelor is indicated. Dual antiplatelet treatment (DAPT) with aspirin and ticagrelor in patients with coronary artery disease and concomitant PAD significantly decreased the rate of major adverse cardiovascular events, including adverse limb events. However, in the CHARISMA Trial, aspirin and clopidogrel were not more effective than aspirin alone and increased bleeding complications. Therefore, DAPT seems effective only in PAD accompanied by coronary artery disease. Anticoagulant treatment for symptomatic PAD with vitamin K antagonists alone or in combination with aspirin is not more effective than single antiplatelet treatment but increases the rate of major bleeding. Low dose rivaroxaban combined with aspirin in PAD patients significantly reduces cardiovascular events, including limb-threatening ischemia and limb amputations. Anticoagulation and antiplatelet treatment after percutaneous or surgical revascularization of PAD improve the patency of treated vessels. Aspirin with or without dipyridamole improved patency of infra-inguinal by-pass grafts at one year. The combination of clopidogrel with aspirin was more effective than aspirin alone in the prevention of prosthetic graft occlusions in patients undergoing below-knee by-pass-grafting. Oral vitamin K antagonists were not more effective than aspirin in the prevention of infra-inguinal by-pass occlusion. The combination of low dose rivaroxaban and aspirin was effective in preventing major adverse cardiovascular events and adverse limb events after infrainguinal endovascular or surgical revascularization in patients with intermittent claudication. However, the data on antithrombotic treatment after revascularization for limb-threatening ischemia is scanty and inconclusive. In conclusion: Antithrombotic treatment of PAD is a cornerstone for the management of these patients. Antiplatelet drugs prevent the initiation and progression of atherosclerosis and are effective also in the prevention of thromboembolic events. Simultaneous use of antiplatelet and anticoagulation drugs is accompanied by an increased risk of bleeding. However, combined treatment with aspirin and low-dose rivaroxaban is more effective than single antithrombotic treatment and safer than full-dose combined treatment.
Collapse
Affiliation(s)
- Pavel Poredos
- Department of Vascular Disease, University Medical Center Ljubljana, Ljubljana, Slovenia
| | | | - Ales Blinc
- Department of Vascular Disease, University Medical Center Ljubljana, Ljubljana, Slovenia
| | - Zlatko Fras
- Department of Vascular Disease, University Medical Center Ljubljana, Ljubljana, Slovenia
| | - Mateja K Jezovnik
- Department of Advanced Cardiopulmonary Therapies and Transplantation, Health Science Center, University of Texas, Houston, TX, USA
| | - Jawed Fareed
- Loyola University Medical Center, Maywood, IL, USA
| | - Armando Mansilha
- Department of Angiology and Vascular Surgery, Hospital CUF Porto, Porto, Portugal
| |
Collapse
|
9
|
Hummel T, Meves SH, Breuer-Kaiser A, Düsterwald JO, Mühlberger D, Mumme A, Neubauer H. Perioperative changes of response to antiplatelet medication in vascular surgery patients. PLoS One 2020; 15:e0244330. [PMID: 33373378 PMCID: PMC7771706 DOI: 10.1371/journal.pone.0244330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 12/07/2020] [Indexed: 12/24/2022] Open
Abstract
Introduction Reduced antiplatelet activity of aspirin (ALR) or clopidogrel (CLR) is associated with an increased risk of thromboembolic events. The reported prevalence data for low-responders vary widely and there have been few investigations in vascular surgery patients even though they are at high risk for thromb-embolic complications. The aim of this prospective observational monocentric study was to elucidate possible changes in ALR or CLR after common vascular procedures. Methods Activity of aspirin and clopidogrel was measured by impedance aggregometry using a multiple electrode aggregometer (Multiplate®). Possible risk factors for ALR or CLR were identified by demographical, clinical data and laboratory parameters. In addition, a follow-up aggregometry was performed after completion of the vascular procedure to identify changes in antiplatelet response. Results A total of 176 patients taking antiplatelet medications aspirin and/or clopidogrel with peripheral artery disease (PAD) and/or carotid stenosis (CS) were included in the study. The prevalence of ALR was 13.1% and the prevalence of CLR was 32% in the aggregometry before vascular treatment. Potential risk factors identified in the aspirin group were concomitant insulin medication (p = 0.0006) and elevated C-reactive protein (CRP) (p = 0.0021). The overall ALR increased significantly postoperatively to 27.5% (p = 0.0006); however, there was no significant change in CLR that was detected. In a subgroup analysis elevation of the platelet count was associated with a post-procedure increase of ALR incidence. Conclusion The incidence of ALR in vascular surgery patients increases after vascular procedures. An elevated platelet count was detected as a risk factor. Further studies are necessary to analyse this potential influence on patency rates of vascular reconstructions.
Collapse
Affiliation(s)
- Thomas Hummel
- Department of Vascular Surgery, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
- * E-mail:
| | - Saskia Hannah Meves
- Department of Neurology, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
| | - Andreas Breuer-Kaiser
- Department of Anaesthesiology, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
| | - Jan-Ole Düsterwald
- Department of Vascular Surgery, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
| | - Dominic Mühlberger
- Department of Vascular Surgery, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
| | - Achim Mumme
- Department of Vascular Surgery, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
| | - Horst Neubauer
- Department of Cardiology, St. Josef Hospital, Katholisches Klinikum Bochum, Ruhr University Bochum, Bochum, Germany
| |
Collapse
|
10
|
Ostrowska M, Kubica J, Adamski P, Kubica A, Eyileten C, Postula M, Toma A, Hengstenberg C, Siller-Matula JM. Stratified Approaches to Antiplatelet Therapies Based on Platelet Reactivity Testing. Front Cardiovasc Med 2019; 6:176. [PMID: 31850373 PMCID: PMC6901499 DOI: 10.3389/fcvm.2019.00176] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 11/14/2019] [Indexed: 01/17/2023] Open
Abstract
Antiplatelet therapy with P2Y12 receptor inhibitors (clopidogrel, prasugrel, ticagrelor, cangrelor) is a cornerstone of medical therapy after percutaneous coronary interventions. Significant prevalence of high on-treatment platelet reactivity (HTPR) on clopidogrel treatment led to introduction of more potent P2Y12 inhibitors: prasugrel (a third generation thienopyridine), ticagrelor, and cangrelor (cyclopentyl-triazolo-pyrimidines). Nevertheless, more potent platelet inhibition and resulting low on-treatment platelet reactivity (LTPR) has led to increased risk of major bleeding events. These limitations resulted in a need for an individualized antiplatelet therapy approach. This review discusses the current role and future perspectives of diagnostic tools such as platelet function testing to optimize antiplatelet therapy with a focus on deescalating therapies to reduce bleeding risks.
Collapse
Affiliation(s)
- Małgorzata Ostrowska
- Department of Cardiology and Internal Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Jacek Kubica
- Department of Cardiology and Internal Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Piotr Adamski
- Department of Cardiology and Internal Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Aldona Kubica
- Department of Health Promotion, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Ceren Eyileten
- Department of Experimental and Clinical Pharmacology, Centre for Preclinical Research and Technology (CEPT), Medical University of Warsaw, Warsaw, Poland
| | - Marek Postula
- Department of Experimental and Clinical Pharmacology, Centre for Preclinical Research and Technology (CEPT), Medical University of Warsaw, Warsaw, Poland
| | - Aurel Toma
- Department of Cardiology, Medical University of Vienna, Vienna, Austria
| | | | - Jolanta M Siller-Matula
- Department of Experimental and Clinical Pharmacology, Centre for Preclinical Research and Technology (CEPT), Medical University of Warsaw, Warsaw, Poland.,Department of Cardiology, Medical University of Vienna, Vienna, Austria
| |
Collapse
|
11
|
Dracoulakis MDA, Gurbel P, Cattaneo M, Martins HS, Nicolau JC, Kalil Filho R. High Residual Platelet Reactivity during Aspirin Therapy in Patients with Non-St Segment Elevation Acute Coronary Syndrome: Comparison Between Initial and Late Phases. Arq Bras Cardiol 2019; 113:357-363. [PMID: 31432979 PMCID: PMC6882399 DOI: 10.5935/abc.20190146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 12/19/2018] [Indexed: 12/15/2022] Open
Abstract
Background High platelet reactivity (HPR) during therapy with acetylsalicylic acid (ASA)
is a poor prognostic factor in acute coronary syndromes (ACS). The
prevalence of HPR during ACS is greater than that reported in stable
diseases. However, it is unclear whether this prevalence of HPR is a
transient phenomenon or a characteristic of this high-risk population. Objective The main objective is to compare the effects of ASA on platelet function in
the initial and late phases of ACS in a single population. Secondary
objectives are: correlation between the tests between themselves and the
relationship between the tests and the variation of the inflammatory markers
(C-reactive protein and interleukin-6). Methods Seventy patients with non-ST segment elevation (NSTE) ACS in use of 100-200
mg of ASA per day for at least 7 days were prospectively studied. Platelet
function was assessed in the first 48 hours and subsequently after 3 months
using four methods: VerifyNow™ (VFN), whole blood platelet
aggregation (WBPA) with arachidonic acid (AA) and collagen as agonists, and
platelet function analyzer (PFA). The level of statistical significance
considered was < 0.05. Results According to the more specific methods (WBPA with AA and VFN), the incidence
of HPR was significantly higher in the early phase than in the late phase:
WBPA with AA: 31% versus 13%, p = 0.015; VFN: 32% versus 16%, p = 0.049. The
other methods tested, which were less specific for ASA, did not show
significant differences between phases. The correlation between the methods
was weak or moderate (r ranging from 0.3 to 0.5, p < 0.05), and there
were no significant associations between HPR and inflammatory markers. Conclusion The prevalence of HPR during AAS therapy, assessed by specific methods for
cyclooxygenase 1 (COX-1), is higher during the acute phase than in the late
phase of NSTE ACS.
