Coronary stenting versus balloon angioplasty for acute myocardial infarction: A meta-regression analysis of randomized trials

Sirolimus-coated balloon in acute and chronic coronary syndromes: the PEACE study, a subanalysis of the EASTBOURNE registry

INTRODUCTION AND OBJECTIVES

The PEACE study (Performance of a sirolimus-eluting balloon strategy in acute and chronic coronary syndromes) investigated for the first time whether a sirolimus-coated balloon (SCB) (Magic Touch, Concept Medical, India) is associated with different outcomes depending on whether it is used in acute coronary syndromes (ACS) or chronic coronary syndromes (CCS).

METHODS

This was a post-hoc analysis from the all-comers EASTBOURNE Registry (NCT03085823). Out of 2083 patients enrolled, an SCB was used to treat 968 (46.5%) ACS and 1115 (53.5%) CCS patients. The primary endpoint was target lesion revascularization at 12 months, while secondary endpoints were angiographic success and major adverse cardiovascular events.

RESULTS

Baseline demographics, mean reference vessel diameter and mean lesion length were comparable between ACS and CCS. Predilatation was more commonly performed in ACS (P=.007). SCB was inflated at a standard pressure in both groups with a slight trend toward longer inflation time in ACS. Angiographic success was high in both groups (ACS 97.4% vs CCS 97.7%, P=.820) with limited bailout stenting. Similarly, at 12 months the cumulative incidence of target lesion revascularization (ACS 6.6% vs CCS 5.2%, P=.258) was comparable between ACS and CCS. Conversely, a higher rate of major adverse cardiovascular events in acute presenters was mainly driven by myocardial infarction recurrencies (ACS 10.4% vs CCS 8.3%, P=.009). In-stent restenosis showed a higher proportion of target lesion revascularization and major adverse cardiovascular events than de novo lesions, independently of the type of presentation at the index procedure.

CONCLUSIONS

This SCB shows good performance in terms of acute and 1-year outcomes independently of the clinical presentation.

Drug-coated balloons versus drug-eluting stents in patients with acute myocardial infarction undergoing percutaneous coronary intervention: an updated meta-analysis with trial sequential analysis

BACKGROUND

Drug-coated balloons (DCBs) are an established strategy for coronary artery disease. However, the new generation drug-eluting stent (DES) is recommended for patients with Acute myocardial infarction (AMI) for coronary artery revascularization. Our aim is to provide a comprehensive appraisal of the efficacy of DCBs in patients with AMI undergoing PCI.

METHODS

We searched the WOS, PubMed, Scopus, and Cochrane CENTRAL till March 2023, for studies that compared DCBs versus DES in patients with AMI undergoing PCI. We used a random-effects model to compare major adverse cardiac events (MACE), cardiac death, all-cause death, myocardial infarction, target lesion revascularization (TLR), stent thrombosis, Late lumen Loss (LLL), and minimum lumen diameter (MLD) between the two groups.

RESULTS

Thirteen studies comprising 2644 patients were included. The pooled OR showed non-inferiority of DCB over DES in terms of MACE (OR = 0.89, 95% CI [0.57 to 1.40], p = 0.63). When we defined MACE as a composite of cardiac death, MI, and TLR; the pooled OR favored DCB over DES (OR = 0.50, 95% CI [0.28 to 0.9], p = 0.02). Moreover, DCB was not inferior to DES in terms of all-cause mortality (OR = 0.88, 95% CI: 0.43 to 1.8, p = 0.73), cardiac mortality, (OR = 0.59, 95% CI: 0.22 to 1.56, p = 0.29), MI (OR = 0.88, 95% CI: 0.34 to 2.29, p = 0.79), stent thrombosis (OR = 1.21, 95% CI: 0.35 to 4.23, p = 0.76), TLR (OR = 0.9, 95% CI: 0.43 to 1.93, p = 0.8), LLL (MD = -0.6, 95% CI: -0.3 to 0.19, p = 0.64), or MLD (MD = -0.4, 95% CI: -0.33 to 0.25, p = 0.76).

CONCLUSION

Our meta-analysis indicated that DCB intervention was not inferior to DES in the PCI setting in patients with AMI, and can be recommended as a feasible strategy in AMI.

PROSPERO REGISTRATION

CRD42023412757.

Drug-Coated Balloons for Acute Myocardial Infarction: A Metaanalysis of Randomized Clinical Trials

Background

The role of a drug-coated balloon (DCB) in the treatment of acute myocardial infarction (AMI) is not well established.

Methods

Five databases were searched for randomized controlled trials that compared DCB with stents in the treatment of AMI from their inception to 30 July 2021. The primary clinical endpoint was major adverse cardiac events (MACEs). Summary estimations were conducted using fixed-effects analysis complemented by several subgroups. The protocol was registered with PROSPERO (https://clinicaltrials.gov/ct2/show/CRD42021272886).

Results

A total of 4 randomized controlled trials with 485 patients were included. On routine clinical follow-up, DCB was associated with no difference in the incidence of MACEs compared with control (risk ratio [RR] 0.59 [0.31 to 1.13]; P=0.11). DCB was associated with similar MACEs compared with drug-eluting stent and lower MACEs compared with bare-metal stent. There was no difference between DCB and control in terms of all-cause mortality, cardiovascular mortality, stent thrombosis, target lesion revascularization, and minimal lumen diameter during follow-up. However, DCB was associated with a lower incidence of myocardial infarction (RR 0.16 [0.03 to 0.90]; P=0.04) and lower late lumen loss (mean difference -0.20 [-0.27 to -0.13]; P < 0.00001).

Conclusions

In treatment of patients with AMI, DCB might be a feasible interventional strategy versus control as it associated with comparable clinical outcomes. Future large-volume, well-designed randomized controlled trials to evaluating the role of the DCB in this setting are warranted.

Computational Pressure-Fluid Dynamics Applied to Index of Microcirculatory Resistance, Predicting the Prognosis of Drug-Coated Balloons Compared With Drug-Eluting Stents in STEMI Patients

Background: The impairment of microvascular injury on prognosis has increasingly drawn extensive awareness along with the high morbidity and mortality of ST-segment elevation myocardial infarction (STEMI) over recent years. The prognostic significance of computational pressure-fluid dynamics applied to index of microcirculatory resistance, derived from coronary angiography (CPFD-caIMR) in microvascular injury evaluation of STEMI patients remained inconclusive.

Methods: A total of 213 patients who met the inclusion criteria were selected retrospectively from 1003 STEMI patients from February 2018 to February 2020. Propensity score matching (PSM) was thereafter finished. CPFD-caIMR of all patients was obtained off-line using the software (FlashAngio, Rainmed Ltd., Suzhou, China) after PPCI. The primary endpoint was to compare the CPFD-caIMR and the incidence of major adverse cardiovascular events (MACEs) between drug-coated balloons (DCB) and drug-eluting stents (DES) groups. The correlation between CPFD-caIMR and MACEs was analyzed, and the prognosis of patients with STEMI was evaluated by CPFD-caIMR by multivariate regression analysis.

