Temporal trends in diagnosis, treatment, and outcome for non-ST-segment elevation acute coronary syndrome in three regions of China, 2008-2015.
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ABSTRACT:
SUBMITTER: Liu R
PROVIDER: S-EPMC8382473 | biostudies-literature | 2021 Aug
REPOSITORIES: biostudies-literature
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Temporal trends in diagnosis, treatment, and outcome for non-ST-segment elevation acute coronary syndrome in three regions of China, 2008-2015.
Liu Rong R Sun Yu-Qing YQ Hou Xiao-Xia XX Zheng Yang Y Huffman Mark D MD Anderson Craig S CS He Liu L Xia Shi-Jun SJ Jiang Chao C Du Xin X Dong Jian-Zeng JZ Ma Chang-Sheng CS
Chinese medical journal 20210811 16
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Project description:BackgroundPrimary percutaneous coronary intervention (pPCI) has been the national reperfusion strategy for patients with ST-segment elevation myocardial infarction (STEMI) in Denmark since 2003. We recently reported a gradual reduction in 1-year mortality in patients with pPCI-treated STEMI. To elucidate potential causes of this reduction, we examined trends in major adverse cardiovascular events (MACE).ObjectivesThe purpose of this study was to examine trends in 1-year risk of MACE following pPCI-treated STEMI from 2003 to 2017.MethodsThe Western Denmark Heart Registry was used to identify first-time PCI-treated patients undergoing pPCI for STEMI from 2003 to 2017. Patients were categorized into 4 time periods (2003-2006, 2007-2010, 2011-2014, and 2015-2017) and the main outcome was 1-year MACE, defined as recurrent myocardial infarction, ischemic stroke, or cardiovascular death. Temporal changes were compared to those of an age- and sex-matched general population.ResultsWe included 18,540 first-time pPCI-treated STEMI patients between 2003 and 2017. The 1-year risk of MACE decreased from 13.0% in 2003-2006 to 8.7% in 2015-2017 (adjusted HR: 0.67; 95% CI: 0.58-0.76). Similar relative reductions were observed for the individual components of MACE. Cardiovascular death was the most common outcome and the largest contributor to the absolute reduction in MACE. Compared to the matched general population, STEMI patients had 11% higher 1-year risk of MACE in 2003 to 2006, a risk difference that decreased to 7% in 2015 to 2017.ConclusionsIn Western Denmark, with a fully implemented pPCI strategy, the 1-year risk of MACE and its individual components declined gradually by one-third in pPCI-treated STEMI patients from 2003 to 2017.
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Project description:IntroductionCalifornia has led successful regionalized efforts for several time-critical medical conditions, including ST-segment elevation myocardial infarction (STEMI), but no specific mandated protocols exist to define regionalization of care. We aimed to study the trends in regionalization of care for STEMI patients in the state of California and to examine the differences in patient demographic, hospital, and county trends.MethodsUsing survey responses collected from all California emergency medical services (EMS) agencies, we developed four categories - no, partial, substantial, and complete regionalization - to capture prehospital and inter-hospital components of regionalization in each EMS agency's jurisdiction between 2005-2014. We linked the survey responses to 2006 California non-public hospital discharge data to study the patient distribution at baseline.ResultsSTEMI regionalization-of-care networks steadily developed across California. Only 14% of counties were regionalized in 2006, accounting for 42% of California's STEMI patient population, but over half of these counties, representing 86% of California's STEMI patient population, reached complete regionalization in 2014. We did not find any dramatic differences in underlying patient characteristics based on regionalization status; however, differences in hospital characteristics were relatively substantial.ConclusionPotential barriers to achieving regionalization included competition, hospital ownership, population density, and financial challenges. Minimal differences in patient characteristics can establish that patient differences unlikely played any role in influencing earlier or later regionalization and can provide a framework for future analyses evaluating the impact of regionalization on patient outcomes.
