Clinical factors associated with microvascular obstruction in early presenters of ST-segment elevation myocardial infarction

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
A.L Rivero Monteagudo ◽  
B Arroyo Rivera ◽  
C Garcia Talavera ◽  
M Cortes Garcia ◽  
J.A Franco Pelaez ◽  
...  
Keyword(s):  
Microvascular Obstruction ◽  
Cox Regression ◽  
Class Iii ◽  
Cox Regression Analysis ◽  
Killip Class ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
The Mean ◽  
Predictor Factors

Abstract Background Microvascular obstruction (MVO) is a phenomenon that occurs frequently even after primary coronary intervention with recanalization of the infarct-related artery (IRA) and it has been shown to increase the risk of adverse cardiovascular events in ST-segment elevation myocardial infarction (STEMI) patients. The most important clinical predictor of MVO is ischemia duration, but there is a lack of information regarding predictor factors in promptly revascularized patients. Methods From January 2007 to October 2017, 987 patients with STEMI that underwent urgent coronary angiography were retrospectively enlisted. We included 321 patients that were revascularized in ≤3 hours from symptom onset. Clinical and angiographic data were taken from hospital records. A univariate and multivariate Cox regression analysis was made to assess the relationship between MVO (defined as final TIMI <3 in IRA) and potential predictors. Results From the 321 patients included, 76.9% were male and the mean age was 63.6±13.4 years. LVEF at admission was 46.2±12%. The mean time between symptom onset and wire crossing was 2.2±0.6 hours and MVO was found in 43 cases (13.4%). Descriptive data of predictor factors and their association with MVO are shown in Table 1. After the multivariate Cox regression analysis, smoking was a protector factor of MVO (OR 0.39 [0.16–0.96]). Age (OR 1.03 [1.01–1.06]) and Killip class III-IV at admission (OR 5.96 [2.1–16.4]) were directly associated with MVO. No other clinical variables were independently associated with the occurrence of MVO. Conclusions In very early presenters of STEMI, age and Killip class III-IV at admission were clinical predictor factors of MVO. Current smoking could carry a protector mechanism for MVO in this population, that is yet to be confirmed with prospective studies. Funding Acknowledgement Type of funding source: None

P4614Predictor factors of microvascular obstruction in early presenters of ST-segment elevation myocardial infarction

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
A L Rivero Monteagudo ◽  
B Arroyo Rivera ◽  
C Garcia Talavera ◽  
M Cortes Garcia ◽  
J A Franco Pelaez ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Microvascular Obstruction ◽  
Cox Regression ◽  
Class Iii ◽  
Cox Regression Analysis ◽  
Killip Class ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
The Mean

Abstract Background Microvascular obstruction (MVO) is a phenomenon that occurs frequently even after primary coronary intervention with recanalization of the infarct-related artery (IRA) and it has been shown to increase the risk of adverse cardiovascular events in ST-segment elevation myocardial infarction (STEMI) patients. The most important clinical predictor of MVO is ischemia duration, but there is a lack of information regarding predictor factors in promptly revascularized patients. Methods From January 2007 to October 2017, 1022 patients with STEMI that underwent urgent coronary angiography were retrospectively enlisted. We included 760 patients that were revascularized in ≤6 hours from symptom onset. Clinical, echocardiographic and angiographic data were taken from hospital records. A multivariate Cox regression analysis was made to assess the relationship between MVO (defined as final TIMI <3 in IRA) and potential predictors. Results From the 760 patients included, 73.7% were male and the mean age was 64.8±14.2 years. LVEF at admission was 46.1±12% and Killip class at admission was III-IV in 12.8% of the cases. The mean time between symptom onset and wire crossing was 3.3±1.3 hours. MVO was found in 130 cases (17.2%). After the multivariate Cox regression analysis, Killip class III-IV at admission was associated with MVO (OR 2.87 [1.31–6.31]). No other clinical variables were independently associated with the occurrence of MVO. The angiographic and interventional variables with a significant association with MVO were: predilatation (OR 1.87 [1.003–3.49]), postdilatation (OR 0.49 [0.27–0.89]), stent length (OR 1.04 [1.001–1.08]), stent diameter (OR 1.89 [1.11–3.23]), thrombus burden of the culprit lesion (OR 2.69 [1.26–5.71]) and distal embolization (OR 5.52 [2.79–10.89]). Conclusions In early presenters of STEMI, angiographic and interventional variables were more important as predictors of MVO than clinical variables. Killip class III-IV at admission was a clinical predictor factor for MVO in this population. Prospective studies are needed to confirm these results.

scholarly journals MicroRNA-146a Serves as a Biomarker for Adverse Prognosis of ST-Segment Elevation Myocardial Infarction

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Shengjue Xiao ◽  
Tongneng Xue ◽  
Qinyuan Pan ◽  
Yue Hu ◽  
Qi Wu ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Cox Regression ◽  
Control Groups ◽  
Hub Genes ◽  
Cox Regression Analysis ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Low Levels ◽  
And Control

