Acute Anterior Myocardial Infarction Research Articles

Effects of sacubitril/valsartan on ventricular remodeling in patents with left ventricular systolic dysfunction following acute anterior wall myocardial infarction.

The aim of this study was to investigate the effect of sacubitril/valsartan (Sal/Val) on left ventricular (LV) remodeling in patients with LV systolic dysfunction following acute anterior wall myocardial infarction (AAMI). AAMI patients with LV systolic dysfunction were enrolled in this study. All patients underwent percutaneous coronary intervention. After hemodynamic stabilization, patients were randomly assigned either to group T (Sal/Val treatment) or group C (enalapril treatment). Changes in echocardiographic parameters and plasma biochemical markers were used to evaluate the effects of Sal/Val on LV remodeling and cardiac function. The incidence of major cardiac adverse events (MACEs) and adverse reactions during follow-ups was also recorded. In total, 137 eligible patients were prospectively included. Compared to group C, LV ejection fraction significantly improved (P < 0.05), while the LV end-systolic volume index and wall motion score index showed a tendency to decrease in group T. There was no difference in the LV end-diastolic volume index between groups. During follow-ups, the plasma N-terminal pro-B-type natriuretic peptide and soluble suppression of tumorigenesis-2 levels in both groups decreased (all P < 0.05), and the change was more prominent in group T. Additionally, drug-related adverse effects were similar between the two groups (P > 0.05); however, the incidence of MACEs was lower in group T than in group C (39.71% vs. 53.62%, P = 0.103), although the difference was insignificant. Sac/Val attenuated LV remodeling and dysfunction and was safe and effective in LV systolic dysfunction patients post AAMI.

A middle-aged male patient with de Winter syndrome: a case report

BackgroundDe Winter syndrome accounts for approximately 2% of all patients with acute anterior myocardial infarction admitted to the emergency department, and is characterized by severe stenosis of the left anterior descending coronary artery (LAD). The ECG changes are not recognized by ECG software, and poor understanding of the syndrome among physicians may lead to misdiagnosis, delayed reperfusion, and mortality.Case presentationA 51-year-old male patient presented with a newly developed ECG pattern suggestive of de Winter Syndrome. Coronary angiography revealed anterior myocardial infarction. Based on the ECG and clinical manifestations, the patient was diagnosed with de Winter syndrome and underwent timely percutaneous coronary intervention to revascularize the left anterior descending artery (LAD). The patient showed good outcomes and no complications at 4 months after the operation.ConclusionsThis case highlights the importance of being aware of the possibility of de Winter syndrome in patients with symptoms of myocardial infarction but atypical ECG in order to conduct early revascularization and treatments.

Usefulness of whole blood viscosity estimated by de Simeone's formula to predict left ventricular thrombus formation within one year following acute anterior myocardial infarction.

Despite improvements in treatment of ST-segment myocardial infarction (STEMI), thrombus formation in the left ventricle is still a concerning complication that may lead to systemic thromboembolism and stroke. To evaluate the predictive value of estimated whole blood viscosity (WBV) for left ventricular thrombus development in patients surviving an acute anterior myocardial infarction (AAMI).MATERIALS \& METHODS:Seven hundred eighty AAMI patients who were treated percutaneously were enrolled consecutively. Serial echocardiographic examinations were performed within 24h of admission, before hospital discharge, and at 1, 3, 6 and 12 months following hospital discharge. WBV was calculated according to de Simones formula. One hundred patients (12.8%) developed thrombus formation within one year following AAMI. Patients with left ventricular thrombus (LVT) had significantly higher WBV values. Supramedian values of WBV at both low (0.5sec-1) and high (208sec-1) shear rates were found to be an independent predictor of LVT development. As an easily accessible parameter, WBV might be a useful predictor of LVT formation within one year following acute anterior myocardial infarction.

One-year outcomes of supersaturated oxygen therapy in acute anterior myocardial infarction: The IC-HOT study.

