Acute ST-segment Elevation Myocardial Infarction Research Articles

Abstract 4134845: Primary Percutaneous Coronary Intervention versus Thrombolytic Therapy Outside Cardiology Reference Center for Acute Myocardial Infarction: A Meta-Analysis of Randomized Control Trials

Introduction: Fibrinolysis is the treatment of choice for patients with ST-elevation acute myocardial infarction (STEMI) who cannot reach door-to-balloon time for primary reperfusion therapy (PCI) 1. This therapy is widely used in some countries in Europe and Brazil2. However, these patients who undergo thrombolysis have a higher mortality rate compared to patients who undergo primary PCI3. The objective of the study is to evaluate the outcomes of mortality, reinfarction and stroke in patients with STEMI who underwent thrombolysis outside referral centers (community hospitals and inside ambulances) versus patients who underwent primary PCI. Methods: We performed a systematically review and meta-analysis of randomized control trials (RTCs) comparing of pre-hospital thrombolysis (PHT) with primary coronary intervention (PCI). PubMed, Embase and Cochrane databases were searched from April 2024 with the following search terms: ‘STEMI’, ‘myocardial infarction’[Mesh],’pre hospital’,’thrombolysis’,PHT, ‘thrombolytic therapy’. We used random-effects model to estimate the Risk Ration (RR) with 95% CI. Heterogeneity was examined with I2 statistics. We also performed leave-one-out sensitivity analyses and used Review Manager 5.4 for statistical analysis. The study was registered on PROSPERO: CRD42024547309. Results: A total of 1890 patients from 3 studies RTCs were included. Pre-hospital thrombolysis was used to treat STEMI in 940 patients (49%). Follow-up time varied from 4.6 to 5 years. The average age was 60.3 years. The anterior infarction on the ECG was similar between groups: average 43% (PHT) and 41.6% (PCI). Pre-hospital thrombolysis was associated with a higher risk of reinfarction ( RR 2.33; 95% CI 1.30-4.16; p=0.004; I2=0%) and composite outcomes of stroke, mortality and reinfarction(RR 1.67; 95% CI 1.25-2.23; p=0.0005; I2=0%). No significant differences were found between treatment groups regarding mortality (RR 1.23; 95% CI 0.70-2.18; p=0.47; I2=42%) and stroke (RR 3.82; 95% CI 0.54-27.23; p=0.18; I2=38%). Conclusion: This study suggests that pre-hospital thrombolysis is associated with a higher risk of reinfarction. More randomized studies on patients treated in a pre-hospital environment are needed to better investigate this question.

Abstract 4122092: Carotid plaque progression predicts persistent endothelial dysfunction in an infarct-related coronary artery in STEMI survivors

Background and Aim: Persistent coronary endothelial vasomotor dysfunction predicts future coronary events; however, performing multiple invasive endothelial function tests is difficult in actual clinical practice. This study examined whether carotid plaque changes can predict persistent coronary endothelial dysfunction using serial assessments of the coronary vasomotor response to acetylcholine (ACh) in the infarct-related artery (IRA) among patients with ST-elevation acute myocardial infarction (STEMI). Methods: This study included 169 consecutive patients with a first acute STEMI due to the left anterior descending coronary artery (LAD) occlusion who underwent successful reperfusion therapy with percutaneous coronary intervention. The vasomotor response to ACh in the LAD was measured within two weeks of acute myocardial infarction (AMI) (first test) and repeated at six months (second test) after AMI under optimal anti-atherosclerotic therapy. Ultrasonography of the bilateral common carotid artery (CCA) and internal carotid artery (ICA) was performed during the acute phase, and the thickest intima media thickness (IMT) of either artery was measured as the maximum IMT. After six months, the IMT at the site of maximal IMT was measured to determine whether there was an increase or decrease in IMT. Results: Finally, 87 STEMI patients analyzed in this study. At 6 months, 25 patients (28.7%) showed carotid plaque progression. In a multivariable adjusted analysis, carotid plaque progression was identified as an independent predictor of persistent coronary endothelial dysfunction, both in terms of coronary diameter response [OR 3.22, 95% confidence interval1.13 - 9.15, P = 0.03] and coronary flow response [OR 2.65, 95% confidence interval 1.01 - 7.00, P = 0.04]. Conclusions: Carotid plaque progression could independently predict persistent endothelial vasomotor dysfunction in the IRA of STEMI survivors.