Objective. This study is aimed at exploring the underlying molecular mechanisms of ST-segment elevation myocardial infarction (STEMI) and provides potential clinical prognostic biomarkers for STEMI. Methods. The GSE60993 dataset was downloaded from the GEO database, and the differentially expressed genes (DEGs) between STEMI and control groups were screened. Enrichment analysis of the DEGs was subsequently performed using the DAVID database. A protein–protein interaction network was constructed, and hub genes were identified. The hub genes in patients were then validated by quantitative reverse transcription-PCR. Furthermore, hub gene-miRNA interactions were evaluated using the miRTarBase database. Finally, patient data on classical cardiovascular risk factors were collected, and plasma microRNA-146a (miR-146a) levels were detected. An individualized nomogram was constructed based on multivariate Cox regression analysis. Results. A total of 239 DEGs were identified between the STEMI and control groups. Expression of S100A12 and miR-146a was significantly upregulated in STEMI samples compared with controls. STEMI patients with high levels of miR-146a had a higher risk of major adverse cardiovascular events (MACEs) than those with low levels of miR-146a (log-rank P = 0.034 ). Multivariate Cox regression analysis identified five statistically significant variables, including age, hypertension, diabetes mellitus, white blood cells, and miR-146a. A nomogram was constructed to estimate the likelihood of a MACE at one, two, and three years after STEMI. Conclusion. The incidence of MACEs in STEMI patients expressing high levels of miR-146a was significantly greater than in those expressing low levels. MicroRNA-146a can serve as a biomarker for adverse prognosis of STEMI and might function in its pathogenesis by targeting S100A12, which may exert its role via an inflammatory response. In addition, our study presents a valid and practical model to assess the probability of MACEs within three years of STEMI.

scholarly journals Incidence and Long‐Term Outcomes of Stroke in Patients Presenting With ST‐Segment Elevation–Myocardial Infarction: Insights From the Midwest STEMI Consortium

2021 ◽  
Author(s):  
Michael Megaly ◽  
Mehmet Yildiz ◽  
Edward Tannenbaum ◽  
Brynn Okeson ◽  
Marshall W. Dworak ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Regression Analysis ◽  
Cox Regression ◽  
Cox Regression Analysis ◽  
St Segment Elevation ◽  
Incidence Trends ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Increased Risk

Background Contemporary real‐world data on stroke in patients presenting with ST‐segment–elevation myocardial infarction (STEMI) are scarce. Methods and Results We evaluated the incidence, trends, cause, and predictors of stroke from 2003 to 2019 in 4 large regional STEMI programs in the upper Midwest that use similar transfer and treatment protocols. We also evaluated the long‐term impact of stroke on 5‐year mortality. Multivariate logistic and Cox regression analysis was used to identify variables independently associated with stroke in patients presenting with STEMI and identify variables associated with 5‐year mortality. A total of 12 868 patients presented with STEMI during the study period. Stroke occurred in 98 patients (0.76%). The incidence of stroke remained stable over time (0.5% in 2003, 1.2% in 2019; P ‐trend=0.22). Most (75%) of strokes were ischemic, with a median time to stroke symptoms of 14 hours after primary percutaneous coronary intervention (interquartile range, 4–72 hours), which led to a small minority (3%) receiving endovascular treatment and high in‐hospital mortality (18%). On multivariate regression analysis, age (increment of 10 years) (odds ratio [OR], 1.32; 95% CI, 1.10–1.58; P ‐value=0.003) and preintervention cardiogenic shock (OR, 2.03; (95% CI, 1.03–3.78; P =0.032)) were associated with a higher risk of in‐hospital stroke. In‐hospital stroke was independently associated with increased risk of 5‐year mortality (hazard ratio, 2.01; 95% CI, 1.13–3.57; P =0.02). Conclusions In patients presenting with STEMI, the risk of stroke is low (0.76%). A stroke in patients presenting with STEMI is associated with significantly higher in‐hospital (18%) and long‐term mortality (35% at 5 years). Stroke was associated with double the risk of 5‐year death.

scholarly journals STEMI around-the-clock: how off-hours admissions impact door-to-balloon time and the long-term prognosis of ST-segment Elevation Myocardial Infarction

2021 ◽  
Vol 42 (Supplement_1) ◽  
Author(s):  
M Martinho ◽  
A Briosa ◽  
R Cale ◽  
E Pereira ◽  
A R Pereira ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Cox Regression ◽  
Clinical Severity ◽  
Cox Regression Analysis ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
Door To Balloon ◽  
Long Term Mortality

