REDUCE-IT: total ischemic events reduced across the full range of baseline LDL cholesterol and other key subgroups

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
D Bhatt ◽  
M Miller ◽  
P.G Steg ◽  
E.A Brinton ◽  
T.A Jacobson ◽  
...  

Abstract Background REDUCE-IT (Reduction of Cardiovascular Events with Icosapent Ethyl-Intervention Trial), a study of 8,179 randomized statin-treated patients with elevated triglycerides (TG) and increased cardiovascular (CV) risk followed for a median of 4.9 years, demonstrated robust results. Icosapent ethyl (IPE), a pure and stable prescription form of eicosapentaenoic acid, 4g/day reduced both time-to-first and total primary endpoint ischemic events (CV death, nonfatal myocardial infarction [MI], nonfatal stroke, coronary revascularization, or hospitalization for unstable angina) by 25% (HR 0.75; 95% CI 0.68–0.83; p<0.0001) and 30% (rate ratio 0.70; 95% CI 0.62–0.78; p<0.0001), respectively. Similar substantial reductions in first and total key secondary endpoint ischemic events (composite of CV death, nonfatal MI, or nonfatal stroke) were also observed. Demographic and baseline disease characteristics were generally balanced across treatment groups. Time-to-first event analyses showed robust and generally consistent benefit across subgroups. Previous total event analyses by baseline TG demonstrated large, consistent, statistically significant reductions across tertiles, suggesting the CV benefit of IPE is tied primarily to non-TG factors. Purpose Further explore the extent to which IPE reduced total primary and key secondary events across prespecified baseline demographic, disease, treatment, and lipid/lipoprotein/inflammatory biomarker subgroups. Methods Total events across subgroups were assessed with the prespecified negative binomial regression method. Main outcomes were total (first and subsequent) primary and key secondary composite endpoint events. Results Median baseline LDL-C levels in ascending tertiles were 58, 76, and 96 mg/dL; there were large, significant relative reductions in total primary endpoint events with IPE across tertiles (35%, 28%, and 27%, respectively; interaction p=0.62), with parallel substantial absolute risk reductions. Similar, significant relative reductions of 33%, 28%, and 24% in total key secondary endpoint events were observed, along with substantial absolute risk reductions. Total events analyses of prespecified subgroups also demonstrated robust and generally consistent findings for the primary and key secondary composite endpoints. Conclusion REDUCE-IT demonstrated substantial reductions in first and total primary and key secondary endpoint ischemic events, with robust and generally consistent results across baseline TG and LDL-C levels, as well as other prespecified baseline biomarker, demographic, disease, and treatment subgroups. These analyses provide useful insights for clinicians considering the range of patients who may benefit from IPE therapy and suggest that mechanisms beyond the lipid/lipoprotein/inflammatory pathways tested, including mechanisms beyond the LDL receptor pathways, may contribute to the observed substantial reductions in total ischemic burden with IPE therapy. Funding Acknowledgement Type of funding source: Other. Main funding source(s): The study was funded by Amarin Pharma, Inc.


2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
D Bhatt ◽  
M Miller ◽  
P.G Steg ◽  
E.A Brinton ◽  
T.A Jacobson ◽  
...  