Abstract 4135229: Endothelial glycocalyx shedding during ST-elevation acute myocardial infarction

Background: Endothelial glycocalyx (eGC) is a layer of glycosaminoglycans adhered to proteoglycans that cover the inner surface of the vessels. The integrity of this structure sustains some vascular properties such as shear stress-induced nitric oxide release and the prevention of platelets and neutrophils adhesion on the vessel surface. eGC shedding could contribute to atherosclerotic plaque vulnerability and acute myocardial infarction (AMI) installation. This research investigated whether acute eGC damage and microvascular dysfunction occurred during AMI. Methods: Sublingual microcirculation was assessed through Capiscope HCVS Handheld Video Capillaroscopy System (KK Technology, Honiton, UK) during the first 72h of hospital admission because of ST-elevation AMI (before) and repeated around six months later (after). All images were automatically analyzed using the GlycoCheck (Alpine, UT, USA), which estimated the perfused vascular density (PVD), the red blood cell (RBC) filling of the vessels, the perfused boundary region (PBR) in µm, an inverse parameter of the eGC thickness; and the microvascular health score (MVHS). This score ranges from 0-10; the lower its numerical value, the greater the microvascular impairment. Results: Twenty patients were included (61±10 years old, 85% males, 55% anterior AMI, 70% hypertension, 25% diabetes, 45% current smoker, all underwent primary PCI). The time between the two sublingual assessments was 188±31 days. The PBR [1.96±0.22µm vs. 1.84±0.19µm]; p=0.047 and flow-adjusted PBR [1.40±0.25µm vs. 1.24±0.16µm]; p=0.045 decreased statistically significant over time. The RBC filling [71.56±4.33% vs. 74.02±3.88%]; p=0.016 and the MVHS [4.28 (interquartile range (IRQ) 3.38-4.90) vs. 5.04 (IQR 4.37-6.00)]; p=0.044 increased statistically significant over time. The PVD [500±86 x10-2µm/mm vs. 522±84x10-2µm/mm]; p=0.255 did not modify over time. Conclusion: This finding was compatible with eGC shedding and microvascular dysfunction during AMI and later reconstitution of this structure after six months.

Abstract 4134655: Clinical Outcomes of Patients with Alcoholic Cirrhosis and Acute STEMI Undergoing PCI

Original research: Background: The objective is to evaluate the outcomes of percutaneous coronary intervention (PCI) in patients with alcoholic cirrhosis presenting with ST-segment elevation myocardial infarction (STEMI). Methods: We analyzed data from the National Inpatient Sample (NIS) for the years 2016-2020. Our cohort included patients admitted with STEMI and a secondary diagnosis of alcoholic cirrhosis, excluding those under 18 or those not receiving PCI. Propensity score matching using a kernel method was applied to adjust for 22 variables, including patient demographics, hospital characteristics, and comorbid conditions. Results: Among 119,799 patients, 98 had alcoholic cirrhosis. These patients exhibited higher mortality (18% vs. 5%) and longer hospital stays (5.4 days vs. 3.6 days). They also had increased risks of acute blood loss anemia (13% vs. 3.5%) and gastrointestinal bleeding (18% vs. 2%). Additionally, acute kidney injury was more prevalent in the cirrhosis group (25.5% vs. 14%). Although heart failure exacerbation and cardiac arrhythmias were more common, these were not statistically significant (Table 1). Conclusion: Our study indicates a significantly higher mortality rate among patients with alcoholic cirrhosis undergoing PCI for STEMI. These patients are also at increased risk of postoperative bleeding due to compromised liver function and hemostatic abnormalities, as reflected by higher incidences of acute blood loss anemia and gastrointestinal bleeding. Additionally, there is an elevated risk of acute kidney injury post-PCI, highlighting the need for renal-protective strategies. These findings stress the necessity for specialized care, vigilant monitoring, and tailored protocols to address the unique challenges faced by this population, aiming to reduce morbidity and mortality.

Performance Measures in the Management of ST-Segment Elevation Myocardial Infarction Patients at Manila Doctors Hospital

INTRODUCTION: ST-segment elevation myocardial infarction (STEMI) is a common and potentially fatal presentation of cardiovascular disease. Once a diagnosis is made, prompt intervention is crucial, with substantial effect on morbidity and even mortality. OBJECTIVE: The aim of this study was to assess the adherence of physicians of a tertiary care hospital to American College of Cardiology/American Heart Association and European Society of Cardiology performance measures for the management of acute STEMI patients. METHODOLOGY: This was a descriptive retrospective chart review of acute STEMI patients seen in a tertiary care hospital over a 2-year period. RESULTS: A total of 118 STEMI patients were included in the study. Mean age was 57.8 years with male predominance. High adherence rates (100% achievement score) to recommended discharge medications and counseling for smoking cessation were observed. However, performance measures for time to reperfusion therapy via percutaneous coronary intervention (average, 16.7% over 2 years) and referral to cardiac rehabilitation (average, 38.0%) were consistently low, although time to percutaneous coronary intervention improved from an average of 170 minutes to 142 minutes in the second year of this study. CONCLUSION: For 2 consecutive years, all STEMI patients seen in our institution were adequately managed with regard to recommended medications. All patients have been advised lifestyle change, particularly smoking cessation for current smokers. There is room for improvement with regards to time to reperfusion therapy and referral to cardiac rehabilitation. Some measures have been suggested, including shortening the time to secure patient consent. KEYWORDS: myocardial infarction, performance measures, STEMI

Marfan's Syndrome with Acute Inferior Wall ST-segment Elevation Myocardial Infarction in A Combined Family of 13 Cases