Collapse
Affiliation(s)
| | - Paul Gurbel
- Sinai Hospital of Baltimore - Sinai Center for Thrombosis Research, Baltimore - EUA
| | - Marco Cattaneo
- Universita Degli Studi Di Milano - Unita di Medicina III, Milão - Itália
| | - Herlon Saraiva Martins
- Universidade de São Paulo - Faculdade de Medicina Hospital das Clínicas, São Paulo, SP - Brazil
| | - José Carlos Nicolau
- Universidade de São Paulo - Faculdade de Medicina Hospital das Clínicas, São Paulo, SP - Brazil
| | - Roberto Kalil Filho
- Universidade de São Paulo - Faculdade de Medicina Hospital das Clínicas, São Paulo, SP - Brazil
| |
Collapse
|
12
|
Comparison of the Thrombogenicity of a Bare and Antithrombogenic Coated Flow Diverter in an In Vitro Flow Model. Cardiovasc Intervent Radiol 2019; 43:140-146. [PMID: 31410532 PMCID: PMC6940313 DOI: 10.1007/s00270-019-02307-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 08/05/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Dual antiplatelet therapy is a pre-requisite for flow diverter (FD) implantation. The purpose of this study was to assess the thrombogenicity of the p48 FD, coated with the newly developed phenox Hydrophilic Polymer Coating (p48_HPC, phenox GmbH, Germany) in comparison with uncoated p48 FDs in an in vitro flow model (Chandler Loop). METHODS p48 and p48_HPC FDs were implanted into silicon tubes filled with whole human blood and incubated at 37 °C under pulsating flow. After 120 min, platelet count was determined in the blood. Platelet activation markers (PAR1) and formation of microparticles were analyzed in a flow cytometer. Fluorescence microscopy of CD42a positive cells and scanning electron microscopy was used to detect adherent platelets on the wire surface. RESULTS Platelets in contact with the uncoated p48 FDs are significantly more activated than those incubated with p48_HPC (73 ± 9% vs. 65 ± 6%, p < 0.05) and release more microparticles (1.8 ± 0.5 vs. 1.4 ± 0.4, p < 0.05). The platelet count after 120-min circulation in the Chandler Loop was significantly lower for the uncoated p48 compared to the p48_HPC indicating significantly greater adherence of the platelets to the p48 (71 ± 8% vs. 87 ± 5%, p < 0.05). SEM and fluorescent antibody imaging revealed minimal platelet adherence to the surface of the p48_HPC compared to the uncoated p48. CONCLUSION The pHPC coating significantly reduces thrombogenicity of the p48 FD. This may help to reduce the risk of thromboembolic complications when using these devices. A reduction in antiplatelet therapy may be possible.
Collapse
|
13
|
De Lorenzo A, Dutra M, Mattos MD, Rey H, Tibirica E. Evaluation of platelet activity by multiple electrode impedance aggregometry in acute coronary syndromes: pilot study in a Brazilian tertiary-care public hospital. Braz J Med Biol Res 2019; 52:e8001. [PMID: 30652826 PMCID: PMC6328968 DOI: 10.1590/1414-431x20188001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/07/2018] [Indexed: 11/22/2022] Open
Abstract
There is no definite recommendation for testing platelet aggregation (PA) in acute coronary syndromes (ACS) due to inconclusive evidence on the usefulness of platelet function tests to guide therapy and improve clinical outcomes. The evaluation of PA with multiple electrode impedance platelet aggregometry (MEA) may be useful to manage antiplatelet therapy and possibly influence patient outcome. The primary aim of this study was to measure PA with MEA in Brazilian patients with ACS and evaluate the association between PA and adverse clinical outcomes. Forty-seven consecutive patients admitted with ACS to a Brazilian tertiary-care public hospital were studied and PA was evaluated using MEA. Patients were followed for six months for the occurrence of all-cause death, acute myocardial infarction, or stroke. Suboptimal inhibition of PA was found in 7 patients (14.9%); 5 (10.6%) in response to ASA (acetylsalicylic acid), 2 (5.0%) to clopidogrel, and none to ticagrelor. Inadequate PA inhibition in response to ASA was significantly associated with the composite end point, but there was no significant association for insufficient PA inhibition in response to clopidogrel. This study suggested that the evaluation of PA in ACS using MEA may identify non-responders to ASA. Larger studies are necessary to define, in a public health scenario, the value of MEA in the management of ACS.
Collapse
|
14
|
Florczak AS, Henni S, Signolet I, Hamel JF, Humeau-Heurtier A, Rousseau P, Abraham P. Vasodilator response to galvanic current stimulation of the skin accurately detects acetylsalicylic acid intake: A study in 400 vascular patients. Atherosclerosis 2018; 270:139-145. [DOI: 10.1016/j.atherosclerosis.2018.01.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 12/19/2017] [Accepted: 01/24/2018] [Indexed: 12/12/2022]
|
15
|
Hartinger J, Novotny R, Bilkova J, Kvasnicka T, Mitas P, Sima M, Hlubocky J, Kvasnicka J, Slanar O, Lindner J. Role of Dipyrone in the High On-Treatment Platelet Reactivity amongst Acetylsalicylic Acid-Treated Patients Undergoing Peripheral Artery Revascularisation. Med Princ Pract 2018; 27:356-361. [PMID: 29754149 PMCID: PMC6167732 DOI: 10.1159/000489970] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 05/13/2018] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVE To evaluate the effects of dipyrone on sensitivity to aspirin (acetylsalicylic acid [ASA]) in patients who underwent peripheral artery vascular reconstruction. SUBJECTS AND METHODS Impedance aggregometry and light transmission aggregometry were used to determine the effects of dipyrone on ASA treatment in 21 patients. Blood samples were drawn in a 7-day period after the surgery. The cut-off value for high on-treatment platelet reactivity (HTPR) was set at < 65% of aggregation inhibition for impedance aggregometry. For light transmission aggregometry the cut-off value for arachidonic acid-induced aggregation was set at > 20% of aggregating platelets, and the cut-off value for epinephrine-induced aggregation was > 44% of aggregating platelets. The cut-off value for each method was derived from a large number of patients treated with a daily dose of 100 mg of ASA. RESULTS We found HTPR in 14 (67%) of the 21 patients. None had primary resistance to ASA, i.e., after the addition of ASA in vitro all samples showed antiplatelet efficacy. Regression analysis showed a possible correlation between lower efficacy of ASA treatment and higher daily doses of dipyrone (p = 0.005 for impedance aggregometry, p = 0.04 for light transmission aggregometry), higher platelet count (p = 0.005 for impedance aggregometry), and shorter time from surgery (p = 0.03 for impedance aggregometry). CONCLUSION HTPR occurs in 67% of ASA-treated patients after lower limb vascular surgery. The occurrence of HTPR correlates with the daily dose of dipyrone. Therefore, dipyrone should not be used as a postoperative analgesic in ASA-treated patients after peripheral artery revascularisation due to its influence on the effectiveness of ASA.
