Antiplatelet Strategies Research Articles

Abstract 4138601: Comparison Between Mono VS Dual VS Triple Antiplatelet Therapy In Patients With Ischemic Heart Disease Undergoing PCI, A Network Meta-Analysis.

Background: Antiplatelets are important in ischemic heart disease(IHD) patients. We aim to research the efficacy and safety of single(SAPT), dual(DAPT), and triple(TAPT) antiplatelet approaches in IHD patients undergoing PCI. Methods: A systematic review was conducted until April 1st, 2024, and a network meta-analysis using the Netmeta package in R studio 4.3.3 was performed. Primary outcomes were cardiac death, myocardial infarction(MI), stent thrombosis, stroke, and major bleeding(BARC 3-5). A sensitivity analysis was done to explain variables with high heterogeneity. Results: From 25 studies, a total of 65115 patients were included in the analysis. For cardiac death, 17 studies showed TAPT had a lower risk than DAPT compared to SAPT [RR = 0.74; 95%CI (0.40 to 1.35); p-value = 0.33], [RR = 1.01, 95%CI (0.84 to 1.19); p-value = 0.87] respectively. The heterogeneity was insignificant(I2=0%; p-value=0.58. For MI, 23 studies found TAPT had a lower risk than DAPT compared to SAPT [RR = 0.77; 95%CI (0.51 to 1.16); p-value = 0.2047], [RR = 0.81, 95%CI (0.64 to 1.03); p-value = 0.0850] respectively. The heterogeneity was significant (I2 = 53%). For stent thrombosis, 17 studies showed DAPT had a lower risk than TAPT compared to SAPT [RR = 0.74; 95%CI (0.45 to 1.21); p-value = 0.2284], [RR = 0.84, 95%CI (0.27 to 2.59); p-value = 0.7630] respectively. The heterogeneity in this comparison was significant. For stroke, 17 studies showed DAPT had a lower risk than TAPT for stroke in comparison to SAPT [RR = 0.91; 95%CI (0.75 to 1.10); p-value = 0.3209], and [RR = 0.87, 95%CI (0.43 to 1.76); p-value=0.6937], respectively. The heterogeneity was insignificant(I2=0%; p-value=0.8165). For Major bleeding(BARC 3-5), 15 studies showed DAPT had a lower risk than TAPT in comparison to SAPT[RR = 1.43; 95%CI (1.09 to 1.88); p-value = 0.0107], [RR = 2.78, 95%CI (0.90 to 4.78); p-value = 0.0852] respectively. The heterogeneity was significant(I2 = 49.5%). Conclusion: Personalized treatment approaches that consider the benefits and risks of different antiplatelet strategies are crucial for optimal patient management of IHD.

Temporal modulation (early escalation and late de-escalation) of antiplatelet therapy in patients undergoing complex high-risk PCI: rationale and design of the TAILORED-CHIP trial.

Despite the use of conventional dual antiplatelet therapy (DAPT) after percutaneous coronary intervention (PCI), the risk of adverse events remains high among patients with increased thrombotic risk. Until recently, the optimal antiplatelet strategy to balance the ischaemic and bleeding risks in patients who are undergoing complex high-risk PCI has been unclear. The TAILored Versus COnventional AntithRombotic StratEgy IntenDed for Complex HIgh-Risk PCI (TAILORED-CHIP) trial is an investigator-initiated, multicentre, prospective randomised trial to evaluate the efficacy and safety of a time-dependent tailored antiplatelet therapy with an early (<6 months post-PCI) escalation (low-dose ticagrelor at 60 mg twice daily plus aspirin) and a late (>6 months post-PCI) de-escalation (clopidogrel monotherapy) in patients undergoing complex high-risk PCI as compared with standard DAPT (clopidogrel plus aspirin for 12 months). Eligible patients had to have at least one high-risk anatomical or procedural feature or clinical characteristic associated with an increased risk of ischaemic or thrombotic events. The primary endpoint was the net clinical outcome, a composite of death from any cause, myocardial infarction, stroke, stent thrombosis, urgent revascularisation, or clinically relevant bleeding (Bleeding Academic Research Consortium type 2, 3, or 5) at 12 months after randomisation. (ClinicalTrials.gov: NCT03465644).