Marfan's syndrome (MFS) is a rare autosomal dominant connective tissue disorder, often associated with genetic mutations and most patients have a family history of the disease. Its clinical manifestations are mainly skeletal, ocular and cardiovascular pathologies. We report a case of a 34-year-old male diagnosed with Marfan's syndrome at the age of 22 and presenting with ocular symptoms. Following an episode of sudden chest pain, he was admitted to the hospital with an acute inferior wall ST-segment elevation myocardial infarction, and was diagnosed with a mid-right coronary artery occlusion by coronary angiography. He underwent coronary artery balloon dilatation to restore grade 3 flow, and a stent was implantated 4 months later. In a subsequent epidemiologic survey of 26 family members from 4 generations, 13 members were diagnosed with Marfan's syndrome, all of them presented with ocular signs. After more than 3 years of follow-up of the entire family, there is currently no one with coarctation of the aorta and no sudden death. Since some patients with Marfan's syndrome can present with acute chest pain complicated by aortic coarctation, if the coarctation involves the aortic root it can lead to severe stenosis or occlusion of the coronary arteries, resulting in electrocardiograms showing typical changes for a ST-segment elevation myocardial infarction. Considering the complexity and life-threatening nature of Marfan's syndrome, it is important consider the various etiologies of chest pain in patients with Marfan's syndrome.

EVALUATION OF THE FUNCTIONAL STATE OF KIDNEYS IN PATIENTS WITH ACUTE MYOCARDIAL INFARCTION BASED ON THE DETERMINATION OF CREATININE AND CYSTATIN C LEVELS

Aim – to evaluate the functional state of kidneys, glomerular filtration rate based on the determination of creatinine and Cystatin C in STEMI patients undergoing urgent revascularization.Methods and materials. The study included 286 patients with acute myocardial infarction and ST-elevation myocardial infarction (STEMI). Among the examined persons, 202 (70.6%) were men and 84 (29.4%) were women, with an average age of (62.8±9.8) years.Research results. The GFR calculated by the CKD-EPI formula in the examined group of STEMI patients ranged from 15.6 to 87.4 and averaged 51.0±14.3 ml/min∙m2.7. The value of the calculated GFR according to the CKD-EPI Cystatin C formula ranged from 11.1 to 88.1 and averaged 45.7±13.7 ml/min/1.73 m2. The non-parametric Spearman rank correlation analysis showed a high direct correlation between the values of GFR calculated by different formulas (CKD-EPI and CKD-EPI Cystatin C) - R=0.81; p<0.0001. Using the linear regression method, a formula was derived for the conditional calculation of GFR value according to CKD-EPI Cystatin C = 4.15 + GFR value according to CKD-EPI 0.814. Regression coefficient R2 = 0.84 (Fisher's correlation coefficient - F = 728.34 at the proper level = 1.28), p < 0.000001.Conclusions. Determination of GFR based on Cystatin C demonstrates lower rates in both men and women. A decrease in estimated GFR was related to older age and female gender.

Stent thrombosis in the setting of ST-segment elevation acute myocardial infarction in the contemporary practice: results from the TOTAL randomized trial.

The aim was to know the risk and predictive factors of stent thrombosis (ST) in patients with ST-elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (PCI) in the contemporary practice. The TOTAL [ThrOmbecTomy with percutaneous coronary intervention (PCI) versus PCI ALone] randomized trial, being the largest trial performed in the setting of STEMI with a general application of the recent recommendations, represents a unique opportunity to know the current real-world incidence of ST as well as its associated factors. A total of 10 064 patients that received ≥1 coronary stent in the TOTAL trial comprise the study population. The risk, predictive factors, and clinical implications of ST was studied. During 1-year follow-up, 155 patients (1.54%) suffered definitive or probable ST (59 acute, 67 subacute, and 29 late). Previous infarction, the number of stents, the previous use of clopidogrel, and the use of diuretics at discharge were independent predictors for ST, whereas the use of upfront glycoprotein IIb/IIIa inhibitors, radial access, and treatment with statins at discharge were independent protective factors. The number of stents, stent diameter, upfront treatment with IIb/IIIa inhibitors, previous treatment with clopidogrel, and treatment with statins at discharge were independently associated with the risk of early ST. Only previous infarction was associated with the risk of late ST. In the contemporary practice, ST still constitutes a frequent complication of primary PCI for STEMI, occurring in 1.5% of patients. Independent predictors are different depending on the time of ST.