BackgroundSupersaturated oxygen (SSO2) has recently been approved by the U.S. Food and Drug Administration for administration after primary percutaneous coronary intervention (pPCI) in patients with anterior ST‐segment elevation myocardial infarction (STEMI) based on its demonstration of infarct size reduction in the IC‐HOT study.ObjectivesTo describe the 1‐year clinical outcomes of intracoronary SSO2 treatment after pPCI in patients with anterior STEMI.MethodsIC‐HOT was a prospective, open‐label, single‐arm study in which 100 patients without cardiogenic shock undergoing successful pPCI of an occluded left anterior descending coronary artery were treated with a 60‐min SSO2 infusion. One‐year clinical outcomes were compared with a propensity‐matched control group of similar patients with anterior STEMI enrolled in the INFUSE‐AMI trial.ResultsBaseline and postprocedural characteristics were similar in the two groups except for pre‐PCI thrombolysis in myocardial infarction 3 flow, which was less prevalent in patients treated with SSO2 (9.6% vs. 22.9%, p = .02). Treatment with SSO2 was associated with a lower 1‐year rate of the composite endpoint of all‐cause death or new‐onset heart failure (HF) or hospitalization for HF (0.0% vs. 12.3%, p = .001). All‐cause mortality, driven by cardiovascular mortality, and new‐onset HF or HF hospitalization were each individually lower in SSO2‐treated patients. There were no significant differences between groups in the 1‐year rates of reinfarction or clinically driven target vessel revascularization.ConclusionsInfusion of SSO2 following pPCI in patients with anterior STEMI was associated with improved 1‐year clinical outcomes including lower rates of death and new‐onset HF or HF hospitalizations.

Precordial ECG Lead Mispositioning: Its Incidence and Estimated Cost to Healthcare.

Background: The study was performed to estimate the incidence and economic burden of electrocardiogram (ECG) precordial lead mispositioning, in an effort to highlight the need for quality improvement. Lead mispositioning may result in further cardiovascular testing to rule out significant cardiac disease, thus adding to the national healthcare financial burden.Methods: All consecutive adult ECGs done during 2018, were reviewed. ECGs with acute anterior myocardial infarction (AMI), bundle branch blocks, left ventricular hypertrophy (LVH), left anterior fascicular block (LAFB), pre-excitation, left axis deviation, ventricular pacing and low voltage QRS were excluded. Septal infarcts identified automatically by the computerized software or identified manually using the criteria of QS composite in V2 were not excluded. Computer interpreted ECGs as “cannot rule-out anterior infarct” were also not excluded from this data. Reimbursement of various stress test types was used to estimate the cost burden of misdiagnosed ECGs.Results: A total of 9424 adult ECGs were evaluated. Poor R-wave progression (PRWP) or reversed R-wave progression (RRWP) accounted for 497 (5.27%) and 102 (1.08%) ECGs, respectively. A total of 335 septal infarct interpretations constituted about 3.55% of all ECGs. ECGs categorized as “cannot rule-out AMI” due to PRWP constituted about 0.89%. Therefore, a total of 1018 ECGs (10.8%) could be possibly falsely labelled as some type of myocardial infarction.Conclusion: Precordial ECG lead mispositioning can lead to significantly abnormal ECG patterns, leading to false diagnoses and further unnecessary cardiovascular testing. This not only increases risk and cost to the patient, but also adds to the national healthcare financial burden.

Acute anterior myocardial infarction complicated by takotsubo syndrome: the value of multimodality imaging.

Acute anterior myocardial infarction complicated by takotsubo syndrome: the value of multimodality imaging.

A study on occurrence of cardiovascular complications among adult patients with ST elevation anterior wall myocardial infarction in the presence or absence of reciprocal lead ECG changes

Acute anterior wall ST elevation MI with reciprocal lead changes are associated with more extensive ischemic area or larger infarction & more complications. The present research was thus conducted to study the occurrence of cardiovascular events in ST elevation anterior wall myocardial infarction in the presence or absence of reciprocal lead ECG changes.

Acute Anterior Myocardial Infarction in a Patient With Dextrocardia and Situs Inversus: An Unusual Coexistence

Situs inversus totalis is a rare disorder. In addition, acute coronary syndromes, especially ST-segment elevation myocardial infarctions, are rarely detected in this group. We demonstrate the electrocardiographic features and discuss the interventional challenges of acute anterior myocardial infarction in a patient with dextrocardia. (Level of Difficulty: Beginner.)