Abstract Background REDUCE-IT (Reduction of Cardiovascular Events with Icosapent Ethyl-Intervention Trial) randomized 8,179 statin-treated patients with elevated triglycerides and increased cardiovascular (CV) risk to either icosapent ethyl (IPE), a pure, stable prescription form of eicosapentaenoic acid, 4g/day or placebo. IPE significantly reduced time to first occurrence of the primary composite endpoint of major adverse CV events (CV death, nonfatal myocardial infarction [MI], nonfatal stroke, coronary revascularization, or hospitalization for unstable angina) (HR 0.75, CI 0.68–0.83) and key secondary endpoint events (composite of CV death, nonfatal MI, or nonfatal stroke) (HR 0.74, CI 0.65–0.83) versus placebo (all p<0.0001). A modest reduction in placebo-corrected LDL-C was observed (−6.6%; p<0.0001). The mechanisms for the CV benefit of icosapent ethyl are not fully understood. Purpose Explore the impact of statin type and lipophilic/lipophobic category on outcomes, and on LDL-C, to further consider the possible relevance of LDL-C pathways to the observed CV benefit of icosapent ethyl. Methods Primary and key secondary endpoint analyses and LDL-C changes from baseline were explored by individual statin type (atorvastatin, simvastatin, rosuvastatin, or pravastatin) at baseline, and then by categorizing these statins into lipophilic (i.e., hydrophobic: atorvastatin, simvastatin) and lipophobic (i.e., hydrophilic: rosuvastatin, pravastatin) statin groups; 96.1% of patients fell within these individual statin groups. Results CV outcomes were similar across statin types (interaction p=0.61) and lipophilic/lipophobic categories (interaction p=0.51) (Figure). Statin type and category had a similar lack of meaningful impact on the modest placebo-corrected median LDL-C changes from baseline to one year, which ranged from −5.8 to −8.4% (all p≤0.0003). Conclusion No meaningful treatment differences in the primary or key secondary endpoints across statin type or lipophilic/lipophobic category were observed. A similar lack of treatment difference was observed in LDL-C changes from baseline to one year. Therefore, the LDL-C changes and CV risk reduction in REDUCE-IT appear independent of the type of concomitant statin therapy. These data provide clinicians with additional insight regarding concomitant statin therapy considerations when prescribing icosapent ethyl and suggest there are important mechanisms of action for the substantial CV risk reduction observed with icosapent ethyl that are distinct from the LDL receptor pathway. Funding Acknowledgement Type of funding source: Other. Main funding source(s): The study was funded by Amarin Pharma, Inc.



Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Deepak L Bhatt ◽  
Robert Giugliano ◽  
Philippe G Steg ◽  
Michael Miller ◽  
Eliot A Brinton ◽  
...  

Introduction: REDUCE-IT was an event-driven trial that randomized 8,179 statin-treated patients with controlled LDL-C and moderately elevated triglycerides to icosapent ethyl (IPE) 4g daily or placebo, with a median of 4.9 years of follow-up. There was a significant reduction in the prespecified adjudicated rates of the primary endpoint (cardiovascular [CV] death, non-fatal myocardial infarction [MI], non-fatal stroke, coronary revascularization, and unstable angina requiring hospitalization) and of the key secondary endpoint (CV death, MI, stroke), as well as in all the primary endpoint components. We sought to determine the effect of IPE on investigator-reported events. Methods: The Clinical Endpoint Committee (CEC) blindly adjudicated investigator-reported events according to a prespecified charter. Medical records and reports were also reviewed to assess for clinical events not reported by investigators. An endpoint management team compiled and electronically provided event packets to the CEC via an adjudication database. The CEC Chair provided final adjudication if the two primary adjudicators could not reach consensus. Results: IPE significantly reduced the rate of the primary endpoint (hazard ratio 0.74, p=0.0000000002) and the key secondary endpoint (hazard ratio 0.75, p=0.000007) as reported by the site investigators, with consistent benefits in each component of the primary endpoint (Table). There was a high degree of concordance between investigator-reported and adjudicated endpoints. Conclusions: Icosapent ethyl significantly reduced multiple types of ischemic events, both by independent, blinded adjudication as well as by investigator-reported assessment. These results underscore the robustness of the benefits of icosapent ethyl seen in REDUCE-IT.



2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
B Olshansky ◽  
D Bhatt ◽  
M Miller ◽  
P.G Steg ◽  
E.A Brinton ◽  
...  