Acute coronary syndrome as the initial manifestation of infective endocarditis in an apparently normal native valve: a case report

Abstract Background Acute coronary syndrome (ACS) is a rare complication of infectious endocarditis (IE). We present the case of a patient with a bicuspid aortic valve who presented an acute ST elevation myocardial infarction (STEMI) of the inferior wall secondary to vegetation that generated obstruction of the ostium of the right coronary artery (RCA). Case summary A 54-year-old patient with only a history of smoking was admitted for chest pain. An acute ST elevation myocardial infarction (STEMI) in the inferior wall was documented; he underwent an emergent coronary angiography, which showed a mass that obstructed the ostium of the right coronary artery that did not allow its channeling. An angiotomography of the aorta was performed, where dissection was ruled out and the presence of a mass in the right coronary sinus that protruded towards the ostium of the coronary artery was confirmed. In the extension studies, a bicuspid aortic valve, thrombosis in the right brachial artery and in the infrarenal abdominal aorta were documented. Discussion The case was taken to a medical meeting and given the embolic and mechanical compromise; it was decided to perform surgery where a mass that invaded the proximal segment of the right coronary artery was resected. The histopathological study documented findings of vegetation; the cultures were positive for Staphylococcus epidermidis, and he finally received antibiotic and anticoagulation treatment.

Acute Ischemic Stroke and STEMI in A 78-Year-Old Female: A Case Report of Dual Life-Threatening Events and Complicated Recovery

Ischemic stroke and ST-elevation myocardial infarction (STEMI) occurring at the same time, are very rare conditions that cause major difficulties in management and present high mortality rates. This manuscript brings into focus a 78-year-old woman who had known diabetes mellitus (DM), hypertension (HTN), dyslipidemia, and ischemic strokes in the past, who presented with focal neurological deficits in the form of sudden onset slurring of speech and facial asymmetry which on investigation revealed a large left middle cerebral artery (MCA) infarction. Few hours later she developed STEMI with ECG changes and raised troponin levels. The patient experienced respiratory difficulty for which the patient was intubated. A percutaneous intervention (PCI) was attempted with moderate results. Complications included heart failure, atrial fibrillation (AF), and septic shock due to a urinary tract infection (UTI) that delayed her discharge from the hospital. Nevertheless, the effective treatment and cooperation between cardiologists and neurologists, stabilized her condition. This case shows the challenges of managing dual pathology (stroke and STEMI simultaneously); therefore, early diagnosis and multidisciplinary management offer the best prognosis to realize optimal outcomes.

Relationship between Myocardial Performance Index (Tei Index) and angiographic severity of coronary artery disease in patients with Acute ST Elevation Myocardial Infarction

Background: Tei index is a Doppler derived measure of combined systolic and diastolic myocardial function and a better predictor of global LV function and outcome in patients with acute STEMI. The objective of this study was to determine the relationship between the myocardial performance index of LV (Tei index) and angiographic severity of coronary artery disease as assessed by SYNTAX score in patients with acute STEMI. Methods: This was a prospective, observational single centered study conducted from March 2022 to November 2022 at Manmohan Cardiothoracic Vascular and Transplant Centre, Institute of Medicine. (MCVTC, IOM). 160 patients with acute STEMI were enrolled. LV Tei index was calculated with the help of 2D and Tissue Doppler imaging, and the lesion severity was categorized with the help of SYNTAX score after the patients underwent coronary angiography. Results: The mean age was 61.23±12.33 years with a male preponderance. 107 (67%) were male with male to female ratio of 2:1. Tei index was significantly higher among the hypertensive (0.74±0.17) and diabetic (0.78±0.18) patients. 64 (40%), 51(31.9%) and 45(28.1%) had Single vessel disease (SVD), Double vessel disease (DVD) and Triple vessel disease (TVD) respectively with the Mean Tei index values 0.57 ± 0.10, 0.76 ± 0.11, and 0.88±0.11 (p<0.05). The Tei index increased when patients were divided into low, mid, and high SYNTAX score groups as 0.58±0.11, 0.61±0.73, 0.88±0.13 respectively, p-value < 0.05). Moreover, the study showed a positive correlation between Tei index and SYNTAX score with increasing severity of coronary artery stenosis. (r=0.654, p-value<0.001). Proximal LAD, LCx and RCA lesions had greater Tei index than the distal lesions. Conclusion: More proximally located LAD, LCx, RCA lesions had higher value of Tei index, as assessed with the SYNTAX score.

Platelet-to-albumin ratio is an independent predictor for ventricular aneurysm formation in ST segment elevation myocardial infarction.

Left ventricular aneurysm (LVA) is a common complication of acute myocardial infarction. We aimed to investigate the association of the platelet-to-albumin ratio (PAR) with LVA formation in patients with acute ST segment elevation myocardial infarction (STEMI) who underwent primary percutaneous coronary intervention (PCI). A total of 767 consecutive patients with STEMI were prospectively enrolled. Logistic regression analysis and restricted cubic spline (RCS) were used to assess the association between PAR and LVA formation. The predictive ability of PAR and combined variable for LVA formation were assessed using receiver-operating characteristic (ROC) curve. The prevalence of LVA was 14.1%. Univariable logistic regression analysis revealed that PAR was associated with the risk of LVA at both 1 month [odds ratio (OR) = 4.42, P < 0.001] and 6 months (OR = 4.35, P < 0.001) of follow-up. The predictive value of PAR remained significant even after multivariate logistic regression analysis at 1 month (OR = 3.42, P = 0.004) and 6 months (OR = 4.28, P < 0.001). RCS analysis revealed a nonlinear association between a higher PAR and an increased risk of LVA (nonlinear P < 0.05). In addition, the predictive abilities of PAR for LVA were 0.659. The combination of PAR, hemoglobin, left ventricular ejection fraction, and the use of angiotensin-converting enzym inhibitor/angiotensin receptor blocker significantly enhanced the ability to predict LVA formation (C statistic= 0.887). A higher PAR was significantly associated with an increased risk of LVA formation in patients with acute STEMI who underwent primary PCI.