Functional Foods in Preventing Human Blood Platelet Hyperactivity-Mediated Diseases—An Updated Review

Backgrounds/Objectives: Abnormal platelet functions are associated with human morbidity and mortality. Platelets have emerged as critical regulators of numerous physiological and pathological processes beyond their established roles in hemostasis and thrombosis. Maintaining physiological platelet function is essential to hemostasis and preventing platelet-associated diseases such as cardiovascular disease, cancer metastasis, immune disorders, hypertension, diabetes, sickle cell disease, inflammatory bowel disease, sepsis, rheumatoid arthritis, myeloproliferative disease, and Alzheimer’s disease. Platelets become hyperactive in obesity, diabetes, a sedentary lifestyle, hypertension, pollution, and smokers. Platelets, upon activation, can trawl leukocytes and progenitor cells to the vascular sites. Platelets release various proinflammatory, anti-inflammatory, and angiogenic factors and shed microparticles in the circulation, thus promoting pathological reactions. These platelet-released factors also maintain sustained activation, further impacting these disease processes. Although the mechanisms are unknown, multiple stimuli induce platelet hyperreactivity but involve the early pathways of platelet activation. The exact mechanisms of how hyperactive platelets contribute to these diseases are still unclear, and antiplatelet strategies are inevitable for preventing these diseases. Reducing platelet function during the early stages could significantly impact these diseases. However, while this is potentially a worthwhile intervention, using antiplatelet drugs to limit platelet function in apparently healthy individuals without cardiovascular disease is not recommended due to the increased risk of internal bleeding, resistance, and other side effects. The challenge for therapeutic intervention in these diseases is identifying factors that preferentially block specific targets involved in platelets’ complex contribution to these diseases while leaving their hemostatic function at least partially intact. Since antiplatelet drugs such as aspirin are not recommended as primary preventives, it is essential to use alternative safe platelet inhibitors without side effects. Methods: A systematic search of the PUBMED database from 2000 to 2023 was conducted using the selected keywords: “functional foods”, “polyphenols”, “fatty acids”, “herbs”, fruits and vegetables”, “cardioprotective agents”, “plant”, “platelet aggregation”, “platelet activation”, “clinical and non-clinical trial”, “randomized”, and “controlled”. Results: Potent natural antiplatelet factors have been described, including omega-3 fatty acids, polyphenols, and other phytochemicals. Antiplatelet bioactive compounds in food that can prevent platelet hyperactivity and thus may prevent several platelet-mediated diseases, including cardiovascular disease. Conclusions: This narrative review describes the work during 2000–2023 in developing functional foods from natural sources with antiplatelet effects.

Comparative effects of different antiplatelet strategies in carriers of CYP2C19 loss-of-function alleles: a network meta-analysis

Abstract Background Carriers of cytochrome 2C19 (CYP2C19) loss of function (LoF) alleles treated with clopidogrel have impaired drug metabolism resulting in reduced active metabolite levels, high platelet reactivity (HPR), and an increased risk of thrombotic events. Several alternative antiplatelet therapies have been proposed to overcome HPR in these patients, but their comparative effects remain poorly explored. Purpose To assess the comparative effects of different alternative antiplatelet agents in carriers of CYP2C19 LoF alleles undergoing percutaneous coronary interventions (PCI). Methods Randomized controlled trials (RCTs) comparing different oral antiplatelet therapies in carriers of CYP2C19 LoF alleles undergoing PCI were included. A frequentist network meta-analysis was conducted to estimate mean difference (MD) or odds ratios (OR) and 95% confidence intervals (CI). The primary outcome was platelet reactivity assessed by VerifyNow and reported as P2Y12 reaction unit (PRU). The secondary outcome was the rate of HPR as defined in each trial. Standard-dose of clopidogrel (75 mg daily) was used as reference treatment. Antiplatelet strategies were ranked according to P-scores, ranging between 0 (poor performance) and 1 (good performance). Results A total of 13 RCTs testing 6 alternative strategies (i.e., clopidogrel 150 mg, prasugrel 3.75 mg, 5 mg, and 10 mg, ticagrelor 90 mg bid, and adjunctive cilostazol 100 mg bid) were included in the network. Compared with standard-dose clopidogrel, the greatest reduction in PRU was observed with prasugrel 10 mg (MD -128.61; 95% CI -145.09; -111.49) and ticagrelor 90 mg bid (MD -125.61; 95% CI -170.66; -80.56), followed by prasugrel 5 mg (MD -118.03; 95% CI -143.15; -92.92) and prasugrel 3.75 mg (MD -73.00; 95% CI -108.97; -37.03). High-dose clopidogrel was associated with a modest (MD -32.11; 95% CI -51.33; -12.90) and adjunctive cilostazol with a non-significant (MD -44.11; 95% CI -98.05; -9.82) reduction in PRU compared with standard-dose clopidogrel (Figure 1). Rates of HPR were reduced with all treatments compared with standard-dose clopidogrel. Ranking of treatments for the primary endpoint showed that standard-dose prasugrel ranked as the best treatment (P-score=0.884), followed by ticagrelor (P-score=0.835), low-dose prasugrel (0.767), very-low dose prasugrel (P-score=0.474), cilostazol (P-score=0.306), high-dose clopidogrel (P-score=0.224), and standard-dose clopidogrel (P-score=0.009) (Figure 2). Conclusion Among carriers of CYP2C19 LoF alleles undergoing PCI, standard-dose prasugrel or ticagrelor are most effective in reducing platelet reactivity, followed by reduced-dose of prasugrel, while double-dose clopidogrel and adjunctive cilostazol showed only modest effects. The clinical implications of these pharmacodynamically effective strategies warrant further investigation.