Collapse
Affiliation(s)
- Jan Hartinger
- Department of Clinical Pharmacology and Pharmacy, Institute of Pharmacology, General University Hospital and 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - Robert Novotny
- Transplant Surgery Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- *Robert Novotny, Transplant Surgery Department, Institute for Clinical and Experimental Medicine, Videnska 1958/9, CZ-140 21 Prague 4 (Czech Republic), E-Mail
| | - Jana Bilkova
- Thrombotic Centre, General University Hospital, Prague, Czech Republic
| | - Tomas Kvasnicka
- Thrombotic Centre, General University Hospital, Prague, Czech Republic
| | - Petr Mitas
- 2nd Department of Cardiovascular Surgery, General University Hospital and 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - Martin Sima
- Department of Clinical Pharmacology and Pharmacy, Institute of Pharmacology, General University Hospital and 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - Jaroslav Hlubocky
- 2nd Department of Cardiovascular Surgery, General University Hospital and 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - Jan Kvasnicka
- Thrombotic Centre, General University Hospital, Prague, Czech Republic
| | - Ondrej Slanar
- Department of Clinical Pharmacology and Pharmacy, Institute of Pharmacology, General University Hospital and 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - Jaroslav Lindner
- 2nd Department of Cardiovascular Surgery, General University Hospital and 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| |
Collapse
|
16
|
GENETIC FEATURES OF RESISTANCE TO ANTITHROMBOCYTIC DRUGS IN PATIENTS WITH ISCHEMIC HEART DISEASE AFTER CONDUCTED PERCUTANEOUS CORONARY INTERVENTION. EUREKA: HEALTH SCIENCES 2017. [DOI: 10.21303/2504-5679.2017.00490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The aim of the study: To study and evaluate platelets aggregation activity as primary phase of haemostasis and anti-platelet therapy in IHD patients after PCI, depending on the polymorphism of the gene ITGA 2 - C 807T.
Materials and methods: 54 patients who were on a treatment at the clinical hospital "Feofaniya" (Kyiv) and at the Kyiv Clinical Hospital on railway transport №2 were examined: 20 women and 34 men (mean age - 67.8 ± 7.46 years). The study involved patients with stable forms of coronary artery disease (stable angina pectoris II-III) and acute coronary syndrome, with a history of percutaneous coronary intervention (PCI). All patients received antiplatelet therapy: acetylsalicylic acid (3.7%), clopidogrel (9.3%) or a combination of them (87%).
Functional activity of the platelets was studied on a Biola Aggregation Analyzer laser agrometer. The response to antiplatelet therapy was confirmed by the Aggredyne test. The polymorphism of the C807T of the ITGA2 gene was determined by polymerase chain reaction (PCR).
Based on the results of the aggregation ability, antiplatelet therapy sensitivity, the patients were divided into two groups: group I - individuals with varying degrees of insensitivity to antiplatelet drugs (35 patients), group II - susceptible to treatment (19 patients). In each group was analyzed the polymorphism of the gene ITGA2 and features of the functional activity of the platelets, depending on the genotype.
Results: In 50% of patients receiving ASA there was a different degree of non-sensitivity, with respect to thienopyridines - this figure was 20%. Among patients who received dual antiplatelet therapy did not match at least one of the drugs - 83.3%. Among the "non responders" 78.9% had a mutated T-allele, and a homozygous variant for the T allele was recorded in 53.15% of patients, while "respondents" - 15.8%. Most in the group of "respondents" was the group of the native genotype - C / C. The most pronounced tendency to influence the genotype on spontaneous aggregation was observed in relation to the T-allele, in particular in the homozygote (genotype T / T). The significant difference between the groups was obtained from the platelet response to ADP. Thus, the reaction of carriers in the T-allele, as homo- and heterozygotes, was significantly different.
Conclusions: In 64.8% of patients with coronary heart disease after PCI was observed a decrease in antiplatelet sensitivity, which has a clear link with the polymorphism of the gene ITGA 2. The presence of the T-allele in the genotype of patients with IHD is associated with a less adequate platelet response in patients receiving dual antiplatelet therapy for ASA and thienopyridines on ADP, which may have an effect on the sensitivity to thienopyridines.
Collapse
|
17
|
Franken C, Kaiser A, Krüger J, Overbeck K, Mügge A, Neubauer H. Cytochrome P450 2B6 and 2C9 genotype polymorphism – a possible cause of prasugrel low responsiveness. Thromb Haemost 2017; 110:131-40. [DOI: 10.1160/th13-01-0021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 04/04/2013] [Indexed: 01/17/2023]
Abstract
SummaryThe cytochrome P450 (CYP) isoenzymes are essential for the metabolic activation of the prodrug prasugrel. Little is known about the impact of polymorphism of these isoenzymes on the prevalence of prasugrel low responsiveness (PLR) in patients with coronary artery disease. We investigated the frequency of PLR and the question whether PLR is associated with decreased/non-function polymorphisms of the CYP isoenzymes (2C9*2, 2C9*3, 2C19*2, 2C19*3, and 2B6*6). Our study included 355 patients who underwent percutaneous coronary stenting. The patients were initially treated with either prasugrel (n=90; 60/10 mg: loading/daily maintenance dose) or 600/75 mg clopidogrel hydrogensulfate (n=265) in combination with 500/100 mg acetylsalicylic acid (ASA). Platelet function was tested by impedance aggregometry 48 hours after taking the loading dose. Prasugrel achieved on the average significantly higher levels of platelet inhibition as compared to clopidogrel (mean 27.3 U vs 41.2 U). The frequencies of low response for prasugrel, clopidogrel and ASA were 9.8%, 35.1% and 14.9%, respectively. We identified only body mass index to be associated with PLR. PLR was not caused by a loss of ADP P2Y12-receptor function. Half of the patients with PLR were carriers of the reducedfunction allele CYP2B6*6, and 41.7% had the genetic variant CYP2C9*2. The allele CYP2C9*3 was detected in three patients with PLR (25%) and two patients with PLR (16.7%) carried the gene variant CYP2C19*2. In conclusion, the rate of low responders was significantly lower among patients treated with prasugrel than with clopidogrel. PLR are more often carriers of CYP2C9*2 (50% in PLR) than when compared to the prevalence described in literature. Also, there is a trend to an increased frequency of CYP2B6*6 in PLR. In conclusion, CYP2B6 and CYP2C9 polymorphisms seem to be associated with prasugrel low-response.
Collapse
|
18
|
Trenk D, Schrör K, Gawaz M, Kristensen SD, Storey RF, Huber K, Siller-Matula JM. How to improve the concept of individualised antiplatelet therapy with P2Y12 receptor inhibitors – is an algorithm the answer? Thromb Haemost 2017; 113:37-52. [DOI: 10.1160/th14-03-0238] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Accepted: 07/22/2014] [Indexed: 01/03/2023]
Abstract
SummaryWithin the past decade, high on-treatment platelet reactivity (HTPR) on clopidogrel and its clinical implications have been frequently discussed. Although it has been previously assumed that HTPR is a phenomenon occurring only in patients treated with clopidogrel, recent data show that HTPR might also occur during treatment with prasugrel or ticagrelor in the acute phase of ST-elevation myocardial infarction. Moreover, it has been postulated that there is a therapeutic window for P2Y12 receptor blockers, thus indicating that HTPR is associated with thrombotic events whereas low on-treatment platelet reactivity (LTPR) is associated with bleeding events. The current paper focuses on tools to identify risk factors for HTPR (pharmacogenomic testing, clinical scoring and drug-drug interactions) and on the use of platelet function testing in order to identify patients who might not respond adequately to clopidogrel. The majority of recent clinical randomised trials have not supported the hypothesis that platelet function testing and tailored antiplatelet therapy are providing a favourable clinical outcome. These trials, mainly performed in low-to-moderate risk patients, will be reviewed and discussed. Finally, an algorithm based on current knowledge is suggested, which might be of use for design of clinical trials.
Collapse
|
19
|
Labruyère C, Reny JL, Chapelle C, Piot M, Fontana P, Gris JC, Delavenne X, Mismetti P, Laporte S, Mallouk N. Prevalence of poor biological response to clopidogrel. Thromb Haemost 2017; 107:494-506. [DOI: 10.1160/th11-03-0202] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Accepted: 12/14/2011] [Indexed: 12/28/2022]
Abstract
SummaryThe existence of poor biological response to clopidogrel has been shown in some patients. Despite the increasing number of studies, this phenomenon remains difficult to quantify. We performed a systematic review to estimate the prevalence of poor biological response to clopidogrel and investigate the factors known to modulate this. An exhaustive search was performed. Altogether 171 publications were identified, providing data for a total of 45,664 subjects. The estimated prevalence of poor biological response to clopidogrel ranged from 15.9% to 49.5% according to the platelet function assay employed. The assays most frequently used were light transmittance aggregometry (LTA), the vasodilator-stimulated phosphoprotein (VASP) assay and the Verify -now® assay. For all these assays, higher cut-off values were associated with a lower prevalence of poor biological response to clopidogrel. However, when choosing a fixed cut-off point for each assay, the prevalence of poor biological response to clopidogrel was highly variable suggesting that other factors could modulate poor biological response to clopidogrel. Finally, none of the studied factors could apparently explain the variability of poor biological response to clopidogrel. This meta-analysis shows that the prevalence of poor biological response depends on the assay employed, the cut-off value and on various unidentified additional factors.