Abstract Background REDUCE-IT (Reduction of Cardiovascular Events with Icosapent Ethyl-Intervention Trial), an event-driven trial, randomized 8,179 statin-treated patients with elevated triglycerides (TGs) and increased cardiovascular (CV) risk to icosapent ethyl (IPE); pure, stable prescription eicosapentaenoic acid, 4g/day or placebo. 1,612 primary endpoint events (CV death, nonfatal myocardial infarction [MI], nonfatal stroke, coronary revascularization, or hospitalization for unstable angina) projected 90% power to detect 15% relative risk reduction (5% 2-sided alpha). The key secondary composite endpoint was CV death, nonfatal MI, or nonfatal stroke. An independent data and safety monitoring committee (DMC) performed prespecified interim analyses (IAs) at ∼60% (IA1 31 May 2016 data cutoff; 2.9 y median primary endpoint follow-up) and ∼80% (IA2 01 May 2017; 3.7 y) of events; final analysis included 1,606 events (06 Sep 2018; 4.9 y median study follow-up). Purpose Explore REDUCE-IT efficacy and safety across prespecified IAs for insight into progression of robustness and consistency of conclusions. Methods The interim statistical analysis plan guided study continuation decisions by a prespecified decision-making process, including assessment of safety, treatment arm performance, primary composite endpoint formal analyses, and informal robustness analyses, with no futility or efficacy stopping requirements. Prior to DMC IA study continuation decisions, the need for a mature dataset to support the robustness of final efficacy and safety findings was discussed. Sponsor, Steering Committee, and Clinical Endpoint Committee were blinded throughout. Results Primary and key secondary endpoints achieved statistical significance at IA1 and IA2 that persisted at final analyses (p-value below final adjusted 2-sided alpha of 0.0437); hazard ratios also remained consistent and similar robustness was observed across individual endpoint components; clarity of findings across endpoints and subgroups improved with more events. Stopping for overwhelming efficacy was discussed at each IA; prior to IA study continuation recommendations, the DMC considered historical examples of failed CV outcome studies for TG-lowering and mixed omega-3 therapies, reflected on the potential for overestimating final demonstrated benefit using incomplete data, and weighed societal impacts of fuller datasets relative to patient therapy access. Conclusions Consistent, potent efficacy emerged early and persisted across the two prespecified interim and final analyses. The mature dataset demonstrated highly statistically significant reductions in the primary (25%; p=0.00000001) and key secondary (26%; p=0.0000006) endpoints and allowed robust analyses to support overall efficacy and safety conclusions. Allowing the REDUCE-IT dataset to fully mature provided clinicians with robust, consistent, and reliable data upon which to base clinical decisions for IPE in CV risk reduction. Funding Acknowledgement Type of funding source: Other. Main funding source(s): The study was funded by Amarin Pharma, Inc.



2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
K.K Ray ◽  
S Bray ◽  
A.L Catapano ◽  
N Poulter ◽  
G Villa

Abstract Background/Introduction For patients at very-high risk of cardiovascular (CV) events, the 2016 ESC/EAS dyslipidaemia guidelines recommended lipid-lowering therapy (LLT) to achieve an LDL-C level below 70 mg/dL. This was lowered to an LDL-C level below 55 mg/dL in the 2019 guidelines. Purpose To assess: 1) the risk profile of European patients with established atherosclerotic CV disease (ASCVD) receiving LLT; and 2) the treatment gap between the estimated risk and the population benefits if all patients were to achieve LDL-C levels of 70 mg/dL and 55 mg/dL. Methods We used data from Da Vinci, an observational cross-sectional study conducted across 18 European countries. Data were collected at a single visit between June 2017 and November 2018, for consented adults who had received any LLT in the prior 12 months and had an LDL-C measurement in the prior 14 months. LDL-C level was assessed at least 28 days after starting the most recent LLT (stabilised LLT). For each patient with established ASCVD receiving stabilised LLT, we: 1) calculated their absolute LDL-C reduction required to achieve LDL-C levels of 70 mg/dL and 55 mg/dL; 2) predicted their 10-year CV risk using the REACH score based on demographic and medical history; 3) simulated their relative risk reduction (RRR) by randomly sampling from the probability distribution of the rate ratio per 38.7 mg/dL (1 mmol/L) estimated by the Cholesterol Treatment Trialists Collaboration meta-analysis; and 4) calculated their absolute risk reduction (ARR) achieved by meeting LDL-C levels of 70 mg/dL and 55 mg/dL. Results A total of 2039 patients with established ASCVD were included in the analysis. Mean (SD) LDL-C was 83.1 (35.2) mg/dL. 40.4% and 19.3% of patients achieved LDL-C levels of 70 mg/dL and 55 mg/dL, respectively. Mean (SD) 10-year CV risk calculated using the REACH score was 36.3% (15.4%). Mean absolute LDL-C reductions of 19.6 mg/dL and 30.4 mg/dL were needed to reach LDL-C levels of 70 mg/dL and 55 mg/dL, respectively. When adjusted for the LDL-C reduction required to achieve an LDL-C level of 70 mg/dL, mean ARR was 3.0%, leaving a mean (SD) residual 10-year CV risk of 33.3% (15.5%). When adjusted for the LDL-C reduction required to achieve an LDL-C level of 55 mg/dL, mean ARR was 4.6%, leaving a mean (SD) residual 10-year CV risk of 31.7% (15.2%). Conclusion(s) In a contemporary European cohort with ASCVD receiving LLT, the 10-year risk of CV events is high and many patients do not achieve LDL-C levels of 55 mg/dL or even of 70 mg/dL. Moreover, even if all patients were to achieve recommended LDL-C levels, they would still remain at a high residual risk of CV events. These data suggest these patients require even more intensive LLT. Funding Acknowledgement Type of funding source: Private company. Main funding source(s): Amgen



2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
H.Y Chang ◽  
W.R Chiou ◽  
P.L Lin ◽  
C.Y Hsu ◽  
C.T Liao ◽  
...  