Complex versus non-complex, should we adjust the antiplatelet strategy to the type of percutaneous coronary intervention? Results from a real world PCI population

Abstract Background/introduction Personalized dual antiplatelet treatment (DAPT) using risk stratification is key to minimize bleeding- and ischemic events after percutaneous coronary intervention (PCI). Known ischemic risk factors include complex procedures which are integrated in the recommendation for extended DAPT in patients with additional ischemic risk factors. Purpose We aimed to provide insight whether a complex PCI (CPCI) should be regarded as an individual risk factor, regardless of other risk factors, to adjust the antiplatelet strategy. Also, we determined the effect of DAPT duration and choice of P2Y12 inhibitor on outcomes. Methods We included patients from the South East (Zuid Oost) Netherlands Heart Registry (ZON-HR) and excluded patients using oral anticoagulants. This PCI registry prospectively collects baseline-, procedural- and follow-up data including medication use and the intended DAPT duration. Patients were stratified to non-CPCI or CPCI comprising of bifurcation lesions with two stents, venagraft PCI, chronic total occlusion (CTO) or ≥ 60mm stent. Analyses were conducted using Cox regression analysis. Multivariate analysis was performed to adjust for risk factors and baseline differences. Results We included 3691 patients (842 CPCI). Table 1 demonstrates the baseline characteristics and DAPT strategy. CPCI was more often required in patients with a high ischemic risk profile based on the extensiveness of atherosclerosis and comorbidities. Non-CPCI patients more often underwent PCI for acute coronary syndrome. Outcomes are presented in table 2. Compared to non-CPCI, CPCI increased the risk of major adverse cardiac and cerebral events (MACCE) in the second half of the year as opposed to bleeding events, which more often occurred in the first months after CPCI, driven by access site bleedings (73% in CPCI versus 56% in non-CPCI, p=0.01). All-cause mortality was higher during the overall follow-up period after a CPCI compared to non-CPCI. These findings remain significant when corrected for additional risk factors in both groups. In patients with CPCI, treatment with ticagrelor or prasugrel strongly reduced MACCE between 6-12 months when compared to clopidogrel (multivariate HR: 0.28, 95% CI: 0.08-0.98), but did not influence bleeding events or all-cause mortality. No effect of extended DAPT was observed. Conclusions A CPCI is an important ischemic risk factor that could be used for risk stratification to guide antiplatelet strategy. Treatment with ticagrelor or prasugrel strongly diminished the risk of MACCE without increasing the bleeding risk in patients with a CPCI. As the risk of MACCE increases between 6-12 months after PCI while the risk of bleeding events diminishes in this period, extended DAPT from 6 to 12 months could also be considered to provide extended protection.Table 1.Table 2

Platelet-large cell ratio predicts no-reflow in patients undergoing primary coronary angioplasty for ST-segment elevation myocardial infarction