Quantitative Hybrid Cardiac [18F]FDG-PET-MRI Images for Assessment of Cardiac Repair by Preconditioned Cardiosphere-Derived Cells

Cardiosphere-derived cells (CDCs) are progenitor cells derived from heart tissue and have shown promising results in preclinical models. APOSEC, the secretome of irradiated peripheral blood mononuclear cells, has decreased infarct size in acute and chronic experimental myocardial infarction (MI). We enhanced the effect of CDCs with APOSEC preconditioning (apoCDC) and investigated the reparative effect in a translational pig model of reperfused MI. Supernatants of CDCs, assessed by proteomic analysis, revealed reduced production of extracellular matrix proteins after in vitro APOSEC preconditioning. In a porcine model of catheter-based reperfused anterior acute MI (AMI), CDCs with (apoCDC, n = 8) or without APOSEC preconditioning (CDC, n = 6) were infused intracoronary, 15 min after the start of reperfusion. Untreated AMI animals (n = 7) and sham procedures (n = 5) functioned as controls. 2-deoxy-2-(18 F)-fluoro-D-glucose-positron emission tomography-magnetic resonance imaging ([18F]FDG-PET-MRI), with late enhancement after 1 month, showed reduced scar volume and lower transmurality of the infarcted area in CDC and apoCDC compared to AMI controls. Segmental quantitative PET images displayed indicated more residual viability in apoCDC. The left-ventricle (LV) ejection fraction was improved nonsignificantly to 45.8% ± 8.6% for apoCDC and 43.5% ± 7.1% for CDCs compared to 38.5% ± 4.4% for untreated AMI. Quantitative hybrid [18F]FDG-PET-MRI demonstrated improved metabolic and functional recovery after CDC administration, whereas apoCDCs induced preservation of viability of the infarcted area.

Thrombolysis in Myocardial Infarction (TIMI) Risk Score Assessment for Complications in Acute Anterior Wall ST Elevation Myocardial Infarction

Introduction and objectiveEffective risk stratification is integral to the management of acute coronary syndromes. The Thrombolysis in Myocardial Infarction (TIMI) risk score for ST-segment elevation myocardial infarction (STEMI) is based on eight high-risk parameters that can be used at the bedside for risk stratification of patients presenting with STEMI. This study was designed to determine the frequency of cardiac complications of anterior wall STEMI assessed on TIMI risk score and to compare the rate of cardiac complications according to the TIMI score.Materials and methodsAn observational case series study was conducted in the Department of Cardiology at Sandeman Provincial Hospital in Quetta, Pakistan. The study duration was six months, from September 22, 2016 to March 23, 2017. A total of 369 patients were selected who had anterior wall myocardial infarction and received thrombolytic therapy, according to the inclusion and exclusion criteria. The TIMI score was calculated by proforma at the time of admission. Patients were divided into three groups: low-risk, moderate-risk, and high-risk TIMI groups. The frequency of complications of anterior wall myocardial infarction at the time of discharge was compared among these groups.ResultsThe study included 285 male patients (77.2%) and 84 (22.8%) female patients. A total of 174 (47.2%) patients were smokers, 79 (21.4%) were obese, and 93 (25.2%) had hyperlipidemia. Of the 369 patients, 205 (55.6%) were included in the low-risk group, 150 (40.7%) in the moderate-risk group, and 14 (3.8%) in the high-risk group. Post-myocardial infarction arrhythmias were noted in 33 (16.09%) patients in the low-risk group and six (4%) patients in the moderate-risk group. Left ventricular dysfunction was noted in 158 (77.07%) patients in the low-risk group, 78 (52%) patients in the moderate-risk group, and seven (50%) patients in the high-risk group. Cardiogenic shock occurred in seven (3.41%) patients in the low-risk group, 47 (31.33%) patients in the moderate-risk group, and 0 (0%) patient in the high-risk group. Death occurred in seven (3.41%) patients in the low-risk group, 19 (12.66%) patients in the moderate-risk group, and seven (50%) patients in the high-risk group.ConclusionTIMI scoring provides a better assessment in terms of complications caused by STEMI. The complications include the mechanical and electrophysiology of the heart.

Left Ventricular Sphericity Index is a reproducible bedside echocardiographic measure of geometric change between acute phase Takotsubo's syndrome and acute anterior myocardial infarction.

•TS and AMI are separate cardiac conditions with similar clinical presentations.•TS have a higher LVSI than AMI, indicating a more spherical left ventricle.•LVSI may be utilised acutely to assist differentiation of acute phase TS and AMI.