Abstract Background Ischemic cardiomyopathy (ICM) has been associated with increased mortality when compared with non-ischemic cardiomyopathy (NICM) from several heart failure (HF) cohorts. Instead, PARADIGM study demonstrated similar event rates of cardiovascular (CV) death, all-cause mortality and HF readmissions between ICM and NICM patients. Although the beneficiary effect of sacubitril/valsartan (SAC/VAL) compared to enalapril on these endpoints was consistent across etiologic categories, PARADIGM study did not analyze the effect of ventricular remodeling of SAC/VAL on patients with different HF etiologies, which may significantly affect treatment outcomes. Purpose We aim to compare alterations of left ventricular ejection fraction (LVEF) following SAC/VAL treatment and its association with clinical outcomes in patients with different HF etiologies. Methods Treatment with angiotensin receptor neprilysin inhibitor for Taiwan heart failure patients (TAROT-HF) study is a multicenter study which enrolled 1552 patients with LVEF <40%, whom had been on SAC/VAL treatment from 9 hospitals between 2017 and 2018. After excluding patients without having follow-up echocardiographic studies, patients were grouped by HF etiologies and by LVEF changes following treatment for 8-month period. LVEF improvement ≥15% was defined as “significant improvement”, 5–15% as “marginal improvement”, and <5% or worse as “lack of improvement”. The primary endpoint was a composite of CV death or a first hospitalization for HF. Mean follow-up period was 726 days. Results A total of 1230 patients were analyzed. Patients with ICM were significantly older, more male, and prone to have associated hypertension and diabetes. On the other hand, patients with NICM had lower LVEF and higher likelihood of atrial fibrillation. LVEF increase was significantly greater in patients with NICM compared to those with ICM (11.2±12.4% vs. 6.9±9.8, p<0.001). The effect of ventricular remodeling of SAC/VAL on patients with NICM showed twin peaks diversity (Significant improvement 37.1%, lack of improvement 42.3%), whereas in patients with ICM the proportions of significant, marginal and lack of improvement groups were 19.4%, 28.2% and 52.4%, respectively. The primary endpoint showed twin peaks diversity also in patients with NICM in line with LVEF changes: adjusted HR for patients with NICM and significant improvement was 0.41 (95% CI 0.29–0.57, p<0.001), for patients with NICM and lack of improvement was 1.54 (95% CI 1.22–1.94, p<0.001). Analyses for CV death, all-cause mortality, and HF readmission demonstrated consistent results. Conclusion Patients with NICM had higher degree of LVEF improvement than those with ICM following SAC/VAL treatment, and significant improvement of LVEF in NICM patients may indicate favorable outcome. NICM patients without response to SAC/VAL treatment should serve as an indicator for poor clinical outcome and warranted meticulous HF management. Funding Acknowledgement Type of funding source: Private hospital(s). Main funding source(s): Cheng Hsin General Hospital



2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
E Bouwens ◽  
A Schuurman ◽  
K.M Akkerhuis ◽  
S.J Baart ◽  
K Caliskan ◽  
...  