Abstract Background Increased platelet indices have been shown to reflect higher degree of platelet activation and have been related to poorer short- and long-term outcomes in patients presenting with ST-segment elevation myocardial infarction (STEMI). Purpose We aimed to evaluate the ability of a validated marker of platelet activation (i.e., the platelet-large cell ratio [P-LCR]) to predict the occurrence of no-reflow in patients undergoing primary percutaneous coronary intervention (pPCI) for STEMI. The ability of P-LCR to predict other markers of thrombotic charge (i.e., use of glycoprotein IIb/IIIa inhibitors and/or thrombus aspiration) was also investigated. Methods Use of glycoprotein IIb/IIIa inhibitors and/or thrombus aspiration, occurrence of the ‘no-reflow’ phenomenon and P-LCR values on admission were recorded in 836 consecutive patients treated by pPCI for STEMI. Patients’ demographic data and symptom onset-to-cardiac catheterization laboratory time intervals were also recorded. Correlations between P-LCR values and the presence of thrombotic charge markers were evaluated. Results No-reflow occurred in 124 (14.8%) of the study patients; glycoprotein IIb/IIIa inhibitors and thrombus aspiration were used in 228 (27.3%) and in 289 (34.5%) of patients, respectively. Mean P-LCR values were 27.1 ± 7.6%. P-LCR values on admission were significantly higher in patients who presented no-reflow than in those who did not (29.1 ± 5.6% vs. 25.3 ± 5.8%, p = 0.03). Similarly, P-LCR were significantly higher in patients in whom glycoprotein IIb/IIIa inhibitors (29.5 ± 6.1% vs. 25.2 ± 5.3%, p = 0.04) and/or thrombus aspiration (28.4 ± 5.7% vs. 24.8 ± 5.4%, p = 0.03) were used. A P-LCR value ≥26.9% predicted the occurrence of no-reflow with 70.9% sensitivity and 55.4% specificity (p = 0.04). Conclusions In the present cohort, P-LCR values on admission predicted the presence of thrombotic charge markers in patients undergoing pPCI for STEMI. Evaluating P-LCR on admission could help identify patients at increased risk of no-reflow, in whom more intensive antiplatelet strategies may be of interest.

Antiplatelet Strategy for Patients With Acute Coronary Syndrome Undergoing Percutaneous Coronary Intervention: ASystematic Review and Network Meta-Analysis.

Optimal duration and choice of antiplatelet therapy in patients with acute coronary syndrome undergoing percutaneous coronary intervention remain controversial. Digital databases (PubMed, Cochrane, and Embase) were queried to select all randomized controlled trials on a post-percutaneous coronary intervention population with acute coronary syndrome. Dual-antiplatelet therapy (DAPT) with aspirin and clopidogrel for 12 months was compared with 4 major strategies: high-potency, high- to low-potency, low-dose, and short-duration DAPT. A network meta-analysis was performed to compare the safety and efficacy of different antiplatelet strategies. This study was the second updated manuscript under the International Prospective Register of Systematic Reviewregistration (CRD42021286552). Thirty-two randomized controlled trials comprising 103 459 (51 750 experimental, 51 709 control) patients were included. Compared with DAPT with aspirin and clopidogrel for 12 months, high- to low-potency DAPT (risk ratio [RR], 0.69 [95% CI, 0.52-0.92]) and aspirin+prasugrel containing DAPT for 12 months (RR, 0.84 [95% CI, 0.72-0.98]) had a significantly lower, whereas DAPT for 1 month followed by clopidogrel only (RR, 1.59 [95% CI, 1.06-2.39]) had a higher, incidence of major adverse cardiovascular events at 1 year (median follow-up). Prasugrel (RR, 1.35 [95% CI, 1.09-1.66]) and ticagrelor (RR, 1.38 [95% CI, 1.17-1.62]) containing DAPT for 12 months had significantly higher rates, whereas high- to low-potency DAPT (RR, 0.85 [95% CI, 0.63-1.15]) had no significant risk of major bleeding. Aspirin and ticagrelor for 3 months, followed by aspirin and clopidogrel for the remaining duration, can be considered the optimal strategy for treating post-percutaneous coronary intervention patients with acute coronary syndrome because of a significantly reduced risk of major adverse cardiovascular events without increasing the risk of bleeding.