Collapse
|
20
|
Schoergenhofer C, Hobl EL, Schwameis M, Gelbenegger G, Staudinger T, Heinz G, Speidl WS, Zauner C, Reiter B, Lang I, Jilma B. Acetylsalicylic acid in critically ill patients: a cross-sectional and a randomized trial. Eur J Clin Invest 2017; 47:504-512. [PMID: 28556061 PMCID: PMC5519937 DOI: 10.1111/eci.12771] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 05/23/2017] [Indexed: 01/31/2023]
Abstract
BACKGROUND Despite decades of clinical use, the pharmacokinetics and the effects of acetylsalicylic acid (ASA) in critically ill patients remain ill-defined. We aimed to investigate the pharmacokinetics and the effects of different ASA formulations during critical illness. DESIGN A cross-sectional study and a randomized, parallel-group trial were performed. Critically ill patients under chronic oral ASA treatment (100 mg enteric-coated) were screened for high 'on-treatment' platelet reactivity (HTPR) according to arachidonic acid-induced whole-blood aggregometry. Thirty patients with HTPR were randomized to receive 100 mg ASA intravenously, 100 mg enteric-coated ASA bid (bis in die) or 81 mg chewable ASA (n = 10 per group). Serum thromboxane B2 (TXB2) levels, ASA and salicylic acid levels were quantified. RESULTS Of 66 patients, 85% (95% confidence intervals 74-93%) had HTPR. Compared to baseline infusion of 100 mg, ASA significantly reduced platelet aggregation after 24 h to median 80% (Quartiles: 66-84%). Intake of 81 mg chewable ASA significantly reduced platelet aggregation to 75% (54-86%) after four hours, but increased it to 117% after 24 h (81-163%). Treatment with 100 mg enteric-coated ASA bid decreased platelet aggregation after 24 h to median 56% (52-113%). Baseline TXB2 levels were median 0·35 ng/mL (0·07-0·94). Infusion of ASA or intake of 100 mg ASA bid reduced TXB2 levels to 0·07-0·18 ng/mL after 24 h, respectively. Chewable ASA reduced TXB2 levels only transiently. Pharmacokinetic analysis revealed highly variable absorption patterns of oral ASA formulations. CONCLUSION There is a very high prevalence of HTPR in critically ill patients on peroral ASA therapy, caused by an incomplete suppression of TXB2 and/or by impaired absorption of ASA.
Collapse
Affiliation(s)
| | - Eva-Luise Hobl
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Michael Schwameis
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Georg Gelbenegger
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Thomas Staudinger
- Department of Internal Medicine I Oncology & Hematology, Medical University of Vienna, Vienna, Austria
| | - Gottfried Heinz
- Department of Internal Medicine II Cardiology, Medical University of Vienna, Vienna, Austria
| | - Walter S Speidl
- Department of Internal Medicine II Cardiology, Medical University of Vienna, Vienna, Austria
| | - Christian Zauner
- Department of Internal Medicine III Gastroenterology & Hepatology, Medical University of Vienna, Vienna, Austria
| | - Birgit Reiter
- Clinical Institute of Laboratory Medicine, Forensic Toxicology Unit, Medical University of Vienna, Vienna, Austria
| | - Irene Lang
- Department of Internal Medicine II Cardiology, Medical University of Vienna, Vienna, Austria
| | - Bernd Jilma
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| |
Collapse
|
21
|
Comparison of Immature Platelet Count to Established Predictors of Platelet Reactivity During Thienopyridine Therapy. J Am Coll Cardiol 2017; 68:286-293. [PMID: 27417007 DOI: 10.1016/j.jacc.2016.04.056] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/22/2016] [Accepted: 04/12/2016] [Indexed: 01/08/2023]
Abstract
BACKGROUND Previous data suggest that reticulated platelets significantly affect antiplatelet response to thienopyridines. It is unknown whether parameters describing reticulated platelets can predict antiplatelet response to thienopyridines. OBJECTIVES The authors sought to determine the extent to which parameters describing reticulated platelets can predict antiplatelet response to thienopyridine loading compared with established predictors. METHODS This study randomized 300 patients undergoing elective coronary stenting to loading with clopidogrel 600 mg, prasugrel 30 mg, or prasugrel 60 mg. Adenosine diphosphate (ADP)-induced platelet reactivity was assessed by impedance aggregometry before loading (intrinsic platelet reactivity) and again on day 1 after loading. Multiple parameters of reticulated platelets were assessed by automated whole blood flow cytometry: absolute immature platelet count (IPC), immature platelet fraction, and highly fluorescent immature platelet fraction. RESULTS Each parameter of reticulated platelets correlated significantly with ADP-induced platelet reactivity (p < 0.01 for all 3 parameters). In a multivariable model including all 3 parameters, only IPC remained a significant predictor of platelet reactivity (p < 0.001). In models adjusting each of the 3 parameters for known predictors of on-treatment platelet reactivity including cytochrome P450 2C19 (CYP2C19) polymorphisms, age, body mass index, diabetes, and intrinsic platelet reactivity, only IPC prevailed as an independent predictor (p = 0.001). In this model, IPC was the strongest predictor of on-treatment platelet reactivity followed by intrinsic platelet reactivity. CONCLUSIONS IPC is the strongest independent platelet count-derived predictor of antiplatelet response to thienopyridine treatment. Given its easy availability, together with its even stronger association with on-treatment platelet reactivity compared with known predictors, including the CYP2C19*2 polymorphism, IPC may become the preferred predictor of antiplatelet response to thienopyridine treatment. (Impact of Extent of Clopidogrel-Induced Platelet Inhibition During Elective Stent Implantation on Clinical Event Rate-Advanced Loading Strategies [ExcelsiorLOAD]; DRKS00006102).
Collapse
|
22
|
Parvizi J, Ceylan HH, Kucukdurmaz F, Merli G, Tuncay I, Beverland D. Venous Thromboembolism Following Hip and Knee Arthroplasty: The Role of Aspirin. J Bone Joint Surg Am 2017; 99:961-972. [PMID: 28590382 DOI: 10.2106/jbjs.16.01253] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Javad Parvizi
- 1The Rothman Institute at Thomas Jefferson University, Philadelphia, Pennsylvania 2Bezmialem Vakif University, Istanbul, Turkey 3Thomas Jefferson University, Philadelphia, Pennsylvania 4Musgrave Park Hospital, Belfast, United Kingdom
| | | | | | | | | | | |
Collapse
|
23
|
|
24
|
Winter MP, Grove EL, De Caterina R, Gorog DA, Ahrens I, Geisler T, Gurbel PA, Tantry U, Navarese EP, Siller-Matula JM. Advocating cardiovascular precision medicine with P2Y12 receptor inhibitors. EUROPEAN HEART JOURNAL. CARDIOVASCULAR PHARMACOTHERAPY 2017; 3:221-234. [DOI: 10.1093/ehjcvp/pvw044] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/30/2016] [Indexed: 12/13/2022]
|
25
|
Al Shamiri MQ, Abdel Gader AM, Bayoumy NM. Comparing light transmission aggregometry and PFA100 for monitoring antiplatelet therapy in patients with coronary heart disease. J Taibah Univ Med Sci 2016. [DOI: 10.1016/j.jtumed.2016.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
26
|
Clinical Significance of Laboratory-determined Aspirin Poor Responsiveness After Primary Percutaneous Coronary Intervention. Cardiovasc Drugs Ther 2016; 30:151-8. [PMID: 26843365 DOI: 10.1007/s10557-016-6643-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
AIMS The objective of the present substudy was to examine whether aspirin poor/high responsiveness (APR/AHR) is associated with increased rates of major adverse cardiovascular events (MACE) and serious bleeding after primary percutaneous coronary intervention (PPCI). METHODS We analyzed 961 consecutive ST-elevation acute myocardial infarction patients who underwent PPCI between February 2008 and June 2011. Multiplate analyser (Dynabite, Munich, Germany) was used for the assessment of platelet reactivity. APR/AHR were defined as the upper/lower quintiles of ASPI values, determined 24 h after aspirin loading. APR patients were tailored using 300 mg maintenance dose for 30 days. The co-primary end points at 30 days were: MACE (death, non-fatal infarction, ischemia-driven target vessel revascularization and ischemic stroke) and serious bleeding according to the BARC classification. RESULTS One hundred and 90 patients were classified as APR, and 193 patients as AHR. At admission, compared with aspirin sensitive patients (ASP), patients with APR had more frequently diabetes, anterior infarction and heart failure, while AHR patients had reduced values of creatine kinase, leukocytes, heart rate and systolic blood pressure. Compared with ASP, the rates of 30-day primary end points did not differ neither in APR group including tailored patients (MACE, adjusted OR 1.02, 95%CI 0.47-2.17; serious bleeding, adjusted OR 1.92, 95%CI 0.79-4.63), nor in patients with AHR (MACE, adjusted OR 1.58, 95%CI 0.71-5.51; serious bleeding, adjusted OR 0.69, 95%CI 0.22-2.12). CONCLUSIONS The majority of APR patients were suitable for tailoring. Neither APR including tailored patients nor AHR were associated with adverse 30-day efficacy or safety clinical outcomes.