Right bundle branch block in suspected acute coronary syndromes: Diagnostic challenges, treatment and prognosis

BackgroundThere is still conflicting evidence regarding the prognostic implications of right bundle branch block (RBBB) in the general population but also in patients with heart diseases like acute coronary syndromes (ACS). In accordance with current guidelines, RBBB in ACS patients is considered as STEMI equivalent. However, recent studies indicate that further differentiation is necessary in this group, as we will outline below. Methods and resultsA literature search was conducted in PubMed and Google Scholar.In previous studies, RBBB in the general population were mostly considered benign changes of the electrical conduction system. However, recent studies indicate that both complete and incomplete RBBB are associated with increased cardiovascular morbidity and mortality. In addition, among unselected patients with suspected ACS presenting to the emergency department, the prevalence of RBBB was 3 % and it was associated with elevated mortality. The subsequent angiographic identification of a culprit coronary artery stenosis leading to stent implantation was similar at approximately 2 % regardless of the initial ECG presentation with narrow QRS complexes, left bundle branch block (LBBB), or RBBB.Finally, in a group of high-risk patients for ST-elevation myocardial infarction (STEMI), the prevalence of RBBB was 12 %. While RBBB was associated with poor outcome compared to non-BBB and LBBB patients, diagnostic accuracy of STEMI criteria was not affected by the presence of RBBB. However, RBBB patients without distinct STEMI signs in ECG often showed acute STEMI on angiography indicating a potential benefit from immediate transfer to the cardiac catheterization laboratory. ConclusionIn the general population, patients with RBBB and risk factors may need further evaluation. Regarding ACS patients, recent studies support current guidelines that recommend acute invasive evaluation for high-risk ACS patients with RBBB, regardless of ST-T deviations. However, in an unselected group of ACS patients, differential diagnoses should also be investigated through additional diagnostic procedures.

Clinical presentation, management and outcomes of myocardial infarction in the Heart Center, Al-Thawra Hospital, Sana'a City, Yemen: Stemi cardiac arrest management outcomes

Background and aim: Acute ST-segment elevation myocardial infarction (STEMI) is a critical medical emergency requiring emergency evaluation, diagnosis, and intervention. The aim of the study was to evaluate the clinical presentation, type of treatment, and outcomes of patients with acute ST-segment elevation myocardial infarction at the Heart Center of Al-Thawra Hospital, Sana'a. Methods: prospective study. We enrolled all patients with a final diagnosis of STEMI who have been admitted to the cardiac CCU in the cardiac center in AL-Thawrah Hospital during one year, January to December 2023. Results: A total of 358 patients with STEMI were analyzed. The mean age was 55 ± 8 years old, with male patients representing 80% (286)). The traditional risk factors among these patients were: hypertension 28.23% (101), smoking represents 26.05% (93), diabetes mellitus represents 19% (68), BMI &gt; 30 kg/m2 represents 16.34% (57), and khat chewing represents 78.2% (279). STEMI patients who managed by primary PCI were 14% (50). Patients who have been managed by thrombolytic therapy were 28% (101) and the conventional medical treatment was managed for those who arrived after 12 hours and represent 58%% (204). The most commonly used thrombolytic was streptokinase in 96% (97) of patients who received thrombolytics. Primary PCI within 24 hours has been done in 14% (50) of cases. Heart failure (EF &lt; 50%) represented (26%) (93), cardiovascular shock was 13% (46 cases), and mortality rate was 11% (39 cases))

Time trends in mortality, incidence and case-fatality of acute myocardial infarction in Norway - do we see the end of the coronary heart disease epidemic?