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Project description:Primary PCI of infarct-related arteries is the preferred reperfusion strategy in patients presenting with ST-segment elevation myocardial infarction (STEMI). Up to 40 % of such patients demonstrate evidence of multivessel, non-infarct-related artery coronary disease. Previous non-randomised observational studies and their associated meta-analyses have suggested that in such cases only the culprit infarct-related artery (IRA) lesion should be treated. However, recent randomised controlled trials have demonstrated improved clinical outcomes with lower major adverse cardiovascular events (MACE) rates when complete revascularisation is undertaken either at index primary percutaneous coronary intervention (PPCI) or during index admission. These trials suggest that current guidelines pertaining to treatment of non-infarct-related artery (N-IRA) lesions in STEMI patients with multivessel disease may need to be reconsidered depending on future trials. However, issues remain around timing of N-IRA intervention, the use of fractional flow reserve (FFR) or intravascular imaging to guide intervention in N-IRA lesions and the need to demonstrate reductions in hard clinical endpoints (death and MI) after complete revascularisation; these issues will need to be addressed through future trials. Clinicians must judge on the currently available data, whether it is still safer to leave important stenosis in N-IRA untreated.
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Project description:Electrocardiography and high-sensitivity cardiac troponin testing are routinely applied as the initial step for clinical evaluation of patients with suspected non-ST-segment elevation myocardial infarction. Once diagnosed, patients with non-ST-segment elevation myocardial infarction are commenced on antithrombotic and secondary preventative therapies before undergoing invasive coronary angiography to determine the strategy of coronary revascularisation. However, this clinical pathway is imperfect and can lead to challenges in the diagnosis, management, and clinical outcomes of these patients. Computed tomography coronary angiography (CTCA) has increasingly been utilised in the setting of patients with suspected non-ST-segment elevation myocardial infarction, where it has an important role in avoiding unnecessary invasive coronary angiography and reducing downstream non-invasive functional testing for myocardial ischaemia. CTCA is an excellent gatekeeper for the cardiac catheterisation laboratory. In addition, CTCA provides complementary information for patients with myocardial infarction in the absence of obstructive coronary artery disease and highlights alternative or incidental diagnoses for those with cardiac troponin elevation. However, the routine application of CTCA has yet to demonstrate an impact on subsequent major adverse cardiovascular events. There are several ongoing studies evaluating CTCA and its associated technologies that will define and potentially expand its application in patients with suspected or diagnosed non-ST-segment elevation myocardial infarction. We here review the current evidence relating to the clinical application of CTCA in patients with non-ST-segment elevation myocardial infarction and highlight the areas where CTCA is likely to have an increasing important role and impact for our patients.
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Project description:As a result of increased life expectancy, octogenarians constitute an increasing proportion of patients admitted to hospital for ST-segment elevation myocardial infarction (STEMI). Primary percutaneous coronary intervention is currently the treatment of choice for octogenarians presenting with STEMI. The recent literature on this topic has yielded controversial results, even though advances in drug-eluting stents and new types of antithrombotic agents are improving the management of STEMI and postoperative care. In this paper, we review the current status of percutaneous coronary intervention in the elderly with STEMI, including the reasons for their high mortality and morbidity, predictors of mortality, and strategies to improve outcomes.