Collapse
|
27
|
Marcucci R, Grifoni E, Giusti B. On-treatment platelet reactivity: State of the art and perspectives. Vascul Pharmacol 2015; 77:8-18. [PMID: 26520003 DOI: 10.1016/j.vph.2015.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 09/20/2015] [Accepted: 10/12/2015] [Indexed: 01/01/2023]
Abstract
High on-clopidogrel platelet reactivity (HcPR) during dual-antiplatelet therapy is a marker of vascular risk, in particular stent thrombosis, in patients with acute coronary syndromes (ACS). Genetic determinants (CYP2C19*2 polymorphism), advanced age, female gender, diabetes and reduced ventricular function are related to a higher risk to develop HcPR. In addition, inflammation and increased platelet turnover, as revealed by the elevated percentage of reticulated platelets in patients' blood, that characterize the acute phase of acute coronary syndromes, are associated with HcPR. To overcome the limitation of clopidogrel, new antiplatelet agents (prasugrel and ticagrelor) were developed and the demonstration of their superiority over clopidogrel was obtained in the two randomized trials, TRITON TIMI 38 and PLATO. Emerging evidence is accumulating on the role of high-on aspirin platelet reactivity (HaPR), especially in the clinical context of diabetes. Finally, the presence of new, potent antiplatelet drugs has shifted the focus from thrombotic to bleeding risk. Recent data document that low on-treatment platelet reactivity (LPR) is associated with a significantly higher bleeding risk. Due to the current possibility to choose between multiple antiplatelet strategies, the future perspective is to include in the management of ACS, in addition to clinical data and classical risk factors, the definition of platelet function during treatment in order to set a tailored therapy.
Collapse
Affiliation(s)
- Rossella Marcucci
- Department of Experimental and Clinical Medicine, University of Florence, Italy; Center for Aterothrombotic Diseases, AOU Careggi, Florence, Italy.
| | - Elisa Grifoni
- Department of Experimental and Clinical Medicine, University of Florence, Italy; Center for Aterothrombotic Diseases, AOU Careggi, Florence, Italy
| | - Betti Giusti
- Department of Experimental and Clinical Medicine, University of Florence, Italy; Center for Aterothrombotic Diseases, AOU Careggi, Florence, Italy
| |
Collapse
|
28
|
Joshi KC, Thomas A, Jagannatha AT, Garg D. Stent-Assisted Coiling of Aneurysm in a Persistent Primitive Lateral Vertebrobasilar System. World Neurosurg 2015; 86:513.e9-14. [PMID: 26409091 DOI: 10.1016/j.wneu.2015.09.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 11/18/2022]
Abstract
Fenestrations of cerebral arteries are relatively common. Knowledge of their structure has recently gained clinical significance with increasing awareness of fenestration aneurysms. Persistent primitive lateral vertebrobasilar (PPLVB) anastomoses are an extreme end of the embryologic mishaps causing these fenestrations, and their occurrence has only been reported twice. We report the first case of an aneurysm within the PPLVB in a patient with unilateral subclavian stenosis. The unique anatomy of these aneurysms and relation with important perforators and brainstem make surgery extremely difficult and require advanced endovascular techniques like balloon remodeling and stent assistance. Three-dimensional rotational angiography can help in providing clarity to the aneurysmal anatomy and planning treatment. The purpose of this case report is to bring to notice the possibility of such aneurysms and use the unique anatomy to understand various tools available in the endovascular surgeon's armamentarium.
Collapse
Affiliation(s)
- Krishna Chaitanya Joshi
- Institute of Neurosciences, M S Ramaiah Medical College, MSR Nagar, MSRIT Post, Bangalore, Karnataka, India.
| | | | - Aniruddha T Jagannatha
- Institute of Neurosciences, M S Ramaiah Medical College, MSR Nagar, MSRIT Post, Bangalore, Karnataka, India
| | - Deepali Garg
- Department of Neuroanesthesia, NIMHANS, Bangalore, India
| |
Collapse
|
29
|
Arya V, Mahajan P, Saraf A, Mohanty A, Sawhney JPS, Bhargava M. Association of CYP2C19, CYP3A5 and GPIIb/IIIa gene polymorphisms with Aspirin and Clopidogrel Resistance in a cohort of Indian patients with Coronary Artery Disease. Int J Lab Hematol 2015; 37:809-18. [PMID: 26264906 DOI: 10.1111/ijlh.12416] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 07/13/2015] [Indexed: 12/27/2022]
Abstract
INTRODUCTION Dual antiplatelet therapy with clopidogrel and aspirin is the current standard of care in the management of patients with coronary artery disease (CAD) and acute coronary syndrome (ACS). The variability in response to these antiplatelet agents may be due to the underlying genetic diversity. This study was designed to determine the resistance to aspirin and clopidogrel in Indian patients and to look for correlation, if any, with selected polymorphisms. METHODS Platelet function testing by light transmission aggregometry was performed on 72 patients with CAD/ACS who were stable on dual antiplatelet therapy (clopidogrel 75 mg OD and aspirin 150 mg OD) along with 72 controls. Aspirin resistance was considered as mean platelet aggregation ≥ 70% with 10 μm ADP and ≥ 20% with 0.75 mm arachidonic acid. Clopidogrel resistance was defined as <10% decrease from the baseline in platelet aggregation in response to ADP 10 μm and semi-response as <30% decrease from the baseline. Polymorphisms CYP2C19*2, *3, CYP3A5*3 and PLA1/A2 were genotyped. RESULTS We found 51.4% patients with inadequate response to clopidogrel (1.4% resistant and 50% semi-responders) and 5.5% patients semi-responders to aspirin, none being completely resistant. The genotype and allele frequencies of CYP2C19*2 and PLA1/A2 gene polymorphisms were significantly different between clopidogrel semi-responders and responders. Carriers of CYP2C19*2 and CYP3A5*3 showed diminished inhibition of platelet aggregation. No significant correlation was found between coronary events, type of coronary intervention with clopidogrel nonresponsiveness. CONCLUSION Unlike aspirin, a high proportion of partial responders to clopidogrel were identified. In an interim analysis on 72 Indian patients, a significant association was found between CYP2C19*2 and PLA1/A2 in clopidogrel semi-responders.
Collapse
Affiliation(s)
- V Arya
- Department of Haematology, Sir Ganga Ram Hospital, New Delhi, India
| | - P Mahajan
- Department of Cardiology, Sir Ganga Ram Hospital, New Delhi, India
| | - A Saraf
- Department of Haematology, Sir Ganga Ram Hospital, New Delhi, India
| | - A Mohanty
- Department of Cardiology, Sir Ganga Ram Hospital, New Delhi, India
| | - J P S Sawhney
- Department of Cardiology, Sir Ganga Ram Hospital, New Delhi, India
| | - M Bhargava
- Department of Haematology, Sir Ganga Ram Hospital, New Delhi, India
| |
Collapse
|
30
|
Krüger JC, Meves SH, Kara K, Mügge A, Neubauer H. Monitoring ASA and P2Y12-specific platelet inhibition--comparison of conventional (single) and multiple electrode aggregometry. Scandinavian Journal of Clinical and Laboratory Investigation 2015; 74:568-74. [PMID: 25296945 DOI: 10.3109/00365513.2014.913305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Several platelet function test systems exist for the evaluation of the platelet inhibitory effect in patients on P2Y12 inhibitors and/or acetylsalicylic acid (ASA, aspirin) therapy. Studies comparing different available assays found only a poor correlation. The objective of the present study was to evaluate the correlation and agreement between single electrode (SEA) and multiple electrode (MEA) aggregometry. METHODS AND RESULTS In whole blood arachidonic acid (AA) and adenosine diphosphate (ADP)-induced platelet aggregation was measured simultaneously using SEA (Chrono-Log) and MEA (Multiplate). We analyzed a total of 226 measurements taken from 58 patients on single ASA therapy or dual antiplatelet therapy with ASA and a thienopyridine. A cut-off value for clopidogrel/prasugrel high on-treatment platelet reactivity (HPR) of > 47 units (U) was chosen for MEA testing using hirudin and > 5 Ohm for SEA with citrate anticoagulated blood samples. The respective cut-off values for ASA HPR were > 30 U for the MEA assay and > 1 Ohm for SEA testing. There was a good correlation of the prevalence of thienopyridine-HPR in both whole blood assays (Spearman rank correlation coefficient r = 0.698) and a good inter-rate accordance (Cohen's Kappa statistic κ = 0.648). For AA-induced aggregation, the correlation of the results obtained was significant (r = 0.536; p < 0.001) and detecting ASA-HPR revealed a moderate (κ = 0.482) correlation between both impedance aggregometry assays. CONCLUSION Platelet function testing using SEA and MEA provided both good accordance and correlation and therefore study results obtained by these two assays similarly enabled the detection of HPR of thienopyridine (and ASA) therapy.