Abstract Background In Norway and most industrialized countries the mortality rates from acute myocardial infarction (AMI) increased after World War II, peaked in the 1960s – 1970s, and have since that time declined (Figure). Recent studies have suggested that the decline may have leveled off, and that the favourable trends do not include younger age groups, possibly due obesity and diabetes. Also, the relative contribution of a reduction in incidence and improved case-fatality rates (CFR) to the AMI mortality trends are not known with certainty. We examined mortality trends of AMI in Norway during 1951 – 2021, and the incidence and CFR of hospitalized and non-hospitalized AMI during 2013-2021. Methods Fatal AMI cases were identified in the National Causes of Death Registry. Norwegian hospitals are required by law to register all patients hospitalized for AMI in the Norwegian AMI Registry. Hospitalized cases not registered in the AMI registry were retrieved from the Norwegian Patient Registry which contains discharge diagnoses for hospitalized patients. The national unique 11-digit identification number allowed linkage of the registries and identification of transfers between hospitals and re-hospitalizations. An AMI (either hospitalization or death) was classified as incident if no hospitalization was found for that individual during the previous 5 years. We calculated age-adjusted rates with the Norwegian population in 2017 as standard. Results Norwegian AMI mortality rates increased from 1951, peaked in the late 1960s, and have since that time declined steadily, although steeper after around 1990 (Figure). Present AMI mortality rates are lower than in the 1950s, and are still declining. Incidence of AMI (hospitalized and non-hospitalized) fell from 391/100 000 in 2013 to 271/100 000 in 2021, corresponding to a mean reduction of 3.6 % per year (p&amp;lt;0.001). Incidence of out-of-hospital fatal AMI fell by 6.5 % per year, incidence of hospitalized ST-segment elevation AMI (STEMI) fell by 2.3 % per year, and incidence of non-ST-segment elevation AMI (NSTEMI) fell by 3.1 % per year (all p&amp;lt;0.001). 30-days CFR of hospitalized and non-hospitalized AMI fell from 21.3 % in 2013 to 17.5 % (3.6 % per year; p&amp;lt;0.001). CFR after NSTEMI fell from 8.2 % in 2013 to 6.4 % in 2021 (4.4 % per year; p&amp;lt;0.001), whereas there was no significant change in CFR after STEMI (13.3 % in 2013 and 12.0 % in 2021). The incidence and CFR trends were similar in men and women aged 20-49, 50-79 and 80+ years. Comments Declining incidence of out-of-hospital fatal AMI and declining incidence of hospitalized STEMI and NSTEMI were major contributors to the declining AMI mortality rates in Norway. Improved case-fatality rates among hospitalized patients have contributed to the declining mortality rates, but there was no improvement in case-fatality in STEMI during 2013-2021.

The clinical characteristics and prognosis of patients with acute ST-segment elevation myocardial infarction complicated with impaired activity daily living

Abstract Background Previous studies have indicated that activities of daily living (ADL) can influence the prognosis of patients with acute myocardial infarction. The purpose of this study is to delineate the clinical characteristics, treatment regimens, and prognosis of patients with acute ST-segment elevation myocardial infarction (STEMI) who have impaired ADL. Methods The data for this study were derived from a Health and Medical Big Data Superplatform, comprising a retrospective cohort of patients admitted to and discharged from 72 secondary and tertiary hospitals from 2010 to 2023. The inclusion criteria encompassed patients with a discharge diagnosis of STEMI.ADL prior to STEMI was evaluated using the Barthel index(BI),a widely used assessment tool for evaluating ADL.The patients' BI were obtained from their resident health records.Patients were categorized into two groups: ADL normal group and ADL impaired group. A comparative analysis was conducted between the two groups regarding clinical characteristics, treatment regimens, and prognosis. Results This study included 24,906 STEMI patients with normal ADL and 1,002 STEMI patients with impaired ADL. Baseline data revealed that patients in the ADL impaired group had a higher proportion of females (43.0% vs. 37.8%, p=0.001), were older (74.0[64.0,81.0] vs. 69.0[65.0,75.0], p&amp;lt;0.001), and had a higher proportion of Killip III and above (24.30% vs. 14.10%, p&amp;lt;0.001). Additionally, the ADL impaired group had a higher prevalence of comorbidities. In terms of treatment, the ADL impaired group had lower proportions of patients undergoing percutaneous coronary intervention (PCI) (43.8% vs. 65.3%, p&amp;lt;0.001) and primary PCI (PPCI) (36.4% vs. 55.1%, p&amp;lt;0.001). Additionally, the ADL impaired group exhibited lower utilization rates of antiplatelet drugs, ACEI/ARB, beta-blockers, ARNI, and statins, but higher rates of diuretics and cardiac glycosides. Regarding prognosis, the ADL impaired group had a higher in-hospital mortality rate (5.69% vs. 2.89%, p&amp;lt;0.001). The median follow-up time was 1,220 days. In the ADL impaired group, the rates of all-cause mortality (52.0% vs. 24.7%, p&amp;lt;0.001), cardiovascular mortality (37.3% vs. 17.3%, p&amp;lt;0.001), recurrent non-fatal myocardial infarction (11.1% vs. 8.30%, p=0.002), and recurrent stroke (11.9% vs. 8.66%, p=0.001) were higher. However, the rate of revascularization was lower in the ADL impaired group (6.69% vs. 9.20%, p=0.008), and the risk of cerebral hemorrhage showed no significant difference (1.00% vs. 0.81%, p=0.631). In a multivariate Cox regression analysis adjusting for age, gender, Killip, medical history, and treatment strategies, impaired ADL remained an independent risk factor for increased all-cause mortality (aHR 1.309, 95% CI: 1.195-1.434, p&amp;lt;0.001). Conclusions Impairment of ADL is associated with adverse clinical outcomes in patients with STEMI.Baseline characteristics of patientsMedications of patients

Multi-biomarker approach for predicting cardiac magnetic resonance parameters at 30 days after ST-segment elevation myocardial infarction