Abstract Introduction The outcomes of reperfusion in ST-segment Elevation Myocardial Infarction (STEMI) are time-dependent, and percutaneous coronary intervention (PCI) should be performed within 60 minutes from hospital admission in PCI centers – door-to-balloon time (D2B). The association between Off-Hours Admission (OHA) and long-term outcomes is controversial when considering contemporary organized STEMI networks. Purpose This study aims to analyze how OHA influences D2B and long-term mortality. Methods Retrospective study of consecutive STEMI patients (pts), admitted in a PCI-centre with a local Emergency Department, between 2010 and 2015. Pts submitted to rescue-PCI were excluded. OHA was defined as admission at night (8p.m. to 8a.m), weekends and nonworking holidays. Predictors of OHA and D2B were studied by logistic regression analysis. Demographic, clinical, angiographic and procedural variables were evaluated using stepwise Cox regression analysis to determine independent predictors of 5-year all-cause mortality (5yM). The cumulative incidence of 5yM stratified by hours of admission was calculated according to the Kaplan-Meier method. Results Of 901 pts, 472pts (52.4%) were admitted during off-hours. These pts were younger (61±13 vs 64±12, p=0.002) and had a lower median patient-delay time (128min vs 157min, p=0.014). Clinical severity at presentation, defined by systolic arterial pressure and Killip-Kimball (KK) class, did not differ between groups. OHA did not impact D2B (89 min vs 88 min, p=0.550), which was in turn influenced by age ≥75y (OR 1.85, 95% CI 1.31–2.61, p&lt;0.001). Mean clinical follow-up (FUP) was 68±37 months, with 75.1% of pts achieving a FUP &gt;5 years. 5yM rate was 9.7%. After multivariate cox regression analysis, independent determinants of long-term mortality were age (HR 1.05, 95% CI 1.02–1.08, p&lt;0.001), previous history of heart failure (HR 6.76, 95% CI 1.32–34.72, p=0.022) and pulmonary disease (HR 3.79, 95% CI 1.16–12.33, p=0.027), presentation with KK ≥2 (HR 2.82, 95% CI 1.32–6.01, p=0.007) and radial artery access in catheterization (HR 0.39, 95% CI 0.18–0.83, p=0.014) – figure 1. Although there was an association between a higher D2B time and 5yM (87min vs 101min, p=0.024), neither OHA nor D2B were independent predictors of long-term mortality – figure 2. Conclusion OHA did not seem to influence D2B and long-term STEMI outcomes in our PCI-centre. 5yM was mostly influenced by patient characteristics and clinical severity at presentation. FUNDunding Acknowledgement Type of funding sources: None. Figure 1. Predictors of long-term mortality Figure 2. 5-year survival stratified by OHA

Abstract 16476: Safety Profile of Bivalirudin in the Treatment of ST-Segment Elevation Myocardial Infarction Patients in Clinical Practice - Results From the Bremen STEMI Registry

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Robert Zabrocki ◽  
Eduard Fiehn ◽  
Harm Wienbergen ◽  
Susanne Seide ◽  
Johannes Schmucker ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Safety Profile ◽  
Real World Data ◽  
Killip Class ◽  
St Segment Elevation ◽  
Segment Elevation Myocardial Infarction ◽  
St Segment ◽  
All Cause Mortality ◽  
Heart Center ◽  
Current Guidelines

Introduction: Previous studies demonstrated that treatment of patients (pts) being affected by ST-segment elevation myocardial infarction (STEMI) with bivalirudin (biv) instead of heparin (hep) reduced rates of major bleedings. Results regarding a reduction in all-cause mortality are inconclusive, stent thromboses however were slightly increased. Real world data in pts with STEMI treated with biv in the era of new anti-thrombotic treatment are still spare. The aim of this study was to evaluate safety of biv for all-comers. Methods: All pts with STEMI from the metropolitan area of Bremen (Germany) are admitted to the Bremen heart center and documented in the Bremen STEMI-registry (BSR) since 2006. In May 2013 we adapted our anticoagulation strategy to the current guidelines from hep with glycoprotein IIb/IIIa inhibitors (GPI) to biv with provisional use of GPI. Pts receiving biv were compared to all pts until April 2013 in the BSR without chronic renal failure. Results: Baseline and interventional characteristics of 530 consecutive pts treated with biv and 5197 pts treated with hep are shown in table 1. Despite a higher portion of pts after resuscitation (10.3% vs 8.6%; p<0.01) and a higher incidence of Killip class 3 or 4 (15% vs 8%; p<0.001) in the biv group inhospital all-cause mortality showed no difference (biv: 6.8% vs hep: 7.3%, p=0.66). However pts treated with biv demonstrated highly significant lower bleeding rates (TIMI major/minor bleedings: 0.8% vs 3.7%, p<.01). Stent-thromboses showed a trend towards an increased event rate with biv (1.3%, 7pts vs 1.0%, 52pts, p=0.07). Conclusions: In one of the largest all-comers registries treatment with biv was associated with significantly lower minor and major bleedings. There is only a trend for a higher rate of stent thromboses in the biv group. Therefore, data from our all-comers registry support the beneficial safety profile of biv observed in clinical studies.

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