Collapse
|
31
|
Matsumoto Y, Iko M, Tsutsumi M, Mitsutake T, Eto A, Nii K, Nakai K, Oishi H, Aikawa H, Kazekawa K. The Safety and Efficacy of Triple Antiplatelet Therapy after Intracranial Stent-Assisted Coil Embolization. J Stroke Cerebrovasc Dis 2015; 24:1513-9. [DOI: 10.1016/j.jstrokecerebrovasdis.2015.03.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/23/2015] [Accepted: 03/12/2015] [Indexed: 10/23/2022] Open
|
32
|
Ratcovich H, Holmvang L, Johansson PI, Parup Dridi N. Traditional clinical risk factors predict clopidogrel hypo-responsiveness in unselected patients undergoing non-emergent percutaneous coronary intervention. Platelets 2015; 27:51-8. [DOI: 10.3109/09537104.2015.1029899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
33
|
Łabuz-Roszak B, Pierzchała K, Niewiadomska E, Skrzypek M, Machowska-Majchrzak A. Searching for factors associated with resistance to acetylsalicylic acid used for secondary prevention of stroke. Arch Med Sci 2015; 11:106-14. [PMID: 25861296 PMCID: PMC4379375 DOI: 10.5114/aoms.2015.49211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 01/21/2013] [Accepted: 03/01/2013] [Indexed: 12/03/2022] Open
Abstract
INTRODUCTION The aim of the study was to evaluate the prevalence of resistance to acetylsalicylic acid (ASA), used for secondary prevention of stroke, including the assessment of risk factors associated with the lack of ASA anti-aggregatory action. MATERIAL AND METHODS Patients after a transient ischaemic attack (TIA) or ischaemic stroke in the acute (n = 111) and chronic phase (n = 87) were enrolled in the study. The assessment of platelet function was performed by whole blood impedance aggregometry using a multi-channel platelet function analyser (Multiplate). RESULTS A proper response to ASA was found in 121 patients (61.1%) (ASA responders), a partial response to ASA in 59 patients (29.8%) (ASA partial responders), and ASA resistance in 18 patients (9.1%) (ASA non-responders). Acetylsalicylic acid resistance was observed more frequently in the chronic phase. The mean low-density lipoprotein (LDL) concentration was higher in ASA non-responders (p = 0.02). The mean heart rate (p = 0.03) and the mean haematocrit (p = 0.03) were higher in the group of ASA partial responders and ASA non-responders. Angiotensin II receptor antagonists were more often used in the group of ASA partial responders and ASA non-responders (p = 0.04). Diuretics were more rarely used by ASA non-responders, whereas fibrates were more rarely used by ASA partial responders. CONCLUSIONS The method enabled the detection of ASA resistance in some patients with cerebrovascular disease. The study revealed some possible risk factors of ASA resistance: long ASA therapy, increased heart rate, higher LDL concentration, and higher haematocrit value. The relationship between the effect of ASA and other medications (angiotensin II receptor blockers, fibrates, diuretics) requires further study. Platelet function monitoring should be considered in patients at a greater risk of ASA resistance.
Collapse
Affiliation(s)
- Beata Łabuz-Roszak
- Chair and Clinical Department of Neurology in Zabrze, Medical University of Silesia, Katowice, Poland
| | - Krystyna Pierzchała
- Chair and Clinical Department of Neurology in Zabrze, Medical University of Silesia, Katowice, Poland
| | - Ewa Niewiadomska
- Department of Biostatistics, Faculty of Public Health, Medical University of Silesia, Katowice, Poland
| | - Michał Skrzypek
- Department of Biostatistics, Faculty of Public Health, Medical University of Silesia, Katowice, Poland
| | | |
Collapse
|
34
|
Personalized antiplatelet therapy with P2Y12 receptor inhibitors: benefits and pitfalls. ADVANCES IN INTERVENTIONAL CARDIOLOGY 2015; 11:259-80. [PMID: 26677375 PMCID: PMC4679793 DOI: 10.5114/pwki.2015.55596] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 11/05/2015] [Accepted: 11/05/2015] [Indexed: 02/07/2023] Open
Abstract
Antiplatelet therapy with P2Y12 receptor inhibitors has become the cornerstone of medical treatment in patients with acute coronary syndrome, after percutaneous coronary intervention and in secondary prevention of atherothrombotic events. Clopidogrel used to be the most broadly prescribed P2Y12 receptor inhibitor with undisputable benefits especially in combination with aspirin, but a considerable number of clopidogrel-treated patients experience adverse thrombotic events in whom insufficient P2Y12-inhibition and a consequential high on-treatment platelet reactivity is a common finding. This clinically relevant limitation of clopidogrel has driven the increased use of new antiplatelet agents. Prasugrel (a third generation thienopyridine) and ticagrelor (a cyclopentyl-triazolo-pyrimidine) feature more potent and predictable P2Y12-inhibition compared to clopidogrel, which translates into improved ischemic outcomes. However, excessive platelet inhibition and consequential low on-treatment platelet reactivity comes at the price of increased risk of major bleeding. The majority of randomized clinical trials failed to demonstrate improved clinical outcomes with platelet function testing and tailored antiplatelet therapy, but results of all recent trials of potent antiplatelets and prolonged antiplatelet durations point towards a need for individualized antiplatelet approach in order to decrease thrombotic events without increasing bleeding. This review focuses on potential strategies for personalizing antiplatelet treatment.
Collapse
|
35
|
Petricevic M, Kopjar T, Gasparovic H, Milicic D, Svetina L, Zdilar B, Boban M, Mihaljevic MZ, Biocina B. Impact of aspirin resistance on outcomes among patients following coronary artery bypass grafting: exploratory analysis from randomized controlled trial (NCT01159639). J Thromb Thrombolysis 2014; 39:522-31. [DOI: 10.1007/s11239-014-1127-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
36
|
Siller-Matula JM, Lang IM, Neunteufl T, Kozinski M, Maurer G, Linkowska K, Grzybowski T, Kubica J, Jilma B. Interplay between genetic and clinical variables affecting platelet reactivity and cardiac adverse events in patients undergoing percutaneous coronary intervention. PLoS One 2014; 9:e102701. [PMID: 25051347 PMCID: PMC4106864 DOI: 10.1371/journal.pone.0102701] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 06/23/2014] [Indexed: 12/30/2022] Open
Abstract
Several clinical and genetic variables are associated with influencing high on treatment platelet reactivity (HTPR). The aim of the study was to propose a path model explaining a concurrent impact among variables influencing HTPR and ischemic events. In this prospective cohort study polymorphisms of CYP2C19*2, CYP2C19*17, ABCB1, PON1 alleles and platelet function assessed by Multiple Electrode Aggregometry were assessed in 416 patients undergoing percutaneous coronary intervention treated with clopidogrel and aspirin. The rates of major adverse cardiac events (MACE) were recorded during a 12-month follow up. The path model was calculated by a structural equation modelling. Paths from two clinical characteristics (diabetes mellitus and acute coronary syndrome (ACS)) and two genetic variants (CYP2C19*2 and CYP2C19*17) independently predicted HTPR (path coefficients: 0.11 0.10, 0.17, and -0.10, respectively; p<0.05 for all). By use of those four variables a novel score for prediction of HTPR was built: in a factor-weighted model the risk for HTPR was calculated with an OR of 3.8 (95%CI: 3.1–6.8, p<0.001) for a score level of ≥1 compared with a score of <1. While MACE was independently predicted by HTPR and age in the multivariate model (path coefficient: 0.14 and 0.13, respectively; p<0.05), the coexistence of HTPR and age ≥75 years emerged as the strongest predictor of MACE. Our study suggests a pathway, which might explain indirect and direct impact of variables on clinical outcome: ACS, diabetes mellitus, CYP2C19*2 and CYP2C19*17 genetic variants independently predicted HTPR. In turn, age ≥75 years and HTPR were the strongest predictors of MACE.