Abstract Background Prior data showed associations of circulating Proprotein Convertase Subtilisin / Kexin type 9 (PCSK9) and inflammatory/anti-fibrotic Cellular Communication Network factor 1 (CCN1) at index ST-segment elevation acute myocardial infarction (STEMI) with left ventricular ejection fraction at 6 and 12 months, respectively and for CCN1 also with infarct size. Purpose PCSK-9, CCN1 and reference biomarkers high-sensitivity Troponin T (hsTNT) and N-terminal pro-brain natriuretic peptide (NTproBNP) were measured in patients from the CLEVER-ACS trial (clinicaltrials.gov NCT01529554) at presentation with STEMI and correlated with clinically relevant cardiac magnetic resonance (CMR) parameters at 30 days. Methods Associations between baseline biomarkers (PCSK-9, CCN1, hsTNT, NTproBNP) and CMR parameters at 30 days were evaluated using Spearman correlation and linear regression analysis (dichotomised at their median). Receiver operating characteristic (ROC) and area under the curve (AUC) were determined for significant values based on correlation analysis; AUC &amp;gt; 0,7 considered relevant. CMR parameters comprised left ventricular structural and functional parameters including scar mass and microvascular obstruction. Results We identified 56 STEMI patients (mean age 61.7 ± 11.2 (SD) years) who completed 30 days follow-up with biomarker data. Among biomarkers, significant associations with CMR parameters were only found for hsTNT, and NTproBNP. The strongest associations were found for left ventricular ejection fraction (LVEF; hsTNT RSp =-0.66; NTproBNP RSp =-0.57), left ventricular scar (LVSCAR; hsTNT RSp =0.58; NTproBNP RSp =0.56) and scar mass (SM; hsTNT RSp =0.65; NTproBNP RSp =0.55). Conversely, left ventricular end-diastolic volume index (LVEDVI; hsTNT RSp =0.47; NTproBNP RSp =0.32), left ventricular end-systolic volume index (LVESVI; hsTNT RSp =0.51; NTproBNP RSp =0.39) and microvascular obstruction (MVO; hsTNT RSp =0.34; NTproBNP RSp =0.34) were significantly, albeit only modestly associated. ROC and AUC analysis yielded relevant associations of biomarkers with CMR parameters LVEF (hsTNT=0.79; NTproBNP=0.81), LVSCAR (hsTNT=0.84; NTproBNP=0.76) and scar mass (hsTNT=0.83; NTproBNP=0.78). Furthermore, relevant associations of biomarkers with CMR were found for LVEDVI (hsTNT=0.79; NTproBNP=0.72), LVESVI (hsTNT=0.84; NTproBNP=0.72) and MVO (hsTNT=0.72; NTproBNP=0.71). Conclusion Baseline levels of hsTNT and NT-proBNP are strong predictors for functional and dimensional CMR parameters of the left ventricle including clinically relevant imaging surrogates of myocardial injury shortly after STEMI.ROC LVEF

Supersaturated oxygen therapy in patients with acute anterior myocardial infarction reduces infarct size

Abstract Background Myocardial final infarct size (FIS) is associated with heart failure hospitalizations and mortality in patients with ST-segment elevation myocardial infarction (STEMI). Interventional therapies beyond primary percutaneous coronary intervention (PCI) to reduce FIS are needed. Hyperoxemic supersaturated oxygen therapy (SSO2) has shown to reduce infarct size in previous clinical trials. Methods We performed routine SSO2 therapy in patients with acute anterior STEMI after successful primary PCI. Results from 22 SSO2 patients were compared with those from 22 pair-matched non-SSO2 acute anterior STEMI patients. Cardiac magnetic resonance imaging (MRI) was performed to assess left ventricular (LV) function, myocardial FIS (late gadolinium enhancement), area-at-risk (AAR, myocardial oedema), myocardial salvage index (MSI, proportion of non-necrotic inside oedematous myocardium), and microvascular obstruction (MVO, necrotic myocardium within the infarct zone). Results Both groups did not significantly differ regarding sex, age, weight, body mass index, hypertension, dyslipidaemia, smoking and diabetes status, prehospital cardiac arrest, door-to-balloon time, TIMI flow before and after PCI, numbers of stents placed, and renal function (p&amp;gt;0.1 each). SSO2 patients had significant lower maximum creatine kinase levels (2111 U/l) vs. non-SSO2 patients (4571 U/l, p=0.003). Cardiac MRI was performed 4 ± 2 days after PCI. LV ejection fraction (48% in SSO2 vs. 43% in non-SSO2, p=0.11) and AAR (42% of LV mass in SSO2 vs. 48% of LV mass in non-SSO2, p=0.096) did not significantly differ between the groups. SSO2 significantly reduced FIS by 38% (21% of LV mass vs. 34% of LV mass, p&amp;lt;0.001). MSI was significantly higher in SSO2 patients (46% vs. 18%, p&amp;lt;0.001). MVO occurred in 60% of SSO2 patients vs. 90% of non-SSO2 patients with a significant absolute difference (2.3% in SSO2 vs. 5.7% in non-SSO2, p=0.011). Conclusion While areas at risk were similar between both groups, SSO2 significantly reduced maximum creatine kinase levels, final infarct size and microvascular obstruction in patients with acute anterior STEMI.