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Project description:Coronary angiography (CA) is the basis of an invasive management strategy in non-ST elevation acute coronary syndromes (NSTEACS). There are limited contemporary data on national temporal trends in utilization of CA in different patient subgroups. We sought to investigate temporal trends, predictors and clinical outcomes associated with the use of CA in the US. Using the Nationwide Inpatient Sample (NIS) from 2004-2014, we identified all inpatient admissions, age ≥18, with a primary diagnosis of NSTEACS. Descriptive statistics and multivariable logistic regression models were used to investigate temporal trends, predictors and clinical outcomes associated with CA. From a total of 4,380,827 patients, 57.5% received CA during the study period and were more likely to be male, younger and less comorbid as defined per Charlson comorbidity index. The proportion of patients receiving CA increased from 48.5% to 68.5%, however, higher proportional increase was observed in males (53.9% to 69.4% Ptrend < 0.001) and those age ≤60 years (59.0% to 77.9% Ptrend < 0.001). Prior history of CABG (OR 0.33 95%CI 0.35-0.36), previous PCI (OR 0.84 95%CI 0.83-0.86) and previous AMI (OR 0.65 95%CI 0.64-0.67) were inversely related with receipt of CA. Receipt of CA was strongly associated with decreased odds of in-hospital mortality (OR 0.38 95%CI 0.36-0.40). In this national analysis, we observed a temporal increase in utilization of CA albeit slower adoption was noted in older, women and more comorbid patients. The risk-treatment paradox wherein patients who are most likely to benefit were less likely to receive CA persists even in contemporary practice.
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Project description:ImportancePercutaneous coronary intervention (PCI) of nonculprit vessels among patients with ST-segment elevation myocardial infarction (STEMI) is associated with improved clinical outcome compared with culprit vessel-only PCI. Fractional flow reserve (FFR) and coronary flow reserve are hyperemic indices used to guide revascularization. Recently, instantaneous wave-free ratio was introduced as a nonhyperemic alternative to FFR. Whether these indices can be used in the acute setting of STEMI continues to be investigated.ObjectiveTo assess the value of hemodynamic indices in nonculprit vessels of patients with STEMI from the index event to 1-month follow-up.Design, setting, and participantsThis substudy of the Reducing Micro Vascular Dysfunction in Revascularized STEMI Patients by Off-target Properties of Ticagrelor (REDUCE-MVI) randomized clinical trial enrolled 98 patients with STEMI who had an angiographic intermediate stenosis in at least 1 nonculprit vessel. Patient enrollment was between May 1, 2015, and September 19, 2017. After successful primary PCI, nonculprit intracoronary hemodynamic measurements were performed and repeated at 1-month follow-up. Cardiac magnetic resonance imaging was performed from 2 to 7 days and 1 month after primary PCI.Main outcomes and measuresThe value of nonculprit instantaneous wave-free ratio, FFR, coronary flow reserve, hyperemic index of microcirculatory resistance, and resting microcirculatory resistance from the index event to 1-month follow-up.ResultsOf 73 patients with STEMI included in the final analysis, 59 (80.8%) were male, with a mean (SD) age of 60.8 (9.9) years. Instantaneous wave-free ratio (SD) did not change significantly (0.93 [0.07] vs 0.94 [0.06]; P = .12) and there was no change in resting distal pressure/aortic pressure (mean [SD], 0.94 [0.06] vs 0.95 [0.06]; P = .25) from the acute moment to 1-month follow-up. The FFR decreased (mean [SD], 0.88 [0.07] vs 0.86 [0.09]; P = .001) whereas coronary flow reserve increased (mean [SD], 2.9 [1.4] vs 4.1 [2.2]; P < .001). Hyperemic index of microcirculatory resistance decreased and resting microcirculatory resistance increased from the acute moment to follow-up. The decrease in distal pressure from rest to hyperemia was smaller at the acute moment vs follow-up (mean [SD], 10.6 [11.2] mm Hg vs 14.1 [14.2] mm Hg; P = .05). This blunted acute hyperemic response correlated with final infarct size (ρ, -0.29; P = .02). The resistive reserve ratio was lower at the acute moment vs follow-up (mean [SD], 3.4 [1.7] vs 5.0 [2.7]; P < .001).Conclusions and relevanceIn the acute setting of STEMI, nonculprit coronary flow reserve was reduced and FFR was augmented, whereas instantaneous wave-free ratio was not altered. These results may be explained by an increased hyperemic microvascular resistance and a blunted adenosine responsiveness at the acute moment that was associated with infarct size.
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