Collapse
Affiliation(s)
| | - Irene M. Lang
- Department of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Thomas Neunteufl
- Department of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Marek Kozinski
- Department of Cardiology and Internal Medicine, Collegium Medicum of the Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Gerald Maurer
- Department of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Katarzyna Linkowska
- Institute of Molecular and Forensic Genetics, Collegium Medicum of the Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Tomasz Grzybowski
- Institute of Molecular and Forensic Genetics, Collegium Medicum of the Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Jacek Kubica
- Department of Cardiology and Internal Medicine, Collegium Medicum of the Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Bernd Jilma
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
- * E-mail: (JS-M); (BJ)
| |
Collapse
|
37
|
Wisman PP, Roest M, Asselbergs FW, de Groot PG, Moll FL, van der Graaf Y, de Borst GJ. Platelet-reactivity tests identify patients at risk of secondary cardiovascular events: a systematic review and meta-analysis. J Thromb Haemost 2014; 12:736-47. [PMID: 24612413 DOI: 10.1111/jth.12538] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 02/08/2014] [Indexed: 11/27/2022]
Abstract
BACKGROUND Antiplatelet therapy is the standard treatment for the prevention of cardiovascular events (CVEs). High on-treatment platelet reactivity (HPR) is a risk factor for secondary CVEs in patients prescribed aspirin and/or clopidogrel. The present review and meta-analysis was aimed at assessing the ability of individual platelet-function tests to reliably identify patients at risk of developing secondary CVEs. METHODS AND RESULTS A systematic literature search was conducted to identify studies on platelet-reactivity measurements and CVEs. The main inclusion criteria were: (i) prospective study design; (ii) study medication, including aspirin and/or clopidogrel; and (iii) a platelet-function test being performed at baseline, before follow-up started. Of 3882 identified studies, 102 (2.6%; reporting on 44 098 patients) were included in the meta-analysis. With regard to high on-aspirin platelet reactivity (HAPR), 22 different tests were discussed in 55 studies (22 441 patients). Pooled analysis showed that HAPR was diagnosed in 22.2% of patients, and was associated with an increased CVE risk (relative risk [RR] 2.09; 95% confidence interval [CI] 1.77-2.47). Eleven HAPR tests independently showed a significantly increased CVE risk in patients with HAPR as compared with those with normal on-aspirin platelet reactivity. As regards high on-clopidogrel platelet reactivity (HCPR), 59 studies (34 776 patients) discussed 15 different tests, and reported that HCPR was present in 40.4% of patients and was associated with an increased CVE risk (RR 2.80; 95% CI 2.40-3.27). Ten tests showed a significantly increased CVE risk. CONCLUSIONS Patients with HPR are suboptimally protected against future cardiovascular complications. Furthermore, not all of the numerous platelet tests proved to be able to identify patients at increased cardiovascular risk.
Collapse
Affiliation(s)
- P P Wisman
- Department of Vascular Surgery, UMC Utrecht, Utrecht, the Netherlands
| | | | | | | | | | | | | |
Collapse
|
38
|
Sevimli S, Karakoyun S, Bakirci EM, Topcu S, Kalkan K, Borekci A, Vançelik S. Impact of -455G/A Polymorphism of the β-Fibrinogen Gene on Platelet Aggregation in Patients With Acute Coronary Syndrome. Clin Appl Thromb Hemost 2014; 20:238-43. [DOI: 10.1177/1076029613508601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We aimed to investigate the association of aspirin and/or clopidogrel low response with −455G/A polymorphism of β-fibrinogen in patients with acute coronary syndrome (ACS). We enrolled 114 consecutive patients (mean age 61 ± 7, 31 female [27.2%], 83 male [72.8%]) with a first ACS. The diagnostic criteria for ACS were based on current guidelines. The -455 G/A β-fibrinogen polymorphism genotype distribution in the patient group was determined as the following: 54.4% GG homozygote, 39.5% GA, and 6.1% AA homozygote. Clopidogrel low response was present in 25 (21.9%) patients, aspirin low response in 21 (18.4%) patients, and dual antiplatelet low response in 9 (7.9%) patients. In our study, no difference was observed in terms of the distribution of -455 G/A β-fibrinogen polymorphism between the groups with and without aspirin and/or clopidogrel or dual antiplatelet low response in the patient group who underwent aspirin and clopidogrel treatment for ACS ( P > .05).
Collapse
Affiliation(s)
- Serdar Sevimli
- Department of Cardiology, Faculty of Medicine, Ataturk University, Erzurum, Turkey
| | | | - Eftal Murat Bakirci
- Department of Cardiology, Faculty of Medicine, Erzincan University, Erzincan, Turkey
| | - Selim Topcu
- Department of Cardiology, Faculty of Medicine, Ataturk University, Erzurum, Turkey
| | - Kamuran Kalkan
- Department of Cardiology, Faculty of Medicine, Ataturk University, Erzurum, Turkey
| | - Abdurrezzak Borekci
- Department of Cardiology, Faculty of Medicine, Kafkas University, Kars, Turkey
| | - Serhat Vançelik
- Department of Public Health, Faculty of Medicine, Ataturk University, Erzurum, Turkey
| |
Collapse
|
39
|
Gasparovic H, Petricevic M, Biocina B. Management of antiplatelet therapy resistance in cardiac surgery. J Thorac Cardiovasc Surg 2014; 147:855-62. [DOI: 10.1016/j.jtcvs.2013.10.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 09/24/2013] [Accepted: 10/06/2013] [Indexed: 12/01/2022]
|
40
|
DiNicolantonio JJ, Norgard NB, Meier P, Lavie CJ, O’Keefe J, Niazi AK, Chatterjee S, Packard KA, D’Ascenzo F, Cerrato E, Biondi-Zoccai G, Bangalore S, Fuchs FD, Serebruany VL. Optimal aspirin dose in acute coronary syndromes: an emerging consensus. Future Cardiol 2014; 10:291-300. [PMID: 24762255 DOI: 10.2217/fca.14.7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
ABSTRACT: Numerous clinical trials testing the efficacy of aspirin for the secondary prevention of cardiovascular disease have been published. We reviewed the literature pertaining to aspirin dose in acute coronary syndrome patients. Clinical trials assessing the comparative efficacy of different doses of aspirin are scarce. This complex antiplatelet therapy landscape makes it difficult to identify the best aspirin dose for optimizing efficacy and minimizing risk of adverse events, while complying with the various guidelines and recommendations. Despite this fact, current evidence suggests that aspirin doses of 75–100 mg/day may offer the optimal benefit:risk ratio in acute coronary syndrome patients.
Collapse
Affiliation(s)
| | - Nicholas B Norgard
- University of Buffalo, School of Pharmacy & Pharmaceutical Sciences, Buffalo, NY, USA
| | - Pascal Meier
- The Heart Hospital, University College London Hospitals, London, UK
- Yale Medical School, New Haven, CT, USA
| | - Carl J Lavie
- John Ochsner Heart & Vascular Institute, Ochsner Clinical School, The University of Queensland School of Medicine, New Orleans, LA, USA
- The Department of Preventive Medicine, Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - James H O’Keefe
- Saint Luke’s Mid America Heart Institute, Kansas City, MO, USA
- University of Missouri, Kansas City, Kansas City, MO, USA
| | | | - Saurav Chatterjee
- St Luke’s Roosevelt Hospital Center, Division of Cardiology, New York, NY, USA
| | - Kathleen A Packard
- Creighton University, School of Pharmacy & Health Professions, Omaha, NE, USA
| | - Fabrizio D’Ascenzo
- University of Turin, Division of Cardiology, Citta Della Salute e Della Scienza, Torino, Italy
| | - Enrico Cerrato
- University of Turin, Division of Cardiology, Citta Della Salute e Della Scienza, Torino, Italy
| | - Giuseppe Biondi-Zoccai
- Sapienza University of Rome, Department of Medico-Surgical Sciences & Biotechnologies, Latina, Italy
| | | | - Flavio D Fuchs
- Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Division of Cardiology & Postgraduate Studies Program in Cardiology, Rio Grande do Sul, Brazil
| | | |
Collapse
|
41
|
Abstract
Stroke represents a clinical syndrome rather than a single disease. A number of stroke subtypes can be distinguished based on careful phenotyping, with each of these having distinct and overlapping risk factor profiles. Recent evidence has suggested that genetics plays an important part in stroke risk, with at least 2 genes specific to stroke risk directly now having been identified. This review will explore our current understanding of the genetics underlying stroke risk and whether this information is currently useful in a clinical setting for patient benefit.