Persistent Myocardial Production of Follistatin-like 1 Is Associated With Left Ventricular Adverse Remodeling in Patients With Myocardial Infarction: Myocardial production of FSTL1 in AMI patients

BackgroundAlthough animal studies showed that Follistatin-like 1 (FSTL1) exerts cardioprotective effects against ischemic injury, little is known in humans. We examined whether FSTL1 is secreted in an infarcted myocardium and whether its production is associated with left ventricular (LV) remodeling in survivors of acute myocardial infarction. Methods and ResultsFSTL1 levels were measured by enzyme-linked immunosorbent assay in plasma collected from the aortic root and the anterior interventricular vein in 93 patients with anterior acute myocardial infarction. Measurement of FSTL1 levels and left ventriculography were repeated during the early phase (2 weeks) and the chronic phase (6 months) after MI. A persistent increment in FSTL1 levels from the aortic root to the anterior interventricular vein, reflecting FSTL1 production in the infarcted myocardium at both the early and chronic phases, was seen in 22 patients (24%). A linear regression analysis revealed that a persistent transmyocardial increment in FSTL1 levels was significantly associated with percent changes in LV end-diastolic volume index, LV end-systolic volume index, and LV ejection fraction from the early to the chronic phase (r = 0.44, 0.51, and −0.43, respectively, all P < .001). ConclusionsThe persistent production of FSTL1 in the infarcted myocardium was associated with adverse LV remodeling in survivors of acute myocardial infarction.

EVALUATION OF THE RELATION BETWEEN PLATELET COUNT AFTER PRIMARY PCI AND LEFT VENTRICULAR ANEURYSM IN PATIENTS WITH ACUTE ANTERIOR ST ELEVATION MYOCARDIAL INFARCTION

Objective: To evaluate the relationship between platelet count after primary percutaneous coronary intervention (p-PCI) and left ventricular aneurysm (LVA) in patients with acute anterior ST-elevation myocardial infarction(STEMI). Methodology: This descriptive study was performed on a population of patients with acute anterior STEMI, who had undergone p-PCI. Sampling was carried out by a consecutive survey of patients, who were admitted to the Medical Center in summer and fall of 2018. Blood samples were collected intravenously from all the patients at admission to the emergency department before and after p-PCI. Echocardiographic examinations were routinely performed by a specialist assistant as the co-author 8 to 12 hours after p-PCI and at follow-up (10 to 14 months after acute MI). The TIMI flow was observed immediately after p-PCI. In all the patients undergoing p-PCI, the location of left anterior descending (LAD) artery involvement during coronary arteries angiography was divided into three sections based on LAD artery length. Results: The mean WBC and PMN before p-PCI were statistically higher in the group of patients with LVA compared to individuals without LVA (p&lt;0.001). Based on multivariate analysis platelet count (OR=0.999, age (OR=1.07), PMN before P-PCI (OR=1.001) had a significant additive effect on the probability of LVA formation. Conclusion: Platelet count can be used for prediction of the risk of future LVA formation in acute STEMI patients. Key words: ST-segment elevation myocardial infarction; platelet count; mortality; percutaneous coronary intervention; left ventricular aneurysm

The Effects of Granulocyte Colony-Stimulating Factor in Patients with a Large Anterior Wall Acute Myocardial Infarction to Prevent Left Ventricular Remodeling: A 10-Year Follow-Up of the RIGENERA Study.

Background: the RIGENERA trial assessed the efficacy of granulocyte-colony stimulating factor (G-CSF) in the improvement of clinical outcomes in patients with severe acute myocardial infarction. However, there is no evidence available regarding the long-term safety and efficacy of this treatment. Methods: in order to evaluate the long-term effects on the incidence of major adverse events, on the symptom burden, on the quality of life and the mean life expectancy and on the left ventricular (LV) function, we performed a clinical and echocardiographic evaluation together with an assessment using the Minnesota Living with Heart Failure Questionnaire (MLHFQ) and the Seattle Heart Failure Model (SHFM) at 10-years follow-up, in the patients cohorts enrolled in the RIGENERA trial. Results: thirty-two patients were eligible for the prospective clinical and echocardiography analyses. A significant reduction in adverse LV remodeling was observed in G-CSF group compared to controls, 9% vs. 48% (p = 0.030). The New York Heart Association (NYHA) functional class was lower in G-CSF group vs. controls (p = 0.040), with lower burden of symptoms and higher quality of life (p = 0.049). The mean life expectancy was significantly higher in G-CSF group compared to controls (15 ± 4 years vs. 12 ± 4 years, p = 0.046. No difference was found in the incidence of major adverse events. Conclusions: this longest available follow-up on G-CSF treatment in patients with severe acute myocardial infarction (AMI) showed that this treatment was safe and associated with a reduction of adverse LV remodeling and higher quality of life, in comparison with standard-of-care treatment.

Relationship between fragmented QRS complexes and ejection fraction recovery in anterior ST-segment elevation myocardial infarction patients undergoing thrombolytic treatment.

