Publications by authors named "Dean Chan Pin Yin"

Aims: A genotype-guided P2Y12-inhibitor de-escalation strategy, switching acute coronary syndrome (ACS) patients without a CYP2C19 loss-of-function allele from ticagrelor or prasugrel to clopidogrel, has shown to reduce bleeding risk without affecting effectivity of therapy by increasing ischemic risk. We estimated the cost-effectiveness of this personalized approach compared to standard dual antiplatelet therapy (DAPT; aspirin plus ticagrelor/prasugrel) in the Netherlands.

Methods And Results: We developed a one-year decision tree based on results of the FORCE-ACS registry, comparing a cohort of ACS patients who underwent genotyping with a cohort of ACS patients treated with standard DAPT.

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  • The study investigates the frequency and reasons for changes in ticagrelor treatment among patients with acute coronary syndrome (ACS), revealing that many patients discontinue it prematurely.
  • Data from over 4,200 patients showed that 26.7% had physician-recommended discontinuations and 20.1% had alterations in their treatment within a year.
  • Treatment interruptions and disruptions significantly increased the risk of serious heart-related issues, while discontinuation and alterations did not show the same level of risk.
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Background: Accurate bleeding risk stratification after percutaneous coronary intervention (PCI) is important for treatment individualization. However, there is still an unmet need for a more precise and standardized identification of high bleeding risk patients. We derived and validated a novel bleeding risk score by augmenting the PRECISE-DAPT score with the Academic Research Consortium for High Bleeding Risk (ARC-HBR) criteria.

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  • The study investigated whether using CYP2C19 genetic testing to guide medication choices improves outcomes for patients with acute coronary syndrome (ACS) compared to standard treatment.
  • Out of 5,321 ACS patients, those who were genotyped and had their medications tailored showed significantly lower bleeding rates while maintaining a similar risk of ischemic events compared to those on standard therapy.
  • The findings suggest that a personalized approach to antiplatelet therapy based on genetic markers can enhance safety without compromising efficacy in managing ACS.
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Background: Acute coronary syndrome (ACS) is frequently accompanied by newly diagnosed atrial fibrillation (AF).

Aims: We aimed to compare the risk of major adverse cardiovascular events (MACE) in ACS patients presenting with known, newly diagnosed, or no AF.

Methods: In our multicentre, prospective registry study, we included patients with confirmed ACS.

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  • The study compares ambulance paramedics' use of the modified HEART-score with point-of-care cardiac troponin testing to emergency physicians' use of the same score with high-sensitive cTn in patients suspected of having non-ST-elevation acute coronary syndrome (NSTE-ACS).
  • It evaluates the interobserver agreement and diagnostic performance of four different cTn testing strategies, aiming to improve the accuracy of NSTE-ACS diagnoses and reduce unnecessary hospitalizations.
  • The POPular HEART study seeks to enhance pre-hospital detection of NSTE-ACS, ultimately aiming to lower healthcare costs and improve patient outcomes.
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Background: Guidelines recommend prasugrel or ticagrelor for acute coronary syndrome (ACS) patients. However, these P2Y inhibitors increase bleeding risk compared to clopidogrel. Although genotype-guided P2Y-inhibitor selection has been shown to reduce bleeding risk, data on its clinical implementation is lacking.

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Objective: We describe the current treatment of elderly patients with non-ST-elevation myocardial infarction (NSTEMI) enrolled in a national registry.

Methods: The POPular AGE registry is a prospective, multicentre study of patients ≥ 75 years of age presenting with NSTEMI, performed in the Netherlands. Management was at the discretion of the treating physician.

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This registry assessed the impact of conservative and invasive strategies on major adverse clinical events (MACE) in elderly patients with non-ST-elevation myocardial infarction (NSTEMI). Patients aged ≥75 years with NSTEMI were prospectively registered from European centers and followed up for one year. Outcomes were compared between conservative and invasive groups in the overall population and a propensity score-matched (PSM) cohort.

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Objective: Patients with acute coronary syndrome (ACS) remain at high risk for recurrent ischaemic and bleeding events during follow-up. Our study aimed to quantify and compare the impact of these adverse events on quality of life (QoL).

Methods: Data from patients with ACS prospectively enrolled in the FORCE-ACS registry between January 2015 and December 2019 were used for this study.

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Article Synopsis
  • The study aimed to assess the clinical efficacy and side effects of ticagrelor in patients with varying CYP3A5 gene status, specifically looking at thrombotic and bleeding events, as well as dyspnea.
  • A total of 1,281 STEMI patients were genotyped, revealing no significant differences in thrombotic or bleeding outcomes between carriers and non-carriers of the gene, nor between CYP3A5 expressors and non-expressors.
  • Overall, ticagrelor showed no statistical significance in affecting thrombotic events, bleeding rates, or dyspnea among the different genetic groups studied.
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  • European guidelines now recommend dual antithrombotic therapy (DAT) over triple antithrombotic therapy (TAT) for patients on oral anticoagulants undergoing coronary interventions, focusing on P2Y inhibitors and OAC without aspirin.
  • The WOEST 2 registry was conducted to analyze the effectiveness and safety of these therapies in real-world settings, specifically looking at bleeding and thrombotic outcomes after one year.
  • Results showed that DAT significantly reduced clinically relevant bleeding risks compared to TAT, while outcomes related to major adverse cardiac and cerebrovascular events were similar between both groups.
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Objectives: To validate the Global Registry of Acute Coronary Events (GRACE) risk score and examine the extent and impact of the risk-treatment paradox in contemporary patients with acute coronary syndrome (ACS).