Collapse
Affiliation(s)
- Steve Bevan
- Stroke and Dementia Research Centre, St George's, University of London, Cranmer Terrace, Tooting, London, SW17 0RE, UK.
| | | |
Collapse
|
42
|
P V K, Kumar C U, J C S, P U, E C. Effect of Oral Anti-platelet Regimens on Platelet Aggregation using Chronolog Light Transmittance Aggregometry in Coronary Heart Disease Patients: An Observational Study. J Clin Diagn Res 2014; 7:2478-82. [PMID: 24392377 DOI: 10.7860/jcdr/2013/6884.3584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 08/12/2013] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Coronary heart disease is one of the most common cardiac health problem in India. Anti-platelet therapy is the cornerstone in the management of coronary heart disease. The current study was undertaken to compare the effect of different oral anti-platelet regimens on percentage inhibition of platelet aggregation in coronary heart disease patients using chronolog light transmittance aggregometry. MATERIAL AND METHODS Blood samples of 215 consecutive patients diagnosed of coronary heart disease (Male: Female ratio- 142: 73) with mean age of 55.2 ±10.3 years, who underwent platelet aggregation test were analysed. Patients were either on aspirin, clopidogrel, prasugrel, cilostazol or a combination of these drugs in different dosages. Of the 215 coronary heart disease patients, 35, 115 and 65 patients were on single, dual and triple anti-platelet drug regimen respectively. RESULTS The Percentage Inhibition of Platelet Aggregation (%IPA) in patients on dual anti-platelet regimen was highest i.e., 65.14 ± 23.23 as compared to 48.89 ± 22.16 in patients on monotherapy and 62.14 ± 21.64 in patients on triple anti-platelet regimen. Percentage of responders (> 40% inhibition of platelet aggregation) were 54.28%, 73.91% and 64.61% in single, dual and triple drug regimens respectively. Among responders on dual anti-platelet regimen, 64.7% were on aspirin + prasugrel and 35.3% were on aspirin + clopidogrel. The Percentage Inhibition of platelet aggregation in diabetics on dual anti-platelet regimen was 71.69 ± 17.54 as compared to 56.14 ± 23.29 in diabetics on triple anti-platelet regimen. CONCLUSION Dual anti-platelet therapy containing prasugrel was found to be more effective than dual anti-platelet therapy containing clopidogrel on background aspirin therapy and triple anti-platelet therapy in terms of percentage inhibition of platelet aggregation in coronary heart disease patients especially those with concomitant diabetes, however this conclusion needs to be further confirmed by large-scale randomized clinical trials.
Collapse
Affiliation(s)
- Kishan P V
- DM Residents, Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences , Panjagutta, Hyderabad, India
| | - Uday Kumar C
- DM Residents, Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences , Panjagutta, Hyderabad, India
| | - Shobha J C
- Professor & HOD, Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences , Panjagutta, Hyderabad, India
| | - Usharani P
- Additional Professor, Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences , Panjagutta, Hyderabad, India
| | - Chandrasekhar E
- Lab Analyst, Clinical Pharmacology & Medical Research Laboratory, Nizam's Institute of Medical Sciences , Panjagutta, Hyderabad, India
| |
Collapse
|
43
|
Dridi NP, Johansson PI, Clemmensen P, Stissing T, Radu MD, Qayyum A, Pedersen F, Helqvist S, Saunamäki K, Kelbæk H, Jørgensen E, Engstrøm T, Holmvang L. Prasugrel or double-dose clopidogrel to overcome clopidogrel low-response – The TAILOR (Thrombocytes And IndividuaLization of ORal antiplatelet therapy in percutaneous coronary intervention) randomized trial. Platelets 2013; 25:506-12. [DOI: 10.3109/09537104.2013.845874] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
44
|
Siller-Matula JM, Trenk D, Schrör K, Gawaz M, Kristensen SD, Storey RF, Huber K. Response Variability to P2Y12 Receptor Inhibitors. JACC Cardiovasc Interv 2013; 6:1111-28. [DOI: 10.1016/j.jcin.2013.06.011] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 06/20/2013] [Indexed: 12/19/2022]
|
45
|
Enomoto Y, Yoshimura S. Antiplatelet therapy for carotid artery stenting. INTERVENTIONAL NEUROLOGY 2013; 1:151-63. [PMID: 25187775 PMCID: PMC4031772 DOI: 10.1159/000351686] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Carotid artery stenting (CAS) is less invasive and has a lower incidence of systemic complications such as myocardial infarction compared with carotid endarterectomy. However, CAS is known to have a high incidence of ischemic complications due to distal thromboembolism. Progress has been made in the development of various distal protection devices and protection methods aimed at preventing thromboembolism. Similar to these methods, perioperative antiplatelet therapy is also able to play a very important role in the prevention of ischemic events. Dual antiplatelet therapy has become standard for perioperative management of CAS.
Collapse
Affiliation(s)
- Yukiko Enomoto
- Department of Neurosurgery, Graduate School of Medicine, Gifu University, Gifu City, Japan
| | - Shinichi Yoshimura
- Department of Neurosurgery, Graduate School of Medicine, Gifu University, Gifu City, Japan
| |
Collapse
|
46
|
Siller-Matula JM, Delle-Karth G, Christ G, Neunteufl T, Maurer G, Huber K, Tolios A, Drucker C, Jilma B. Dual non-responsiveness to antiplatelet treatment is a stronger predictor of cardiac adverse events than isolated non-responsiveness to clopidogrel or aspirin. Int J Cardiol 2013; 167:430-5. [DOI: 10.1016/j.ijcard.2012.01.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 01/01/2012] [Accepted: 01/06/2012] [Indexed: 11/25/2022]
|
47
|
Meves SH, Hummel T, Endres HG, Mayböck N, Kaiser AFC, Schröder KD, Rüdiger K, Overbeck U, Mumme A, Mügge A, Neubauer H. Effectiveness of antiplatelet therapy in atherosclerotic disease: comparing the ASA low-response prevalence in CVD, CAD and PAD. J Thromb Thrombolysis 2013; 37:190-201. [DOI: 10.1007/s11239-013-0919-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
48
|
Refining the role of antiplatelet therapy in medically managed patients with acute coronary syndrome. Am J Cardiol 2013; 111:439-44. [PMID: 23168289 DOI: 10.1016/j.amjcard.2012.10.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 10/09/2012] [Accepted: 10/09/2012] [Indexed: 01/20/2023]
Abstract
Dual-antiplatelet therapy with aspirin plus a P2Y(12) receptor inhibitor is recommended for use as first-line therapy in patients with acute coronary syndromes (ACS) who undergo high-risk percutaneous coronary intervention. However, revascularization may not be a beneficial option for some subgroups of patients with ACS. This includes a broad spectrum of lower risk patients as well as high-risk patients with numerous previous revascularizations and those who are at high risk for complications, such as those with complex coronary anatomy and co-morbidities such as diabetes mellitus, chronic kidney disease, or advanced age and frailty. For such patients, there remains an unmet need for evaluation of alternatives to the currently recommended treatment options. Notably, there is a paucity of prospective data regarding management approaches to medically managed patients with ACS. Thus, this group of medically managed patients with ACS would benefit from inclusion in clinical trials investigating therapeutic options for patients not scheduled to undergo invasive procedures, such as those who are targeted for pharmacologic management only. In conclusion, in this review, the investigators revisit data from clinical studies of dual-antiplatelet therapy in ACS to highlight areas of unmet need in antiplatelet therapy in patients with ACS and to examine the use of newer agents in subgroups, such as medically managed patients with ACS, that would potentially benefit from more potent platelet inhibition after ACS.
Collapse
|
49
|
Haji Aghajani M, Kobarfard F, Safi O, Sheibani K, Sistanizad M. Resistance to Clopidogrel among Iranian Patients Undergoing Angioplasty Intervention. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2013; 12:169-74. [PMID: 24250685 PMCID: PMC3813374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To study the resistance to standard dosage of clopidogrel among Iranian patients following percutaneous coronary intervention measured by platelet aggregation test. Patients undergoing percutaneous coronary intervention in Imam Hussein Medical center, Tehran, Iran, who were under treatment with aspirin, but had no history of clopidogrel usage, entered the study. Patients received standard dosage of clopidogrel (Plavix(®), Sanofi, France, 600 mg loading dose and 75 mg/day afterward). Platelet aggregation was measured using light transmission aggregometer. The response to the drug was categorized as complete resistance (platelet aggregation decreased less than 10%), intermediate resistance (platelet aggregation decreased between 10 to 30%) and complete response (platelet aggregation decreased to 30% or more). All patients were evaluated for major adverse cardio vascular events one month after the angioplasty based on MACE criteria by phone contact. Thirty-one patients with a mean age of 59 ± 13 entered the study. Sixty-five percent of patients showed complete response to clopidogrel (95% CI: 45% to 81%), 22% showed intermediate resistance (95% CI: 10-41%) and 13% showed complete resistance (95% CI: 4-30%). One month after the angioplasty, no major adverse cardiovascular event was recorded. Based on our findings, it seems that there is no major difference between Iranian population and other studies regarding the resistance to clopidogrel. Due to the limited number of participants in our study, further investigations with higher number of patients are recommended to more precisely calculate the percentage of resistance among Iranian patients.
Collapse
Affiliation(s)
- Mohammad Haji Aghajani
- Department of Cardiology, Imam Hussein Medical and Educational Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Farzad Kobarfard
- Department of Medical Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Olia Safi
- Department of Clinical Pharmacy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Kourosh Sheibani
- Clinical Research and Development Center, Imam Hussein Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mohammad Sistanizad
- Department of Clinical Pharmacy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran. ,Department of Pharmaceutical Care, Imam Hussein Medical and Educational Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran. ,Corresponding author: E-mail:
| |
Collapse
|
50
|
|