Unraveling the Complexities for Antiplatelet Strategies Among Patients With Acute Coronary Syndromes Undergoing Percutaneous Coronary Intervention.

Unraveling the Complexities for Antiplatelet Strategies Among Patients With Acute Coronary Syndromes Undergoing Percutaneous Coronary Intervention.

2023 European Society of Cardiology guidelines for the management of acute coronary syndromes : Statement of endorsement by the NVVC.

This review discusses the new recommendations in the 2023 European Society of Cardiology guidelines on the management of acute coronary syndrome and provides aperspective on topics specific to clinical practice in the Netherlands, including pre-treatment, antiplatelet agent strategies, the use of risk scores and logistical considerations with regard to the timing of coronary angiography.

Current trends in antiplatelet strategies for emergent carotid stenting in acute tandem occlusions: a web-based, nationwide survey in the Italian neurovascular community.

Although a benefit from mechanical thrombectomy has been proven, the best treatment strategy for tandem occlusions (TOs) remains unclear. We conducted a survey that aimed to investigate the trends of pharmacological strategy in the setting of emergent carotid stenting for TOs in the Italian neuro-endovascular community. We administered a 13-multiple choice-questions survey to the Chiefs of the centers participating to the Italian Registry of Endovascular Thrombectomy in Acute Stroke (IRETAS), focused on the technical aspects and on the management of the antiplatelet therapy for emergent carotid tenting in TOs. An internal coherence control was performed by the coordinating investigator. We obtained responses from 56/66 centers (84.8%). The main results of the survey showed that most of the center treat TOs using a retrograde approach, deploying a closed-cell stent. A single antiplatelet therapy is preferred at the moment of the deployment of the stent. This survey showed that the current practice regarding the acute management of TOs, in particular the antiplatelet therapy, remains heterogeneous in the Italian neurovascular community. Specific evidences are urgently needed in order to achieve a consensus on the acute management of TOs.

Antiplatelet Therapy for Elderly Patients with Acute Coronary Syndrome Undergoing Percutaneous Coronary Intervention.

The elderly represent an increasing proportion of patients presenting with acute coronary syndrome (ACS). Various data have shown that the benefits of percutaneous coronary revascularization are maintained in elderly patients presenting with ACS. Conversely, the management of antiplatelet therapy remains challenging and controversial, because older patients are usually at a high risk of both ischemia and bleeding. Moreover, the recommended ischemic and bleeding risk scores in patients with ACS were developed from studies with a low representation of older patients. New antiplatelet strategies have been developed, but their evidence in elderly patients is limited because they are usually underrepresented in randomized clinical trials due to their clinical complexity. The aim of this review is to summarize the different factors associated with increased ischemic and/or bleeding risk and the scientific evidence about the different antiplatelet strategies in elderly patients presenting with ACS and undergoing percutaneous coronary revascularization.

Different antithrombotic strategies after coronary artery bypass grafting to prevent adverse events: a retrospective analysis

ObjectiveCoronary artery bypass grafting (CABG) is associated with antithrombotic therapy in terms of postoperative adverse events; however, it is still unknown whether the early use of such drugs after CABG is safe and effective. In this study, we aim to evaluate the relationship between different postoperative antithrombotic strategies and in-hospital adverse events in patients undergoing isolated coronary artery bypass grafting surgery.MethodsThis was a single-center, retrospective cohort analysis of patients undergoing isolated CABG due to coronary artery disease (CAD) between 2001 and 2012. Data were extracted from the Medical Information Mart for Intensive Care III database. The patients involved were divided into the ASA (aspirin 81 mg per day only) or DAPT (aspirin plus clopidogrel 75 mg per day) group according to the antiplatelet strategy. Patients were also stratified into subgroups based on the type of anticoagulation. The in-hospital risk of bleeding and adverse events was investigated and compared between groups. Propensity score matching (PSM) was performed to reduce the potential effects of a selection bias.ResultsA total of 3274 patients were included in this study, with 2358 in the ASA group and 889 in the DAPT group. Following the PSM, no significant difference was seen in the risk of major bleeding between the two groups according to the PLATO, TIMI or GUSTO criteria. There was no difference in the postoperative mortality. In subgroup analysis, patients given anticoagulant therapy had an increased incidence of bleeding-related events. Multivariable analysis revealed that postoperative anticoagulant therapy and the early use of heparin, but not DAPT, were independent predictors of bleeding-related events.ConclusionsPostoperative DAPT was not associated with an increased occurrence of bleeding-related events in patients undergoing isolated CABG and appears to be a safe antiplatelet therapy. The addition of anticoagulants to antiplatelet therapy increased the risk of bleeding and should be considered cautiously in clinical practice.