Results: Totally 213 STEMI patients with successful primary percutaneous coronary intervention (PPCI) were included, of whom 84 patients accepted DCB and 129 patients accepted DES respectively. Baseline characteristics and CPFD-caIMR were comparable between DCB and DES groups after PSM (62 patients in each group). CPFD-caIMR was not significantly different between two groups (DES vs. DCB: mean difference: 2.26, 95% CI -4.05 to 8.57, p = 0.45), and so was it when re-grouped by whether CPFD-caIMR > 40U or not (DES vs. DCB: 34.17% vs. 27.16%, p = 0.29). After a follow-up of 1 year, more MACEs occurred in DES group than DCB group (relative risk: 2.50, 95% CI 1.04 to 6.02, p = 0.04). The predictors of MACEs by multi-variate analysis found that, only time from symptom to balloon (p = 0.03) and time from door to balloon (p < 0.01) were independent predictors of MACEs, independent of treatment with DCB or DES intervention. Furthermore, CPFD-caIMR > 40U became an independent predictor of the combined events including cardiovascular deaths or heart failure readmission irrespective of PSM (odds ratio: 4.07, 95% CI: 1.06 to 7.66, p = 0.04).

Conclusion: CPFD-caIMR was a promising method for prognosis, which can predict CV death or heart failure readmission in STEMI patients. DCB was a possible strategy in PPCI of STEMI patients, not inferior to DES based on microvascular injury evaluated by CPFD-caIMR.

Efficacy and safety of drug-coated balloon in the treatment of acute myocardial infarction: a meta-analysis of randomized controlled trials

Acute myocardial infarction (AMI) is one of the main causes of death in the world, and the incidence of AMI is increasing in the young population. Drug-coated balloon (DCB) has become an effective concept for the treatment of in-stent restenosis, small vessel disease, bifurcation lesions, high blood risk conditions, and even de novo large vessel disease. To ensure whether DCB can play an alternative role in AMI, we conducted a comprehensive meta‐analysis of randomized controlled trials (RCTs) to evaluate the efficacy and safety of DCB in the treatment of AMI. Electronic databases were searched for RCTs that compared DCB with stent for AMI. The primary outcome was major adverse cardiac events (MACEs), the secondary outcome was late lumen loss (LLL). RevMan 5.3 software and RStudio software were used for data analysis. Five RCTs involving 528 patients with 6–12 months of follow-up were included. There was no significant difference in the incidence of MACEs between DCB group and stent group (RR, 0.85; 95% CI 0.42 to 1.74; P = 0.66). Lower LLL was shown in DCB group (WMD, − 0.29; 95% CI − 0.46 to − 0.12; P < 0.001). This meta-analysis of RCT showed that DCB might provide a promising way on AMI compared with stents. Rigorous patients’ selection and adequate predilation of culprit lesions are necessary to optimize results and prevent bailout stent implantation.

PROSPERO registration number: CRD42020214333.

CVIT expert consensus document on primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI) update 2022

Primary Percutaneous Coronary Intervention (PCI) has significantly contributed to reducing the mortality of patients with ST-segment elevation myocardial infarction (STEMI) even in cardiogenic shock and is now the standard of care in most of Japanese institutions. The Task Force on Primary PCI of the Japanese Association of Cardiovascular Interventional and Therapeutics (CVIT) society proposed an expert consensus document for the management of acute myocardial infarction (AMI) focusing on procedural aspects of primary PCI in 2018. Updated guidelines for the management of AMI were published by the European Society of Cardiology (ESC) in 2017 and 2020. Major changes in the guidelines for STEMI patients included: (1) radial access and drug-eluting stents (DES) over bare-metal stents (BMS) were recommended as a Class I indication, (2) complete revascularization before hospital discharge (either immediate or staged) is now considered as Class IIa recommendation. In 2020, updated guidelines for Non-ST-Elevation Myocardial Infarction (NSTEMI) patients, the followings were changed: (1) an early invasive strategy within 24 h is recommended in patients with NSTEMI as a Class I indication, (2) complete revascularization in NSTEMI patients without cardiogenic shock is considered as Class IIa recommendation, and (3) in patients with atrial fibrillation following a short period of triple antithrombotic therapy, dual antithrombotic therapy (e.g., DOAC and single oral antiplatelet agent preferably clopidogrel) is recommended, with discontinuation of the antiplatelet agent after 6 to 12 months. Furthermore, an aspirin-free strategy after PCI has been investigated in several trials those have started to show the safety and efficacy. The Task Force on Primary PCI of the CVIT group has now proposed the updated expert consensus document for the management of AMI focusing on procedural aspects of primary PCI in 2022 version.

New Ultrasound-Controlled Paclitaxel Releasing Balloon vs. Asymmetric Drug-Eluting Stent in Primary ST-Segment Elevation Myocardial Infarction - A Prospective Randomized Trial

BACKGROUND

Application of drug-coated balloons (DCBs) is popular for the treatment of percutaneous coronary intervention (PCI). A new DCB has been designed as ultrasound-controlled paclitaxel releasing. This study was conducted to determine whether a DCB-only strategy has a similar safety profile and equal angiographic and clinical outcomes to DES implantation in primary ST-elevation myocardial infarction (STEMI) patients, as well as determine the efficiency and safety of this new DCB.Methods and Results:Overall, 184 pretreated STEMI patients were randomized into DCB and DES groups with a 1:1 allocation. The main study end-point was late lumen loss (LLL) during the 9 months after PCI. Late lumen loss was reported to be 0.24±0.39 mm in the DCB group and 0.31±0.38 mm in the DES group (P=0.215). Diameter stenosis was 28.27±15.35% in the DCB group and 25.73±15.41% in the DES group (P=0.312). Major adverse cardiovascular events (MACEs) were reported in 3 patients (3.4%) in the DCB group and 4 patients (4.7%) in the DES group (P=0.718). TLR and TVR in the DCB group was 2.3%, 3.4% and 2.4%, 3.5% in the DES group (P=1.000), respectively. No cardiac death and stent thrombosis (ST) was found in the DCB group at 12 months clinical follow up.

CONCLUSIONS

The DCB-only strategy showed good angiographic and clinical outcomes in the 9- and 12-month follow-up periods, respectively. The VasoguardTM DCB is safe and feasible to treat STEMI patients.

Study on the safety and effectiveness of drug-coated balloons in patients with acute myocardial infarction

BACKGROUND

Drug-coated balloon (DCB) is a new technology that has emerged in recent years and has been proven to be effective and safe in the treatment of in-stent restenosis. The purpose of this article is to observe the safety and effectiveness of drug-coated balloons in patients with acute myocardial infarction.

METHOD

We selected 80 patients admitted to the hospital for STEMI from January 2018 to December 2019. The subjects were randomly divided into a Yinyi (Liaoning) Biotech Bingo Drug Coated Balloon treatment group (balloon group, n  = 38) and a drug-eluting stent (DES) treatment group (stent group, n  = 42). Patients were followed up to understand the incidence of major adverse cardiovascular events (MACE) at 1 month, 6 months and 1 year after surgery. Coronary angiography was rechecked 1 year after surgery to understand the late lumen loss (LLL) in the two groups.

RESULT

During the one-year follow-up, the LLL of the target lesion in the balloon group was -0.12±0.46 mm, while the target lesion in the stent group was 0.14±0.37 mm ( P  <0.05). Within 1 year, the incidence of MACE in the balloon group was 11%, while the incidence of MACE in the stent group was 12%. There was no significant difference between the two groups.

IN CONCLUSION

When PCI is used for STEMI, only DCB therapy is safe and effective, and has shown good clinical effects during a one-year follow-up period.