Relation of plasma neuropeptide-Y with myocardial function and infarct severity in acute ST-elevation myocardial infarction

Abstract Background Acute myocardial infarction is associated with high levels of cardiac sympathetic stimulation, which leads to the release of the co-transmitter neuropeptide-Y (NPY). NPY acts as a potent vasoconstrictor and an association with increased risk for heart failure and microvascular dysfunction after acute ST-elevation myocardial infarction (STEMI) has been suggested. Purpose This study aims to comprehensively evaluate the association of plasma NPY with myocardial function and infarct severity, visualized by cardiac magnetic resonance (CMR) imaging, in STEMI patients revascularized by primary percutaneous coronary intervention (PCI). Methods In this observational study, we included 260 STEMI patients treated with primary PCI. Plasma NPY concentrations were measured by an immunoassay 24h after PCI from peripheral venous blood samples. Left ventricular ejection fraction (LVEF), global longitudinal strain (GLS), infarct size (IS) and microvascular obstruction (MVO) were determined using CMR imaging 4 days and 4 months after PCI. Results Median plasma concentrations of NPY were 70 [interquartile range (IQR): 35-115] pg/ml. NPY levels above median were significantly associated with lower LVEF (48% vs. 52%, p=0.004), decreased GLS (-8.8% vs. -12.6%, p&amp;lt;0.001) and larger IS (17% vs. 13%, p=0.041) in the acute phase after infarction as well as in the chronic stage (LVEF: 50% vs. 52%, p=0.030, GLS: -10.5 vs. -12.9, p&amp;lt;0.001, IS: 13% vs. 10%, p=0.011). In addition, NPY levels were significantly related to presence of MVO (58% vs. 52%, p=0.041). Moreover, in multivariable linear regression analysis, NPY remained significantly associated with all investigated CMR parameters (LVEF: p&amp;lt;0.001, GLS: p&amp;lt;0.001, IS: p=0.003, MVO: p=0.042) independent of other established clinical variables including high-sensitivity cardiac troponin T, pre-interventional TIMI flow 0 and left anterior descending artery as culprit lesion location. Conclusion High plasma levels of NPY, measured 24h after STEMI, were independently associated with lower LVEF, decreased GLS, larger IS as well as presence of MVO, indicating plasma NPY as a valuable biomarker for optimized risk stratification.

Real-life impact of complete revascularization of non-ST elevation myocardial infarction during index hospitalization

Abstract Introduction patients with non-ST elevation acute myocardial infarction (NSTEMI) frequently present multivessel disease (MVD) with significant stenosis in non-infarct-related arteries (non-IRA). Unlike for ST elevation acute myocardial infarction, there is a paucity of studies evaluating the prognostic impact of complete revascularization in these patients. In fact, recommendation for complete revascularization is based in observational and non-randomized studies suggesting a possible benefit regarding mortality and major cardiovascular events. Purpose to evaluate the prognostic impact of complete revascularization during the index hospitalization in the Portuguese patients with NSTEMI and MVD. Methods patients hospitalized for NSTEMI with MVD included in a national multicentre retrospective study between October 2010 and December 2022 were divided into two groups: group 1 was submitted to complete percutaneous revascularization during the index hospitalization (IRA and non-IRA with diameter stenosis ≥50% on angiography), and group 2 performed IRA-only revascularization. The impact of complete revascularization on the probability of cardiovascular re-hospitalization, as well as on in-hospital and one-year mortality rates was evaluated. Results a total of 3084 patients was included, 74.8% were males, with a mean age of 67.8±11.9 years. Most patients were submitted to IRA-only revascularization (72.9%). From the remaining, 81.4% performed complete revascularization during the index procedure and 18.6% staged during index hospitalization. Group 1 patients were younger (65.5±11.8 vs. 68.6±11.8 years, p&amp;lt;0.001), with fewer comorbidities and slightly higher left ventricular ejection fraction (55±11 vs. 51±11%, p&amp;lt;0.001). On the other hand, group 2 patients revealed a significantly higher percentage of previous, revascularization (14.8% vs. 1.6%), mostly surgical. Besides overall similar incidence of in-hospital complications, including recurrence of acute myocardial infarction, patients submitted to complete revascularization showed a non-significant trend to an inferior in-hospital mortality rate (0.7 vs. 1.6%, p=0.06). Also, 1-year mortality rate was similar between groups (4.2 vs. 5.0%, p=0.54). However, complete revascularization appeared to result in a long-term prognostic benefit, halving the incidence of unplanned cardiovascular re-hospitalizations at one year of follow-up (9.3 vs. 18.8%, p&amp;lt;0.001). Conclusion complete revascularization led to an overall long-term benefit, mainly due to a reduction in cardiovascular re-hospitalizations, without a significant impact on 1-year mortality rate.