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      Influence of Cardiovascular Risk Factors, Comorbidities, Medication Use and Procedural Variables on Remote Ischemic Conditioning Efficacy in Patients with ST-Segment Elevation Myocardial Infarction

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          Abstract

          Remote ischemic conditioning (RIC) confers cardioprotection in patients with ST-segment elevation myocardial infarction (STEMI). Despite intense research, the translation of RIC into clinical practice remains a challenge. This may, at least partly, be due to confounding factors that may modify the efficacy of RIC. The present review focuses on cardiovascular risk factors, comorbidities, medication use and procedural variables which may modify the efficacy of RIC in patients with STEMI. Findings of such efficacy modifiers are based on subgroup and post-hoc analyses and thus hold risk of type I and II errors. Although findings from studies evaluating influencing factors are often ambiguous, some but not all studies suggest that smoking, non-statin use, infarct location, area-at-risk of infarction, pre-procedural Thrombolysis in Myocardial Infarction (TIMI) flow, ischemia duration and coronary collateral blood flow to the infarct-related artery may influence on the cardioprotective efficacy of RIC. Results from the on-going CONDI2/ERIC-PPCI trial will determine any clinical implications of RIC in the treatment of patients with STEMI and predefined subgroup analyses will give further insight into influencing factors on the efficacy of RIC.

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          Most cited references63

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          2017 ESC Guidelines for the management of acute myocardial infarction in patients presenting with ST-segment elevation

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            Recent trends in the incidence, treatment, and outcomes of patients with STEMI and NSTEMI.

            despite the widespread use of electrocardiographic changes to characterize patients presenting with acute myocardial infarction, little is known about recent trends in the incidence rates, treatment, and outcomes of patients admitted for acute myocardial infarction further classified according to the presence of ST-segment elevation. The objectives of this population-based study were to examine recent trends in the incidence and death rates associated with the 2 major types of acute myocardial infarction in residents of a large central Massachusetts metropolitan area. We reviewed the medical records of 5383 residents of the Worcester (MA) metropolitan area hospitalized for either ST-segment elevation acute myocardial infarction (STEMI) or non-ST-segment acute myocardial infarction (NSTEMI) between 1997 and 2005 at 11 greater Worcester medical centers. the incidence rates (per 100,000) of STEMI decreased appreciably (121 to 77), whereas the incidence rates of NSTEMI increased slightly (126 to 132) between 1997 and 2005. Although in-hospital and 30-day case-fatality rates remained stable in both groups, 1-year postdischarge death rates decreased between 1997 and 2005 for patients with STEMI and NSTEMI. the results of this study demonstrate recent decreases in the magnitude of STEMI, slight increases in the incidence rates of NSTEMI, and decreases in long-term mortality in patients with STEMI and NSTEMI. Our findings suggest that acute myocardial infarction prevention and treatment efforts have resulted in favorable decreases in the frequency of STEMI and death rates from the major types of acute myocardial infarction. 2011 Elsevier Inc. All rights reserved.
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              System delay and mortality among patients with STEMI treated with primary percutaneous coronary intervention.

              Timely reperfusion therapy is recommended for patients with ST-segment elevation myocardial infarction (STEMI), and door-to-balloon delay has been proposed as a performance measure in triaging patients for primary percutaneous coronary intervention (PCI). However, focusing on the time from first contact with the health care system to the initiation of reperfusion therapy (system delay) may be more relevant, because it constitutes the total time to reperfusion modifiable by the health care system. No previous studies have focused on the association between system delay and outcome in patients with STEMI treated with primary PCI. To evaluate the associations between system, treatment, patient, and door-to-balloon delays and mortality in patients with STEMI. Historical follow-up study based on population-based Danish medical registries of patients with STEMI transported by the emergency medical service and treated with primary PCI from January 1, 2002, to December 31, 2008, at 3 high-volume PCI centers in Western Denmark. Patients (N = 6209) underwent primary PCI within 12 hours of symptom onset. The median follow-up time was 3.4 (interquartile range, 1.8-5.2) years. Crude and adjusted hazard ratios of mortality obtained by Cox proportional regression analysis. A system delay of 0 through 60 minutes (n = 347) corresponded to a long-term mortality rate of 15.4% (n = 43); a delay of 61 through 120 minutes (n = 2643) to a rate of 23.3% (n = 380); a delay of 121 through 180 minutes (n = 2092) to a rate of 28.1% (n = 378); and a delay of 181 through 360 minutes (n = 1127) to a rate of 30.8% (n = 275) (P < .001). In multivariable analysis adjusted for other predictors of mortality, system delay was independently associated with mortality (adjusted hazard ratio, 1.10 [95% confidence interval, 1.04-1.16] per 1-hour delay), as was its components, prehospital system delay and door-to-balloon delay. System delay was associated with mortality in patients with STEMI treated with primary PCI.
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                Author and article information

                Journal
                Int J Mol Sci
                Int J Mol Sci
                ijms
                International Journal of Molecular Sciences
                MDPI
                1422-0067
                02 July 2019
                July 2019
                : 20
                : 13
                : 3246
                Affiliations
                [1 ]Department of Cardiology, Aarhus University Hospital, 8200 Aarhus N, Denmark
                [2 ]Department of Clinical Medicine, Aarhus University, 8200 Aarhus N, Denmark
                [3 ]Department of Medicine, Randers Regional Hospital, 8930 Randers, Denmark
                [4 ]Department of Cardiology, Rigshospitalet, 2100 Copenhagen Ø, Denmark
                Author notes
                [* ]Correspondence: kpryds@ 123456clin.au.dk ; Tel.: +45-75482029
                Author information
                https://orcid.org/0000-0003-0182-8718
                Article
                ijms-20-03246
                10.3390/ijms20133246
                6650921
                31269650
                872ca734-1b50-44f1-bda5-ffbc7a999235
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 29 May 2019
                : 28 June 2019
                Categories
                Review

                Molecular biology
                acute myocardial infarction,st-segment elevation myocardial infarction,post-infarction heart failure,remote ischemic conditioning,ischemic preconditioning

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