A brief introduction of meta-analyses in clinical practice and research

With the explosive growth of medical information, it is almost impossible for healthcare providers to review and evaluate all relevant evidence to make the best clinical decisions. Meta‐analyses, which summarize all existing evidence and quantitatively synthesize individual studies, have become the best available evidence for informing clinical practice. This article introduces the common methods, steps, principles, strengths and limitations of meta‐analyses and aims to help healthcare providers and researchers obtain a basic understanding of meta‐analyses in clinical practice and research.

Systematic review and meta-analysis of short-term outcomes with drug-coated balloons vs. stenting in acute myocardial infarction

The role of drug-coated balloons (DCBs) in patients with acute myocardial infarction (AMI) remains controversial. We performed a meta-analysis of all published studies comparing the outcomes of DCBs vs. stenting in AMI patients. Four studies with 497 patients (534 lesions) were included (three randomized controlled trials and one observational study). During a mean follow-up of 9 months (range 6-12 months), DCBs were associated with similar risk of major adverse cardiovascular events (5% vs. 4.4%; OR 1.24, 95% CI: [0.34, 4.51], p = 0.74, I² = 35%), all-cause mortality (0.02% vs. 0.04%; OR 077, 95% CI: [0.15, 3.91], p = 0.75, I² = 25%), cardiac death (0.01% vs. 0.02%; OR 0.64, 95% CI: [0.16, 2.64], p = 0.54), myocardial infarction (0% vs. 1.4%; OR 0.18, 95% CI: [0.01, 3.56], p = 0.26), and target lesion revascularization (3.7% vs. 2%; OR 1.74, 95% CI: [0.42, 7.13], p = 0.44, I² = 17%) compared with stenting. During a mean follow-up of 7 months (range 6-9 months), DCBs had similar late lumen loss compared with stenting (mean difference 0.04 mm, 95% CI [- 0.21-0.28], p = 0.77, I² = 92%). In patients with AMI, there was no statistical difference in the incidence of clinical and angiographic outcomes between AMI patients treated with DCB and DES. Larger studies with longer-term follow-up are needed to assess the clinical utility of DCBs in this setting.

Provisional drug-coated balloon treatment guided by physiology on de novo coronary lesion

Although drug-eluting stents (DES) have become the mainstay of percutaneous coronary intervention, late and very late stent thrombosis remains a concern. Drug-coated balloons (DCB) have the advantage of preserving the anti-restenotic benefits of DES while minimizing potential long-term safety concerns. Currently the two methods to ensure successful DCB treatment of a stenotic lesion are angiography or physiology-guided DCB application. This review will evaluate these two methods based on previous evidence and make suggestions on how to perform DCB treatment more efficiently and safely.

Coronary artery bypass vs percutaneous coronary intervention in under 50s

BACKGROUND

Young patients with coronary artery disease are undergoing percutaneous coronary intervention (PCI) primarily, with a view to deferring coronary artery bypass grafting (CABG). We investigated the validity of this approach, by comparing outcomes in patients ≤50 years undergoing CABG or PCI.

METHODS

One hundred consecutive patients undergoing PCI and 100 undergoing CABG in 2004 were retrospectively studied to allow for 5 and 12 years follow-up. The two groups were compared for the primary endpoints of major adverse cardiac or cerebrovascular event (MACCE).

RESULTS

Diabetes, peripheral vascular disease, and left ventricular ejection fraction <50% were higher in the CABG group. At 5 years, rates of myocardial infarction (MI) (9% vs 1%, P = .02), repeat revascularization (31% vs 7%, P < .01), and MACCE (34 vs 12, P < .01) were greater in the PCI vs the CABG group. Similarly, at 12 years, rates of MI (27.4% vs 19.4%, P = .19), repeat revascularization (41.1% vs 20.4%, P < .01), and MACCE (51 vs 40, P = .07) were greater in the PCI group. There were no differences in major outcomes in patients with 1 or 2VD, at 5 or 12 years. Rates of MI, revascularization, and MACCE were higher in patients with 3VD undergoing PCI (n = 21; MI, 47.6%; revascularization, 66.7%; and MACCE, 19 events) vs CABG (n = 78; MI, 19.2%; revascularization, 20.5%; and MACCE, 31 events); P < .01, for all end points.

CONCLUSIONS

MACCE was lower in young patients undergoing CABG vs PCI at both 5 and 12 years follow-up, primarily as a consequence of patients with 3VD undergoing PCI having more MI and repeat revascularization. CABG should remain the preferred method of revascularization in young patients with 3VD.

Drug-coated balloon treatment in coronary artery disease: Recommendations from an Asia-Pacific Consensus Group

Coronary artery disease (CAD) is currently the leading cause of death globally, and the prevalence of this disease is growing more rapidly in the Asia-Pacific region than in Western countries. Although the use of metal coronary stents has rapidly increased thanks to the advancement of safety and efficacy of newer generation drug eluting stent (DES), patients are still negatively affected by some the inherent limitations of this type of treatment, such as stent thrombosis or restenosis, including neoatherosclerosis, and the obligatory use of dual antiplatelet therapy (DAPT) with unknown optimal duration. Drug-coated balloon (DCB) treatment is based on a leave-nothing-behind concept and therefore it is not limited by stent thrombosis and long-term DAPT; it directly delivers an anti-proliferative drug which is coated on a balloon after improving coronary blood flow. At present, DCB treatment is recommended as the first-line treatment option in metal stent-related restenosis linked to DES and bare metal stent. For de novo coronary lesions, the application of DCB treatment is extended further, for conditions such as small vessel disease, bifurcation lesions, and chronic total occlusion lesions, and others. Recently, several reports have suggested that fractional flow reserve guided DCB application was safe for larger coronary artery lesions and showed good long-term outcomes. Therefore, the aim of these recommendations of the consensus group was to provide adequate guidelines for patients with CAD based on objective evidence, and to extend the application of DCB to a wider variety of coronary diseases and guide their most effective and correct use in actual clinical practice.

Paclitaxel-Coated Balloon Angioplasty Versus Drug-Eluting Stent in Acute Myocardial Infarction: The REVELATION Randomized Trial

OBJECTIVES

This study sought to assess the efficacy and safety of a drug-coated balloon (DCB) strategy versus drug-eluting stent (DES) in primary percutaneous coronary intervention for ST-segment elevation myocardial infarction (STEMI).

BACKGROUND

In primary percutaneous coronary intervention for STEMI, stenting has proved to be beneficial with regard to repeat revascularization, but not recurrent myocardial infarction or death, compared with balloon angioplasty alone. A strategy of DCB angioplasty without stenting might abolish the potential disadvantages of stent implantation while reducing the probability of restenosis observed in plain old balloon angioplasty.

METHODS

In the prospective, randomized, single-center REVELATION trial, we compared DCB with DES in patients presenting with STEMI. Patients with a new, nonseverely calcified culprit lesion in a native coronary artery and a residual stenosis of <50% after pre-dilatation were randomized to treatment with a DCB or DES. The primary endpoint was fractional flow reserve at 9 months, allowing for a functional measurement of the infarct-related lesion.

RESULTS

A total of 120 patients were included. At 9 months after enrolment, the mean fractional flow reserve value was 0.92 ± 0.05 in the DCB group (n = 35) and 0.91 ± 0.06 in the DES group (n = 38) (p = 0.27). One abrupt vessel closure requiring treatment occurred after treatment with DCB. Up to 9-months follow-up, 2 patients required nonurgent target lesion revascularization (1 in each group).