Potential antiplatelet agents with grape seed – backbone polyphenols: computational studies

The study focused on grape seed-derived polyphenols for their antiplatelet, anti-inflammatory, and fibrinolytic properties through molecular docking and dynamics simulations. Compounds were evaluated for their effects on P2Y12, PTP1B, thromboxane A2, and other targets. Compounds 1 and 6 showed strong inhibitory potential on P2Y12. Compounds 2 and 7, plus epigallocatechin gallate, demonstrated effective inhibition on NF-KB and COX1. The compounds exhibited drug-like properties and potential for new thrombotic disease therapies. The research sheds light on the interactions between polyphenols and target proteins, paving the way for novel antiplatelet strategies.

Antiplatelet therapy after coronary artery bypass surgery: five year follow-up of randomised DACAB trial

ObjectiveTo assess the effect of different antiplatelet strategies on clinical outcomes after coronary artery bypass grafting.DesignFive year follow-up of randomised Different Antiplatelet Therapy Strategy After Coronary Artery Bypass Grafting (DACAB)...

Prognostic Impact of CYP2C19 Genotypes on Long-Term Clinical Outcomes in Older Patients After Percutaneous Coronary Intervention.

Carriers of CYP2C19 loss-of-function alleles have increased adverse events after percutaneous coronary intervention, but limited data are available for older patients. We aimed to evaluate the prognostic impact of CYP2C19 genotypes on clinical outcomes in older patients after percutaneous coronary intervention. The study included 1201 older patients (aged ≥75 years) who underwent percutaneous coronary intervention and received clopidogrel-based dual antiplatelet therapy in South Korea. Patients were grouped on the basis of CYP2C19 genotypes. The primary outcome was 3-year major adverse cardiac events, defined as a composite of cardiac death, myocardial infarction, and stent thrombosis. Older patients were grouped into 3 groups: normal metabolizer (36.6%), intermediate metabolizer (48.1%), and poor metabolizer (15.2%). The occurrence of the primary outcome was significantly different among the groups (3.1, 7.0, and 6.2% in the normal metabolizer, intermediate metabolizer, and poor metabolizer groups, respectively; P=0.02). The incidence rate of all-cause death at 3 years was greater in the intermediate metabolizer and poor metabolizer groups (8.1% and 9.2%, respectively) compared with that in the normal metabolizer group (3.5%, P=0.03) without significant differences in major bleeding. In the multivariable analysis, the intermediate metabolizer and poor metabolizer groups were independent predictors of 3-year clinical outcomes. In older patients, the presence of any CYP2C19 loss-of-function allele was found to be predictive of a higher incidence of major adverse cardiac events within 3 years following percutaneous coronary intervention. This finding suggests a need for further investigation into an optimal antiplatelet strategy for older patients. URL: https://clinicaltrials.gov. Identifier: NCT04734028.

Comparative effects of different antiplatelet strategies in carriers of CYP2C19 loss-of-function alleles: a network meta-analysis.