Methods: Data from 5015 patients with ACS enrolled in the FORCE-ACS registry between January 2015 and December 2019 were used for model validation. The performance of the GRACE risk score for predicting in-hospital and 1-year mortality was evaluated based on indices of model discrimination and calibration.

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Dual antiplatelet therapy has long been the standard of care in preventing coronary and cerebrovascular thrombotic events in patients with chronic coronary syndrome and acute coronary syndrome undergoing percutaneous coronary intervention, but choosing the optimal treatment duration and composition has become a major challenge. Numerous studies have shown that certain patients benefit from either shortened or extended treatment duration. Furthermore, trials evaluating novel antithrombotic strategies, such as P2Y12 inhibitor monotherapy, low-dose factor Xa inhibitors on top of antiplatelet therapy, and platelet function- or genotype-guided (de-)escalation of treatment, have shown promising results.

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Diagnostic and treatment strategies for acute coronary syndrome have improved dramatically over the past few decades, but mortality and recurrent myocardial infarction rates remain high. An aging population with increasing co-morbidities heralds new clinical challenges. Therefore, in order to evaluate and improve current treatment strategies, detailed information on clinical presentation, treatment and follow-up in real-world patients is needed.

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Article Synopsis
  • Risk scores are key tools used in assessing patients with acute coronary syndrome (ACS) to predict the likelihood of adverse cardiac events and guide treatment options based on their risk level.
  • Initial assessments help decide whether low-risk patients can be discharged or if high-risk patients need immediate care.
  • The review highlights important risk scores that have evolved over the years to aid in managing ACS patients both during and after hospitalization.
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Background: The effect of single as compared with dual antiplatelet treatment on bleeding and thromboembolic events after transcatheter aortic-valve implantation (TAVI) in patients who do not have an indication for long-term anticoagulation has not been well studied.

Methods: In a randomized, controlled trial, we assigned a subgroup of patients who were undergoing TAVI and did not have an indication for long-term anticoagulation, in a 1:1 ratio, to receive aspirin alone or aspirin plus clopidogrel for 3 months. The two primary outcomes were all bleeding (including minor, major, and life-threatening or disabling bleeding) and non-procedure-related bleeding over a period of 12 months.

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Background: Approximately 15% of saphenous vein grafts (SVGs) occlude during the first year after coronary artery bypass graft surgery (CABG) despite aspirin use. The POPular CABG trial (The Effect of Ticagrelor on Saphenous Vein Graft Patency in Patients Undergoing Coronary Artery Bypass Grafting Surgery) investigated whether ticagrelor added to standard aspirin improves SVG patency at 1 year after CABG.

Methods: In this investigator-initiated, randomized, double-blind, placebo-controlled, multicenter trial, patients with ≥1 SVGs were randomly assigned (1:1) after CABG to ticagrelor or placebo added to standard aspirin (80 mg or 100 mg).

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Background: The roles of anticoagulation alone or with an antiplatelet agent after transcatheter aortic-valve implantation (TAVI) have not been well studied.

Methods: We performed a randomized trial of clopidogrel in patients undergoing TAVI who were receiving oral anticoagulation for appropriate indications. Patients were assigned before TAVI in a 1:1 ratio not to receive clopidogrel or to receive clopidogrel for 3 months.

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A new collagen-based MANTA vascular closure device (VCD) was developed for closing large-bore arteriotomies after transfemoral transcatheter aortic valve implantation (TAVI). We evaluated safety and feasibility at 30-day follow-up in terms of vascular and bleeding complications and mortality of the collagen-based MANTA VCD compared with the suture-based Prostar XL VCD in a cohort of 366 patients who underwent transfemoral TAVI between January 2015 and April 2018. The MANTA VCD was used in 168 patients and the Prostar XL VCD in 198 patients, with successful closure of 98.

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Background: Advanced atrial fibrillation (AF) patients have persistent AF, failed previous catheter ablation and/or an enlarged left atrium (LA), which is associated with a reduced success of AF ablation. Transthoracic echocardiography (TTE) and contrast enhanced magnetic resonance angiography (CE-MRA) are available to assess LA volume. However, it is unknown how these modalities relate in patients with advanced AF.

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Aims: Galectin-3 (Gal-3) is an important mediator of cardiac fibrosis, particularly in heart failure. Increased Gal-3 concentration (Gal-3), associated with increased risk of developing atrial fibrillation (AF), may reflect atrial fibrotic remodelling underlying AF progression. We aimed to investigate whether the change in serum Gal-3 reflects alterations of the arrhythmogenic atrial substrate following thoracoscopic AF surgery, and predicts absence of AF.

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Background: Patients with long duration of atrial fibrillation (AF), enlarged atria, or failed catheter ablation have advanced AF and may require more extensive treatment than pulmonary vein isolation.

Objectives: The aim of this study was to investigate the efficacy and safety of additional ganglion plexus (GP) ablation in patients undergoing thoracoscopic AF surgery.

Methods: Patients with paroxysmal AF underwent pulmonary vein isolation.

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