CONCLUSIONS

In the setting of STEMI, the DCB strategy was noninferior to DES in terms of fractional flow reserve assessed at 9 months. Furthermore, it seemed to be a safe and feasible strategy. (Revascularization With Paclitaxel-Coated Balloon Angioplasty Versus Drug-Eluting Stenting in Acute Myocardial Infarction [REVELATION]; NCT02219802).

Balloon-mounted stents for acute intracranial large vessel occlusion secondary to presumed atherosclerotic disease: evolution in an era of supple intermediate catheters

Introduction

Treatment of acute large vessel occlusion (LVO) stroke secondary to intracranial atherosclerotic disease (ICAD) is more nuanced with disparate and infrequently reported outcomes. The deployment of balloon-mounted stents presents an expedient approach with renewed feasibility in the modern era of supple intermediate catheters.

Methods

A prospectively maintained endovascular stroke database was searched for patients undergoing intracranial stenting with balloon-mounted stents for acute LVO. Demographic, angiographic, and clinical data were extracted to determine procedural technique and success, measured both angiographically and clinically.

Results

Sixty patients underwent stenting for acute LVO secondary to ICAD. Mean presenting National Institutes of Health Stroke Scale (NIHSS) score was 18 and 62% of treated sites were in the posterior circulation. Cases were performed under IV conscious sedation unless the patient was already intubated. Successful recanalization was achieved in 93% of cases (Thrombolysis in Cerebral Infarction (TICI) grade 2b in 48% and TICI grade 3 in 45%). Mean improvement in NIHSS score on post-procedure day 1 was 3.4. Good outcome (modified Rankin Scale score 0–2) at 3 months was 34% and the mortality rate was 34%. The rate of peri-procedural symptomatic hemorrhage was 8% and the rate of acute/subacute stent thrombosis was 7%. In this small cohort, patient age, sex, presenting NIHSS, comorbidities, smoking, tissue plasminogen activator administration, and stent location were not significant predictors of recanalization or good outcome.

Conclusion

Treatment of acute LVO stroke with balloon-mounted stents for ICAD has reperfusion rates and clinical outcomes comparable to thrombectomy, with higher rates of hemorrhage and mortality. Because stent placement was performed after attempted thrombectomy, a trial of primary stenting versus thrombectomy should be considered in patients suspected of underlying ICAD.

Deflated Balloon-Facilitated Direct Stenting in Primary Angioplasty (The DBDS Technique): A Pilot Study

Background

Several studies and meta-analyses have shown that direct stenting (DS) may improve clinical outcomes in patients with acute ST-elevation myocardial infarction (STEMI). But in most cases, the thrombolysis in myocardial infarction (TIMI) flow remains ≤ 1 after wire placement. We used deflated balloon to facilitate DS in patients with totally occluded culprit arteries. The aim of this study was to evaluate the feasibility, safety and outcomes of this novel technique in patients with STEMI in real-world clinical practice.

Methods

This was a prospective, observational, single-center pilot study. From September 2016 to June 2018, 454 patients were enrolled in the study. DS was performed when the culprit vessel was visualized with at least TIMI flow grade 1. Patients with complete occlusion of the vessel after wire placement were subjected to deflated balloon-facilitated DS technique (DBDS technique) and DS was done wherever possible.

Results

DS was done in 74% (n = 336) of the patients and 26% (n = 118) patients received stenting after pre-dilatation (PD). DBDS technique to facilitate DS was successful in 68% patients (211/309). Final TIMI 3 flow was achieved more frequently in the DS group as compared to PD group (96.7% versus 92.3%, P = 0.04). The procedural complications were also significantly lower in DS group (0.6% versus 7.6%, P < 0.001). DS group had significantly lower procedure time (33 ± 19 min versus 41 ± 17 min, P < 0.001), fluoroscopy time (6.2 ± 3.4 min versus 7.8 ± 32 min, P < 0.001), required lesser contrast volume (112 ± 16 mL versus 123 ± 18 mL, P < 0.001) and had lower procedural cost (310 ± 45$ versus 402 ± 56$, P < 0.001). ST-segment resolution > 50% after percutaneous coronary intervention (PCI) were significantly higher in the DS group (85.7% versus 71.1%, P < 0.001). At 30 days, the major adverse cardiac event (MACE) rate was significantly lower in the DS group (2.4% versus 9.3%, P = 0.02), mainly driven by lower rates of target lesion revascularization (TLR) (0.9% versus 4.2%, P = 0.01).

Conclusion

This cost-effective technique appears to be simple, feasible and safe and is associated with superior clinical outcomes. It helps in maximizing DS and could offer an alternative to PD and aspiration thrombectomy in total occlusion. However, larger studies with longer follow up are required before a wider application of this technique.

CVIT expert consensus document on primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI) in 2018

While primary percutaneous coronary intervention (PCI) has significantly contributed to improve the mortality in patients with ST segment elevation myocardial infarction even in cardiogenic shock, primary PCI is a standard of care in most of Japanese institutions. Whereas there are high numbers of available facilities providing primary PCI in Japan, there are no clear guidelines focusing on procedural aspect of the standardized care. Whilst updated guidelines for the management of acute myocardial infarction were recently published by European Society of Cardiology, the following major changes are indicated; (1) radial access and drug-eluting stent over bare metal stent were recommended as Class I indication, and (2) complete revascularization before hospital discharge (either immediate or staged) is now considered as Class IIa recommendation. Although the primary PCI is consistently recommended in recent and previous guidelines, the device lag from Europe, the frequent usage of coronary imaging modalities in Japan, and the difference in available medical therapy or mechanical support may prevent direct application of European guidelines to Japanese population. The Task Force on Primary Percutaneous Coronary Intervention of the Japanese Association of Cardiovascular Intervention and Therapeutics (CVIT) has now proposed the expert consensus document for the management of acute myocardial infarction focusing on procedural aspect of primary PCI.

Optimal course of treatment in acute cardiogenic shock complicating myocardial infarction

INTRODUCTION

About 5% of patients with myocardial infarction suffer from cardiogenic shock as a complication, with a mortality of ≥30%. Primary percutaneous coronary intervention as soon as possible is the most successful therapeutic approach. Prognosis depends not only on the extent of infarction, but also - and even more - on organ hypoperfusion with consequent development of multiple organ dysfunction syndrome. Areas covered: This review covers diagnostic, monitoring and treatment concepts relevant for caring patients with cardiogenic shock complicating myocardial infarction. All major clinical trials have been selected for review of the recent data. Expert commentary: For optimal care, not only primary percutaneous intervention of the occluded coronary artery is necessary, but also best intensive care medicine avoiding the development of multiple organ dysfunction syndrome and finally death. On contrary, intra-aortic balloon pump - though used for decades - is unable to reduce mortality of patients with cardiogenic shock complicating myocardial infarction.