Carriers of cytochrome 2C19 (CYP2C19) loss-of-function (LoF) alleles treated with clopidogrel have impaired drug metabolism, resulting in reduced active metabolite levels, high platelet reactivity (HPR), and an increased risk of thrombotic events. Several alternative antiplatelet therapies have been proposed to overcome HPR in these patients, but their comparative effects remain poorly explored. Randomized controlled trials (RCTs) comparing different oral antiplatelet therapies in carriers of CYP2C19 LoF alleles undergoing percutaneous coronary interventions (PCI) were included. A frequentist network meta-analysis was conducted to estimate mean difference (MD) or odds ratios and 95% confidence intervals (CI). The primary outcome was platelet reactivity assessed by VerifyNow and reported as P2Y12 reaction unit (PRU). The secondary outcome was the rate of HPR. Standard dose of clopidogrel (75mg daily) was used as a reference treatment. A total of 12 RCTs testing 6 alternative strategies (i.e. clopidogrel 150mg, prasugrel 3.75mg, 5mg, and 10mg, ticagrelor 90mg bid, and adjunctive cilostazol 100mg bid) were included in the network. Compared with standard-dose clopidogrel, the greatest reduction in PRU was observed with prasugrel 10mg (MD -127.91; 95% CI -141.04; -114.78) and ticagrelor 90mg bid (MD -124.91; 95% CI -161.78; -88.04), followed by prasugrel 5mg (MD -76.33; 95% CI -98.01; -54.65) and prasugrel 3.75mg (MD -73.00; 95% CI -100.28; -45.72). Among other strategies, adjunctive cilostazol (MD -42.64; 95% CI -64.72; -20.57) and high-dose clopidogrel (MD -32.11; 95% CI -51.33; -12.90) were associated with a modest reduction in PRU compared with standard-dose clopidogrel. Among carriers of CYP2C19 LoF alleles undergoing PCI, standard-dose prasugrel or ticagrelor are most effective in reducing platelet reactivity, while double-dose clopidogrel and additional cilostazol showed modest effects. Reduced-dose of prasugrel may represent a balanced strategy to overcome HPR without a significant increase in bleeding. The clinical implications of these pharmacodynamic findings warrant further investigation.

Correction to: An Aspirin-Free Versus Dual Antiplatelet Strategy for Coronary Stenting: STOPDAPT-3 Randomized Trial.

Correction to: An Aspirin-Free Versus Dual Antiplatelet Strategy for Coronary Stenting: STOPDAPT-3 Randomized Trial.

The impact of various antiplatelet strategies on the incidence of gouty arthritis in hospitalized patients with acute cerebral infarction

Objectives1.To explore the incidence of concurrent gouty arthritis (GA) during hospitalization in patients with different subtypes of acute stroke.2.To investigate disparities in acute cerebral infarction patients with coexisting GA undergoing various antiplatelet strategies. Materials and methodsData from acute stroke patients admitted to the Affiliated Panyu Central Hospital of Guangzhou Medical University, from January 2019 to December 2021, underwent screening. The incidence of GA in acute stroke patients of various subtypes were analyzed. Subsequently, we divided cerebral infarction cases into three cohorts based on distinct antiplatelet therapies: the aspirin group, the dual antiplatelet therapy group (DAPT，aspirin plus clopidogrel), and the clopidogrel group. Investigate disparities in acute cerebral infarction patients with coexisting GA undergoing various antiplatelet strategies. ResultsA total of 12,381 patients with acute stroke were screened in this study. The incidence of GA in various subtypes of acute stroke was as follows: cerebral infarction (3.56 %, n = 9890), TIA (1.81 %, n = 443), cerebral hemorrhag (0.64 %, n = 1713), and SAH (0.30 %, n = 335). The incidence of GA in patients with ischemic stroke is higher than that of hemorrhagic stroke (χ2 = 49.258, p<0.001). No significant differences were observed in the incidence of GA among three different antiplatelet therapy groups. But there was marginal statistical difference in the incidence of GA between the aspirin group and the DAPT group (P = 0.051), as well as between the clopidogrel group and the DAPT group (P = 0.059). ConclusionsThe incidence of GA in patients with ischemic stroke is higher than that of hemorrhagic stroke. No significant differences were observed in the incidence of GA in acute cerebral infarction across various antiplatelet Strategies. The marginal statistical difference in the incidence of GA between the single antiplatelet group and the DAPT group requires further investigation.

STEMI antiplatelet pretreatment strategy - national multicenter registry experience