Abstract Background Activation of the inflammatory response in heart failure (HF) may initially serve as a compensatory mechanism. However, on the longer term, this physiological phenomenon can become disadvantageous. Temporal patterns of inflammatory proteins other than CRP have not yet been investigated in patients with stable HF. Purpose We aimed to evaluate the association of 17 serially measured cytokines and cytokine receptors with clinical outcome in patients with stable heart failure. Methods In 263 patients, 1984 serial, tri-monthly blood samples were collected during a median follow-up of 2.2 (IQR: 1.4–2.5) years. The primary endpoint (PE) composed of cardiovascular mortality, HF-hospitalization, heart transplantation, and LVAD. We selected baseline blood samples in all patients, as well as the two samples closest to the primary endpoint, and the last sample available in event-free patients. Thus, in 567 samples we measured 17 cytokines and cytokine receptors using the Olink Proteomics Cardiovascular III multiplex assay. Associations between biomarkers and PE were investigated by joint modelling. Results Median age was 68 (IQR: 59–76) years, with 72% men, 74% NYHA class I-II and a median ejection fraction of 30% (23–38%). 70 patients reached a PE. After adjustment for clinical characteristics (age, sex, diabetes, atrial fibrillation, NYHA class at baseline, diuretics and systolic blood pressure), 7 biomarkers were associated with the PE (Figure). Interleukin-1 receptor type 1 (IL1RT1) showed the strongest association: HR 2.65 [95% CI: 1.78–4.21]) per standard deviation change in level (NPX) at any point in time during follow-up, followed by Tumor necrosis factor receptor 1 (TNF-R1): 2.25 [1.66–3.08], and C-X-C motif chemokine 16 (CXCL16): 2.18 [1.59–3.04]. After adjustment for baseline N-terminal pro–B-type natriuretic peptide, high-sensitive troponin T and C-reactive protein however, only IL1RT1 and TNF-R1 remained significantly associated with the PE. Conclusion Repeatedly measured levels of several cytokines and cytokine receptors are independently associated with clinical outcome in stable HF patients. These results suggest that repeated measurements of these biomarkers, in addition to established cardiac biomarkers, may contribute to personalized risk assessment and herewith better identify high-risk patients. Figure 1. Associations between levels of cytokines and cytokine receptors and the primary endpoint. Funding Acknowledgement Type of funding source: Other. Main funding source(s): This work was supported by the Jaap Schouten Foundation and the Noordwest Academie.





2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
T Kinoshita ◽  
K Hashimoto ◽  
K Yoshioka ◽  
Y Miwa ◽  
K Yodogawa ◽  
...  

Abstract Background Recent guidelines have stated that reduced left ventricular ejection fraction (LVEF) is the gold standard marker for identifying patients at risk for cardiac mortality. Although reduced LVEF identifies patients at an increased risk of cardiac arrest, sudden cardiac deaths (SCDs) occur considerably more often in patients with relatively preserved LVEF. Current guidelines on SCD risk stratification do not adequately cover this general population pool. Several noninvasive electrocardiographic (ECG) risk stratifiers that reflect depolarization abnormality, repolarization abnormality, and autonomic imbalance have been evaluated so far. With current therapeutic advances using new medicines or devices, an LVEF is often preserved in patients with structural heart disease (SHD). However, the usefulness of noninvasive ECG markers for risk stratification in such a patient population has not yet been elucidated. Purpose This study aimed to assess clinical indices and ECG markers based on 24-hour Holter ECG recordings for predicting cardiac mortality in patients with SHD who have left ventricular dysfunction (LVD) but relatively preserved LVEF. Methods In total, 1,829 patients were enrolled into the Japanese Multicenter Observational Prospective Study (JANIES study). In this study, we analyzed data of 719 patients (569 men, age 64±13 years) with SHD including mainly ischemic heart disease (65.8%). As ECG markers based on 24-hour Holter recordings, nonsustained ventricular tachycardia (NSVT), ventricular late potentials, and heart rate turbulence (HRT) were assessed. The primary endpoint was all-cause mortality, and the secondary endpoint was fatal arrhythmic events. Results During a mean follow-up of 21±11 months, all-cause mortality was eventually observed in 39 patients (5.4%). Among those patients, 32 patients (82%) suffered from cardiac causes such as heart failure and arrhythmia. Multivariate Cox regression analysis showed that after adjustment for age and LVEF, documented NSVT (hazard ratio=2.82, 95% confidence interval [CI]: 1.38–5.76, P=0.005) and abnormal HRT (hazard ratio=2.31, 95% CI: 1.15–4.65, P=0.02) were significantly associated with the primary endpoint. These two ECG markers also had significant predictive values with the secondary endpoint. The combined assessment documented NSVT and abnormal HRT improved predictive accuracy. Conclusion This study demonstrated that combined assessment of documented NSVT and abnormal HRT based on 24-hour Holter ECG recordings are recommended for predicting future serious events in SHD patients who have relatively preserved LVEF. Acknowledgement/Funding Grants-in-Aid (21590909, 24591074, and 15K09103 to T.I.) for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technol



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