Time course, predictors and clinical implications of stent thrombosis following primary angioplasty

Primary percutaneous coronary intervention (pPCI) has improved survival as compared to thrombolysis. Concerns still remain regarding the risk of stent thrombosis in the setting of STEMI, especially after drugeluting stent (DES) implantation. Therefore, the aim of this study was to report on the timing of stent thrombosis (ST) with both DES and bare metal stents (BMS) and its prognostic significance in patients undergoing pPCI. The Drug-Eluting Stent in Primary Angioplasty (DESERT) cooperation is based on a pooled database including individual data of randomised trials that evaluate the long-term safety and effectiveness of DES as compared to BMS in patients undergoing pPCI for STEMI. Follow-up data were collected for 3–6 years after the procedure. ST was defined as definite or probable, based on the ARC definition. The study population consists of 6,274 STEMI patients undergoing primary angioplasty with BMS or DES. At 1201±440 days, ST occurred in 267 patients (4.25%). Most of the events were acute or subacute (within 30 days) and very late (> 1 years), with different distribution between DES vs BMS. Patients with ST were more often diabetic (21.7% vs 15.1%, p=0.005), more frequently had post-procedural TIMI 0–2 flow (14.0% vs 9.3%, p = 0.01), and were less often treated with dual antiplatelet therapy at one year follow-up. Diabetes (p = 0.036), post-procedural TIMI 0–2 Flow (p = 0.013) and ischaemia time > 6 hours (p = 0.03) were independent predictors of ST. Post-procedural TIMI 0–2 flow (p = 0.001) and ischaemia time > 6 hours (p < 0.001) were independent predictors of early ST, ischaemia time > 6 hours (p=0.05) was independent predictor of late ST, whereas diabetes (p = 0.022) and use of DES (p=0.002) were independent predictors of very late ST. ST was associated with a significantly higher mortality (23.6% vs 6%, p < 0.001). The greatest impact on mortality was observed with subacute (40.4%) and late (20.9%) ST, as compared to acute (12.5%) and very late (9.1%) ST. ST was an independent predictor of mortality (HR [95%CI]=3.73 [2.75–5.07], p < 0.001). In conclusion, ST occurs relatively frequently also beyond the first year for up to six years after pPCI in STEMI, with higher late occurrence rates among patients treated with first generation DES. ST after pPCI is a powerful predictor of mortality, especially subacute ST.

Mechanical strategies to enhance myocardial salvage during primary percutaneous coronary intervention in patients with STEMI

Primary percutaneous coronary intervention (PPCI) has become the mainstay of reperfusion therapy in patients with ST-segment elevation myocardial infarction (STEMI). Despite timely reperfusion by PPCI and restoration of epicardial blood flow in up to 95% of patients, tissue reperfusion remains suboptimal in a sizeable proportion of patients with STEMI. Over the years mechanical and pharmacological strategies to enhance myocardial salvage during PPCI have been developed and used in patients with STEMI. The most common mechanical strategies used in the setting of PPCI include: coronary stenting, direct stenting, mesh-covered stents, self-expanding stents, deferred stenting, thrombectomy, distal protection devices, intra-aortic balloon pumping, left ventricular assist devices and ischaemic conditioning. These strategies are thought to enhance myocardial salvage via improving acute procedural success, attenuation of distal embolisation, microvascular obstruction and reperfusion injury, and providing haemodynamic support. Coronary (direct) stenting is almost the default approach of reperfusion during PPCI procedures. Evidence on the use of mesh-covered stents, self-expanding stents, deferred stenting or left ventricular assist devices is scant and their use in the setting of PPCI remains limited. Mechanical thrombectomy, distal protection devices or routine intra-aortic balloon counterpulsation seem to offer no clinical benefit when used in the setting of PPCI. Although manual aspiration may improve indices of tissue reperfusion, recent research showed no clinical benefit of routine use of this strategy in patients with STEMI undergoing PPCI. Ischaemic conditioning, although promising, remains at an investigational stage and needs further research.

Everolimus eluting stent vs first generation drug-eluting stent in primary angioplasty: A pooled patient-level meta-analysis of randomized trials

BACKGROUND

Several concerns have emerged about the higher risk of very late stent thrombosis (ST) with first generation drug-eluting stent (DES) especially among STEMI patients. Newer generation DES has demonstrated to reduce ST at mid-term follow-up. Therefore, the aim of the present study is to perform an individual patient's data meta-analysis of trials comparing 1st generation DES vs. 2nd generation DES (everolimus-eluting stent, EES) in patients undergoing primary percutaneous coronary intervention (PCI) for STEMI.

METHODS

We performed a formal search of electronic databases (MEDLINE and CENTRAL) and scientific session presentations from January 2010 to June 2016. We included all completed randomized trials comparing 1st vs. EES for patient presenting with STEMI.

RESULTS

Individual patients data were obtained from 3 trials, including a total of 1581 patients (686 or 43.4% randomized to 1st generation DES and 895 or 56.4% randomized to EES). At long-term follow-up (1584±588days), EES did not significantly reduce mortality (7.8.% vs 11.7%, HR [95%CI]=0.77 [0.52, 1.13], p=0.18, p_{heterogeneity}=0.93), cardiac mortality (6.2% vs 7.6%, HR [95%CI]=0.90 [0.56, 1.44], p=0.65, p_{heterogeneity}=0.85), and reinfarction (8.1% versus 11.2%, respectively; HR [95%CI]=0.74 [0.51, 1.07], p=0.11, p_{heterogeneity}=0.52). However, EES significantly reduced the occurrence of ST (3.4% versus 6.1% respectively, HR [95%CI]=0.56 [0.32, 0.97], p=0.04, p_{heterogeneity}=0.42) and target vessel revascularization (TVR) (14.2% versus 20.1%; HR [95%CI]=0.63 [0.42, 0.96], p=0.03, p_{heterogeneity}=0.55). Landmark analysis showed more consistent benefits in ST with EES within 1year, whereas benefits in TVR were mostly observed later than 1year.

CONCLUSIONS

The present pooled patient-level meta-analysis demonstrates that among STEMI patients undergoing primary PCI, EES as compared to 1st generation DES is associated with a significant reduction in ST and TVR at long-term follow-up.

Timing and long-term prognosis of recurrent MI after primary angioplasty : Stent thrombosis vs. non-stent-related reinfarction

BACKGROUND

In patients recovering from an ST-segment elevation myocardial infarction (STEMI), it is not clear whether the negative impact of stent thrombosis (ST) is different from a non-stent-related recurrent myocardial infarction (NSRMI). This study sought to assess the long-term incidence and prognostic impact of recurrent myocardial infarction (MI) after percutaneous coronary intervention (PCI) for STEMI by comparing outcomes of ST versus NSRMI.

PATIENTS AND METHODS

From 2001 to 2007, 1025 patients undergoing PCI for STEMI were prospectively followed up. Patients with ST, with NSRMI, and those free from recurrent MI were compared regarding mortality and major adverse cardiac and cerebrovascular events (MACCE).

RESULTS

Recurrent MI decreased from 37 events per 1000 person/months in the first month to 3.3 events per 1000 person/months after the first year. The cumulative 5‑year incidence of ST and NSRMI was 5.27 % and 13.2 %, respectively. MACCE at 60 months after recurrence were not significantly different for patients with reinfarction but were significantly higher than for patients free from any recurrent MI (both log-rank p < 0.001). However, the cumulative all-cause death rate did not differ between the three groups (27.8 vs. 26.7 vs. 23.0 %). Compared with ST occurring in the first 30 days after PCI for STEMI, early NSRMI was associated with a significantly reduced risk for all-cause death (HR, 0.21; 95 % CI, 0.33-3.30) but this association did not persist for recurrent MIs occurring in the late (HR, 1.05; 95 % CI, 0.33-3.30) or very late follow-up periods.

CONCLUSION

Although ST was associated with a significant increase in adverse events in the early recovery period, in the long term, MACCE and all-cause mortality rates were comparable to those for NSRMI.