Abstract Funding Acknowledgements None. Background/Introduction Antiplatelet therapy is the cornerstone treatment for ST-segment elevation myocardial infarction (STEMI). Dual antiplatelet therapy (DAPT) including aspirin and a potent P2Y12 inhibitor (P2Y12i) is recommended as the default strategy. However, the timing of DAPT remains controversial: European Cardiology Society (ESC) guidelines ceased recommending pretreatment with P2Y12i in STEMI, based on ATLANTIC trial results. Purpose This study aims to evaluate the effect of DAPT with potent P2Y12i pretreatment DAPT in STEMI patients, comparing with DAPT with clopidogrel and aspirin only pretreatment. Methods We have analyzed the antiplatelet pretreatment strategy results of a retrospective cohort of 2283 STEMI patients, from a multicenter national registry, from 2011 till 2019. We compared 3 groups: DAPT with potent P2Y12i, DAPT with clopidogrel and aspirin only. Primary endpoints were death, major adverse cardiovascular events (MACE), including reinfarction, heart failure, sustained ventricular arrhythmia, cardiogenic shock, mechanical complication and stroke, and successful PCI. Safety endpoint was major hemorrhagic events between different strategies. Results A total of 2283 STEMI patients where included, with a mean age of 66±13 years and 27% (n=627) were female. The population was divided in 3 groups, according with pretreatment strategy: DAPT with potent P2Y12i, DAPT with clopidogrel and aspirin only. 334 patients undergone DAPT with potent P2Y12i, and 86% (n=296) had a successful PCI, 21% (n=69) had a MACE and 9% (n=31) died in hospital. The group of patients submitted to DAPT with clopidogrel were 1815, and 80% (n=1448) had a successful PCI, 29% (n=527) had a MACE and 11,5% (n=209). The group pretreated only with aspirin were 124 patients, of which, only 14% (n=17) had a successful PCI, 38% (n=47) had a MACE and 39% (n=49) died. Regarding safety outcomes, 1,5% (n=5) patients with DAPT with potent P2Y12i had a significant hemorrhage, comparing with 3% (n=53) of patients with DAPT with clopidogrel and 3% (n=4) of aspirin only group of patients. There was a statistically significant higher rate of successful PCI with DAPT with potent P2Y12i (p&amp;lt;0,05 OR 2), a statistically significant lower number of MACE (p&amp;lt;0,05 OR 0,6) and in hospital deaths (p=0,04 OR 0,67), comparing with DAPT with clopidogrel and aspirin only groups. There was no statistically significant difference between groups in terms of hemorrhagic events (p=0,7). According to our retrospective multicenter national registry, pretreatment with potent P2Y12i is associated with better results, namely higher rate of successful PCI, less MACE and in hospital death, contrary to recent trials. Our study has some bias: the pretreatment with DAPT was standard of care during the registry, and the choice for aspirin only strategy might be due to higher risk patients, as the choice was not randomized.Antiplatelet treatment comparison

P2Y12 monotherapy versus standard dual antiplatelet therapy after percutaneous coronary intervention: a systematic review and meta-analysis

Abstract Funding Acknowledgements None. Introduction Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 receptor inhibitor after percutaneous coronary intervention (PCI) is the recommended therapy for lowering the ischemic risk among patients with acute coronary syndrome (ACS). However, the increased incidence of bleeding is a major concern. Monotherapy with a P2Y12 inhibitor after short-term DAPT to reduce adverse cardiovascular events and bleeding rates has not been fully established and remains uncertain. This meta-analysis aims to determine the effectiveness of P2Y12 inhibitor monotherapy after short-term DAPT in reducing cardiovascular and bleeding events. Methods A comprehensive search of randomized controlled trials (RCTs) examining the use of short-term DAPT followed by P2Y12 monotherapy in patients with ACS who underwent PCI was conducted. Outcome measures for all-cause mortality, myocardial infarction, and bleeding rates were analyzed using a random-effects model via Review Manager V5.4. Results A total of six randomized controlled trials (RCTs) with 36,724 subjects were analyzed. There were no significant differences in all-cause mortality (RR 0.89 [95% CI: 0.78-1.02], I² = 0%, p = 0.10) and myocardial infarction (RR 1.00 [95% CI: 0.88-1.14], I² = 0%, p = 0.72) between the P2Y12 inhibitor group and dual antiplatelet therapy (DAPT) group. There was a lower rate of major bleeding in the P2Y12 group compared to the DAPT group (RR 0.65 [95% CI: 0.49-0.88], I² = 76%, p = 0.002). The major sources of substantial heterogeneity are due to different intervals of de-escalation and baseline risk factors prior to PCI in each study. Conclusion P2Y12 monotherapy has similar rates of all-cause mortality and myocardial infarction. However, early de-escalation leads to a lower incidence of bleeding. P2Y12 monotherapy showed a 35% decreased risk of bleeding compared to the DAPT strategy. This suggests that P2Y12 monotherapy is a preferable antiplatelet strategy in patients undergoing PCI, especially in the high-risk bleeding population.