Impact of diabetes on the benefits from everolimus-eluting stent as compared to first-generation drug-eluting stent in patients with ST elevation myocardial infarction

BACKGROUND

Drug-eluting stent has been shown to reduce the risk of repeated revascularization. However, as shown for first-generation drug-eluting stent, they may be counterbalanced by a potential higher risk of stent thrombosis, especially among ST-segment elevation myocardial infarction patients. In addition, diabetes has been shown to be an independent predictor of poor survival and repeated target vessel revascularization. No data have been reported so far on the long-term benefits and safety of new-generation drug-eluting stent in ST-segment elevation myocardial infarction according to diabetes. Therefore, the aim of this study was to evaluate whether diabetes may impact on the benefits from everolimus-eluting stent versus first-generation drug-eluting stent in patients undergoing primary angioplasty.

METHODS

We combined data from two randomized trials (PaclitAxel or Sirolimus-Eluting Stent vs Bare-Metal Stent in Primary Angioplasty and randomized comparison of everolimus-eluting stents and sirolimus-eluting stents in patients with ST elevation myocardial infarction) including consecutive ST-segment elevation myocardial infarction patients admitted within 12 h of symptom onset undergoing primary angioplasty and stent implantation at a tertiary centre with 24-h primary percutaneous coronary intervention capability. Primary endpoint of this study was major adverse cardiac events at 3-year follow-up. Secondary endpoints were as follows: (1) death, (2) reinfarction, (3) definite or probable ST and (4) target vessel revascularization at 3-year follow-up. No patient was lost to follow-up.

RESULTS

Our population is represented by 680 ST-segment elevation myocardial infarction patients treated with drug-eluting stent (180 enrolled in the PaclitAxel or Sirolimus-Eluting Stent vs Bare-Metal Stent in Primary Angioplasty trial, treated with first-generation drug-eluting stent, and 500 patients in the randomized comparison of everolimus-eluting stents and sirolimus-eluting stents in patients with ST elevation myocardial infarction, randomized to everolimus-eluting stent or sirolimus-eluting stent). Diabetes was observed in a total of 178 patients (26.1%) and associated with higher major adverse cardiac events, mortality, reinfarction, stent thrombosis and target vessel revascularization. Similar outcome was observed in terms of overall major adverse cardiac events, mortality, recurrent myocardial infarction, target vessel revascularization, with everolimus-eluting stent as compared to first-generation drug-eluting stent in both diabetic and non-diabetic patients, whereas everolimus-eluting stent was associated with a significantly lower rate of stent thrombosis only in diabetic patients (1.6% vs 9.6%, hazard ratio (95% confidence interval) = 0.15 (0.02-0.98), p = 0.04) whereas no difference was observed in non-diabetic patients.

CONCLUSION

This study shows that among ST-segment elevation myocardial infarction patients undergoing primary angioplasty, diabetes is associated with a significantly worse outcome at 3-year follow-up. A similar outcome was observed between everolimus-eluting stent and first-generation drug-eluting stent in non-diabetic patients, whereas among diabetic patients everolimus-eluting stent was associated with a significant reduction in stent thrombosis.

Primary percutaneous coronary intervention by drug-eluting balloon angioplasty: the nonrandomized fourth arm of the DEB-AMI (drug-eluting balloon in ST-segment elevation myocardial infarction) trial

OBJECTIVE

To evaluate a paclitaxel drug-eluting balloon (DEB) only strategy in primary percutaneous coronary intervention (PPCI), aiming at a comparison with bare metal stent (BMS) alone, DEB followed by BMS, and paclitaxel eluting stent (PES), as assessed in the randomized Drug Eluting Balloon in Acute ST-Segment Elevation Myocardial Infarction (DEB-AMI) trial.

BACKGROUND

DEB-only seems an attractive strategy in PPCI, as it obviates the risk of stent thrombosis.

METHODS

This study is a prospective registry with the same inclusion/exclusion criteria used in the DEB-AMI trial, as it constitutes the fourth, nonrandomized, treatment arm of this trial. Patients presenting with ST-elevation myocardial infarction were allocated to DEB-only (DIOR II, Eurocor GmbH, Bonn, Germany) after successful thrombus aspiration and predilatation. Primary endpoint was 6-month angiographic in-balloon/stent late-luminal loss (LLL). Secondary endpoints were in-balloon/stent binary restenosis and major adverse cardiac events (MACE: death, myocardial infarction, target-vessel revascularization).

RESULTS

Forty patients underwent PPCI by DEB-only. Procedural success was achieved in 97.5% with bail-out stenting required in 10.0% of procedures. In DEB-only, LLL was 0.51 ± 0.59 mm as compared to 0.74 ± 0.57 mm in BMS (P = 0.44), 0.64 ± 0.56 mm in DEB+BMS (P = 0.88) and 0.21 ± 0.32 mm in PES (P < 0.01); in-balloon/stent binary restenosis rates were 22.2%, 23.8% (P = 0.67), 28.6% (P = 0.97), and 4.5% (P = 0.07), respectively; and MACE rates were 17.5%, 23.5% (P = 0.20), 20.0% (P = 0.26), and 4.1% (P = 0.90), respectively. No acute or late thrombotic events occurred in the DEB-only group.

CONCLUSIONS

PPCI by DEB-only in selected patients yielded an angiographic outcome comparable to BMS alone and DEB followed by BMS. PES proved angiographic superiority to DEB-only. DEB-only is therefore a potential treatment alternative during PPCI in patients with contra-indications to drug-eluting stents.

Safety and feasibility of a PAclitaxel-eluting balloon angioplasty in Primary Percutaneous coronary intervention in Amsterdam (PAPPA): one-year clinical outcome of a pilot study

AIMS

In primary percutaneous coronary intervention (PPCI), stenting has been shown to reduce the need for repeat target lesion revascularisation (TLR) compared to balloon angioplasty alone, but did not result in a reduction of recurrent myocardial infarction (MI) or cardiac death. Meanwhile, stent-related adverse events such as stent thrombosis continue to be of concern. Our aim was to evaluate the safety and feasibility of drug- coated balloon (DCB) angioplasty without stenting in PPCI.

METHODS AND RESULTS

One hundred patients presenting with ST-elevation MI were prospectively enrolled in this pilot study. They underwent PPCI with DCB angioplasty; additional stenting was allowed only in case of type C to F coronary dissection or residual stenosis >50%. All patients were treated with i.v. bivalirudin. The primary endpoint was the composite of cardiac death, recurrent MI and TLR. A total of 59 patients received treatment with DCB angioplasty alone, whereas additional stenting was required in 41 patients. One-year clinical follow-up was completed in 98 patients. A total of five major adverse cardiac events were reported (5%). Cardiac death was seen in two patients, while three patients underwent TLR.

CONCLUSIONS

This first study of a DCB angioplasty-only strategy in the setting of PPCI showed good one-year clinical results.

Effects of HDL-modifiers on cardiovascular outcomes: a meta-analysis of randomized trials

BACKGROUND AND AIM

High density lipoproteins (HDL) have been addressed as a potential strategy for cardiovascular prevention, with great controversies on pharmacological approaches for HDL-elevation. Our aim was to compare HDL-rising treatment with niacin or CETP-inhibitors with optimal medical therapy in cardiovascular outcome.

METHODS AND RESULTS

Randomized trials were searched. Primary endpoint was cardiovascular death, secondary were: non fatal myocardial infarction; coronary revascularization; cerebrovascular accidents and safety endpoints. As many as 18 randomized trials, for a total of 69,515 patients, were included. HDL-modifiers did not reduce cardiovascular mortality (2.3%vs3.4%; OR [95%CI] = 0.96 [0.87-1.05], p = 0.37, phet = 0.58), with no benefit from niacin/CETP inhibitors according to patients' risk profile (beta [95%CI] = -0.14 [-0.29 to 0.02], p = 0.09) or the amount of HDL increase (beta [95%CI] = 0.014 [-0.008 to 0.04], p = 0.21). Niacin but not CETP-I reduced myocardial infarction and coronary revascularization, but higher rate of SAE occurred with HDL-modifiers (OR [95%CI] = 1.24 [1.18-1.31], p < 0.00001, phet = 0.02), in particular new onset of diabetes with niacin and worsening of hypertension with CETP-inhibitors.

CONCLUSIONS

Niacin and CETP inhibitors do not influence cardiovascular mortality. Significant benefits in MI and coronary revascularization were observed with niacin, despite the higher occurrence of diabetes.

Benefits from new ADP antagonists as compared with clopidogrel in patients with stable angina or acute coronary syndrome undergoing invasive management: a meta-analysis of randomized trials

AIMS

New P2Y12 receptor inhibitors have provided new and more potent antiplatelet strategies, although raising several concerns on possible increase of bleedings. The aim of current meta-analysis was to evaluate the efficacy and safety of new adenosine diphosphate (ADP) receptor antagonists as compared with clopidogrel in elective or ACS patients managed invasively.

METHODS AND RESULTS

Literature archives (Pubmed, EMBASE, Cochrane) and main scientific sessions abstracts were scanned for randomized trials comparing new ADP antagonists with clopidogrel in patients with acute coronary syndromes or stable angina. Primary endpoint was mortality. Secondary endpoints were: (1) nonfatal myocardial infarction (MI), (2) recurrent ischemia symptoms or ischemia-driven revascularization (RI/IDR), (3) stent thrombosis (ST), and (4) safety endpoints, defined as for TIMI major bleeding criteria. A total of 8 randomized clinical trials were finally included, for a total population of 67,851 patients. Mean follow-up was 7.6 months, ranging from 48 hours to 30 months. New ADP antagonists significantly reduced mortality {3.1% vs. 3.6%, odds ratio [OR] [95% confidence interval (CI)], 0.86 [0.79-0.94], P = 0.0008, P(het) = 0.18}, with greater impact of oral drugs. Similar benefits were found for MI [6.1% vs. 7%; OR (95% CI) (random-effect model) = 0.88 (0.79-0.98), P = 0.01, P(het) = 0.02], RI [2.7% vs. 3.1%; OR (95% CI) = 0.85 (0.77-0.93), P = 0.0005, P(het) = 0.09], or ST [1.1% vs. 1.7%; OR (95% CI) = 0.60 (0.51-0.71), P < 0.00001, P(het) = 0.13]. By meta-regression analysis, no relationship was observed between benefits in mortality, new MI, RI, and ST with new ADP antagonists and patients' risk profile [beta (95% CI) = -0.01 [-0.30 to 0.27], P = 0.94; beta (95% CI) = -0.05 [-1.49 to 1.43], P = 0.96); beta (95% CI) = 0.19 (-0.18 to 0.57), P = 0.31, and beta (95% CI) = -0.08 (-0.86 to 0.70), P = 0.84, respectively].

CONCLUSIONS

Present meta-analysis shows that the new ADP antagonists prasugrel, ticagrelor, and cangrelor are associated to significant reduction of mortality, reinfarction, RI, and ST respect to clopidogrel alone, without significant increase in bleeding complications.

[Procedural aspects in primary PCI: arterial access, stent selection, thrombectomy and treatment of non-culprit lesions]

Acute myocardial infarction was one of the most common causes of death in Germany in 2011. According to the guidelines of the European Society for Cardiology, systemic fibrinolysis and primary percutaneous coronary intervention (PCI) are the methods of choice for acute treatment. Primary PCI should be given priority due to its superiority. The transradial access should be preferred due to the lower bleeding complication rate. In the selection of stents the new generation of drug-eluting stents (DES) are superior to the first generation of bare metal stents (BMS). It has now been demonstrated that the incident rates of DES (e.g. mortality, target vessel revascularization, early and late stent thrombosis and myocardial infarction) are significantly lower. For bioresorbable scaffolds (BRS) long-term results for the use in treatment of ST-elevation myocardial infarction (STEMI) are not yet available but initial results are very promising. However, the selection of a stent needs to be done on an individual basis in order to do justice to all aspects. Data with respect to thrombectomy in acute treatment are heterogeneous. Currently, a thorough consideration of all aspects is necessary because thrombus aspiration can also be associated with an increased rate of incidents. In a state of hemodynamic stability only so-called culprit lesions should currently be treated with a stent. Elective interventions on further stenoses should be carried out after consideration of individual factors and if necessary evaluation of the hemodynamic relevance.

Long-term outcomes of drug-eluting versus bare-metal stent for ST-elevation myocardial infarction

BACKGROUND

Long-term outcomes of drug-eluting stents (DES) versus bare-metal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI) remain uncertain.

OBJECTIVE

To investigate long-term outcomes of drug-eluting stents (DES) versus bare-metal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI).

METHODS

We performed search of MEDLINE, EMBASE, the Cochrane library, and ISI Web of Science (until February 2013) for randomized trials comparing more than 12-month efficacy or safety of DES with BMS in patients with STEMI. Pooled estimate was presented with risk ratio (RR) and its 95% confidence interval (CI) using random-effects model.

RESULTS

Ten trials with 7,592 participants with STEMI were included. The overall results showed that there was no significant difference in the incidence of all-cause death and definite/probable stent thrombosis between DES and BMS at long-term follow-up. Patients receiving DES implantation appeared to have a lower 1-year incidence of recurrent myocardial infarction than those receiving BMS (RR = 0.75, 95% CI 0.56 to 1.00, p= 0.05). Moreover, the risk of target vessel revascularization (TVR) after receiving DES was consistently lowered during long-term observation (all p < 0.01). In subgroup analysis, the use of everolimus-eluting stents (EES) was associated with reduced risk of stent thrombosis in STEMI patients (RR = 0.37, p=0.02).

CONCLUSIONS

DES did not increase the risk of stent thrombosis in patients with STEMI compared with BMS. Moreover, the use of DES did lower long-term risk of repeat revascularization and might decrease the occurrence of reinfarction.

Drug-eluting stents in patients with anterior STEMI undergoing primary angioplasty: a substudy of the DESERT cooperation

BACKGROUND

Several concerns have emerged on the higher risk of in-stent thrombosis after drug-eluting stent (DES) implantation, especially in the setting of STEMI patients. Few data have even been reported in high-risk patients, such as those with anterior MI. Therefore this represents the aim of the current study.

METHODS

The literature was scanned by formal searches of electronic databases (MEDLINE and CENTRAL). We examined all completed randomized trials of DES for STEMI. The following key words were used for study selection: randomized trial, myocardial infarction, reperfusion, primary angioplasty, stenting, DES, sirolimus-eluting stent (SES), Cypher, paclitaxel-eluting stent (PES), Taxus. No language restrictions were enforced.

RESULTS

Individual patient's data were obtained from 11 out of 13 trials, including a total of 2,782 patients with anterior MI [1,739 or 62.5% randomized to DES and 1,043 or 37.5% randomized to bare-metal stent (BMS)]. At long-term follow-up, no significant benefit was observed with DES as compared to BMS in terms of mortality [9.8 vs 10.9%, HR (95% CI) = 0.81 (0.61, 1.07), p = 0.13, p heterogeneity = 0.18], reinfarction [8.8 vs 6.4%, respectively; HR (95% CI) = 1.14 (0.80, 1.61), p = 0.47, p heterogeneity = 0.82], and stent thrombosis [5.6 vs 5%, OR (95% CI) = 0.88 (0.59, 1.30), p = 0.51, p heterogeneity = 0.65], whereas DES was associated with a significant reduction in terms of target-vessel revascularization (TVR) [13.7 vs 23.4%; OR (95% CI) = 0.56 (0.46, 0.69), p < 0.0001, p het = 0.81] that was observed at both early (within 1 year) [7 vs 14.7%, HR (95% CI) = 0.56 (0.46, 0.69), p < 0.0001, p het = 0.81] and late (>1 year) follow-up [7.2 vs 9%, HR (95% CI) = 0.67 (0.47, 0.96), p = 0.03, p het = 0.96].

CONCLUSIONS

This study showed that among patients with anterior STEMI undergoing primary angioplasty, SES and PES, as compared to BMS, are associated with a significant reduction in TVR at long-term follow-up. No concerns were found with the use of first-generation DES in terms of mortality.

Meta-analysis of 14 trials comparing bypass grafting vs drug-eluting stents in diabetic patients with multivessel coronary artery disease

BACKGROUND AND AIM

Clinical trials have reported lower mortality and repeated revascularization rate in diabetic patients treated with coronary artery bypass grafting (CABG) as compared to percutaneous revascularization. However, these studies were conducted in the era of bare-metal stents. Therefore, we performed a meta-analysis to compare CABG to PCI with drug-eluting stents (DES) in diabetic patients with multivessel and/or left main disease.

METHODS AND RESULTS

The literature was scanned by formal search of electronic databases (Medline, EMBASE, and Cochrane databases), and major international scientific session abstracts from 2000 to 2013. Primary endpoint was mortality. A total of 14 (4 randomized and 10 non-randomized) trials were finally included, with a total of 7072 patients. Up to 5 years follow-up, CABG was associated with a reduction in mortality (7.3% vs 10.4%, OR[95%CI] = 0.65[0.55-0.77], p < 0.0001; phet = 0.00001), with similar results in both RCTs (OR[95%CI] = 0.64[0.50-0.82], p = 0.0005) and NRCTs (OR[95%CI] = 0.75[0.6-0.94)], p = 0.01) (p int = 0.93). A significant relationship was observed between risk profile and benefits in mortality with CABG (p < 0.001). CABG reduced target vessel revascularization (TVR; 5.2% vs 15.7%, OR[95%CI] = 0.30[0.25-0.36], p < 0.00001, p het = 0.02), with a relationship between risk profile and the benefits from CABG as compared to DES (p < 0.0001). CABG was associated with a lower rate of MACCE (14.9% vs 22.9%, OR[95%CI] = 0.59[0.51-0.67], p < 0.00001, p het<0.00001) but higher risk of CVA (3.6% vs 1.4%, OR[95%CI] = 2.34[1.63-3.35], p < 0.00001, p het = 0.71).

CONCLUSIONS

The present meta-analysis demonstrates that among diabetic patients with multivessel disease and/or left main disease, CABG provides benefits in mortality and TVR, especially in high-risk patients but it is counterbalanced by a higher risk of stroke. Future trials are certainly needed in the era of new DES and improved antiplatelet therapies.

Therapy in ST-elevation myocardial infarction: reperfusion strategies, pharmacology and stent selection

OPINION STATEMENT

The estimated annual incidence of new and recurrent myocardial infarction (MI) in the U.S. is 715,000 events. Primary percutaneous coronary intervention (PCI) is the reperfusion strategy of choice in most patients with acute ST-elevation myocardial infarction (STEMI). Recent advances in percutaneous techniques and devices, including manual aspiration catheters and newer generation drug eluting stents and pharmacologic therapies, such as novel antiplatelets and anticoagulants have led to significant improvements in the acute and long-term outcomes for these patients. Implementation of community-wide systems directed to shorten treatment times tied to closely monitored quality improvement processes have led to further advances in STEMI care. Recent data suggests that transradial access for primary PCI is associated with improved outcomes. This contemporary review discusses the strategies for reperfusion, pharmacological therapy and stent selection process involved in STEMI.

The use of drug-eluting stents in acute myocardial infarction - is the battle coming to an end? From despair to acceptance

The large-scale use of drug-eluting stents (DES) in elective percutaneous coronary interventions resulted in a significant reduction of restenosis and the need for repeat revascularization, compared to bare-metal stents (BMS) and balloon angioplasty. The position of DES used during primary percutaneous coronary intervention was not so well established. Based on the trials including the general population of patients, an increased risk of stent thrombosis was indicated, particularly late after implantation, which may be associated with increased mortality. A number of randomized clinical trials have compared first generation DES with BMS in acute ST-segment elevation myocardial infarction (STEMI). In most of them increased mortality after DES implantation was not confirmed, with demonstrated reduction of repeat revascularizations. However, long-term follow-up of these studies and the results from non-randomized “real world” registries are equivocal. A new generation of DES has been present on the market for several years. They have modern designs, are covered with more neutral polymers and release new drugs. The new generation DES have a better safety and efficacy profile, including a population of patients with acute STEMI, than the first generation stents. This paper is a review of randomized controlled trials, meta-analyses and registries, comparing DES with BMS in patients with acute STEMI. Attention was drawn to the current position and the role of new generation DES, which may prove to be a safe and effective choice in this population of patients.

Recurrent myocardial infarction after primary percutaneous coronary intervention for ST-segment elevation myocardial infarction

The determinants and prognostic value of recurrent myocardial infarction (MI) in a contemporary cohort of ST-segment elevation MI patients treated with primary percutaneous coronary intervention (PPCI) and stenting are currently unknown. We investigated the predictors and prognostic impact of recurrent MI on subsequent clinical outcome in 1,700 ST-segment elevation MI patients treated with PPCI and stenting between January 1, 2003, and July 31, 2008. Two hundred forty patients had a recurrent MI during a median follow-up of 4 years and 7 months (Kaplan Meier estimate 21.2%). By multivariable analysis, recurrent MI was associated with a higher risk of subsequent cardiac mortality (hazard ratio [HR] 6.86, 95% confidence interval [CI] 4.24 to 8.72), noncardiac mortality (HR 2.02, 95% CI 1.10 to 3.69), stroke (HR 3.68, 95% CI 2.02 to 6.72), and Global Use of Strategies to Open Occluded Coronary Arteries criteria severe or moderate bleeding (HR 3.17, 95% CI 1.79 to 5.60). Early recurrent MI (within 1 day of the initial PPCI) was associated with higher unadjusted cardiac mortality rates (64.4%) compared with recurrent MIs occurring ≥1 day after PPCI. However, after multivariable adjustment, late recurrent MI (occurring >1 year after PPCI) was associated with the highest risk of subsequent cardiac mortality (HR 7.98, 95% CI 5.05 to 12.6). The risk of cardiac death was irrespective of the presence of persistent ST-segment elevation during the recurrent MI. In conclusion, recurrent MI after PPCI remains a relatively common complication in contemporary practice and confers a significantly increased risk of death, stroke, and bleeding.