Acute anterior ST-segment elevation myocardial infarction (STEMI) is a life-threatening disease. Adverse cardiac events of acute anterior STEMI include cardiovascular death or worsening congestive heart failure. This study investigated the role of fragmented QRS complex (fQRS) in predicting insufficient ejection fraction (EF) recovery in acute anterior STEMI. Patients with acute anterior STEMI who received thrombolytic therapy were prospectively enrolled in this study. Twelve-lead electrocardiography (ECG) was obtained from all patients during admission and 24 and 48 h after admission. We divided the patients into two groups according to the presence of fQRS appearance within 48 h: absence of fQRS in any lead (fQRS-), and its presence in two or more contiguous leads (fQRS+). All patients were evaluated with transthoracic echocardiography at admission, and at follow-up 6 and 12 months later. A total of 138 consecutive patients were included in the study. Seventy-three patients (52.9%) had fQRS in the ECG. EF recovery in the fQRS(+) group was significantly lower than that of the fQRS(-) group (39% vs. 43.9%, P < 0.001). Multiple logistic regression analysis showed that the fQRS (odds ratio: 4.147, 95% confidence interval: 1.607-10.697, P = 0.003) were an independent predictor of poor EF recovery. The presence of fQRS is an independent predictor for inadequate EF recovery in acute anterior STEMI patients undergoing thrombolytic treatment. Assessment of fQRS on surface ECG may be used in determining high-risk patients for poor EF recovery after acute anterior STEMI.

The “Better” Answer

The “Better” Answer

CRT-100.36 Predictors of Suboptimal Coronary Blood Flow After Primary Angioplasty and Its Implications on In-Hospital Clinical Outcomes in Patients With Acute Anterior Wall Myocardial Infarction

Suboptimal coronary blood flow after primary percutaneous coronary intervention (PCI) is a multifactorial complex phenomenon. Although extensively studied, defined modifiable risk factors and efficient management strategy are lacking. The aim of this study is to determine the potential causes of

Acute myocardial infarction, intraventricular thrombus and risk of systemic embolism.

The development of left ventricular thrombus (LVT) is a well-known and serious complication of acute myocardial infarction (AMI) due to the risk of systemic arterial embolism (SE), which is variable in its clinical picture and has potentially serious consequences depending on the extent of target organ damage. SE results in an increase in mortality and morbidity in these patients. LVT is one of the main causes of the development of ischaemic cardio-embolic cardiovascular events (CVE) after MI and the determination of the source of cardiac embolus is crucial for the initiation of adequate anticoagulant therapy in secondary prevention. Echocardiography holds an irreplaceable place in the diagnosis of LVT, contrast enhancement provides higher sensitivity. The gold standard for LVT diagnosis is cardiac magnetic resonance imaging, but it is not suitable as a basic screening test. In patients with already diagnosed LVT, it is necessary to adjust antithrombotic therapy by starting warfarin anticoagulation for at least 6 months with the need for echocardiographic follow-up to detect thrombotic residues. The effect of prophylactic administration of warfarin in high-risk patients after anterior AMI does not outweigh the risk of severe bleeding complications and does not result in a decrease in mortality and morbidity. At the present time, there is not enough evidence to use direct oral anticoagulants in this indication.

Biomarkers in patients with Takotsubo cardiomyopathy compared to patients with acute anterior ST-elevation myocardial infarction

Background: Takotsubo cardiomyopathy (TTC) is a syndrome of acute non-coronary heart failure with similar symptoms and electrocardiograms to acute anterior ST-elevation myocardial infarction (STEMI). Little is known about the pathophysiology of TTC. We assessed admission plasma concentrations of biomarkers reflecting neuroendocrine response (copeptin, mid-regional-pro-adrenomedullin, pro-atrial-natriuretic-peptide, soluble thrombomodulin (sTM), syndecan-1) and inflammation (suppression-of-tumorigenicity 2 (ST2), high-sensitive C-reactive-protein) in TTC patients and compared to patients with acute anterior STEMI.Materials and methods: Twenty TTC patients were matched with 40 STEMI patients by age, gender and left ventricular ejection fraction. Blood was sampled upon hospital admission immediately before acute coronary angiography.Results: The groups had similar comorbidities. TTC patients had higher plasma concentrations of sTM: 7.94 (5.89;9.61) vs. 6.42 (5.50;7.82)ng/ml, p = 0.04 and ST2 (53 (32;157) vs. 45 (31;55)ng/ml, p = 0.008) and higher heart rate: 101 (33) vs. 76(14)bpm, p = 0.0001, but lower concentrations of copeptin (10.4 (7.6;39) vs. 92.3 (13;197)pmol/l, p < 0.05) and troponin T (348 (98;759) vs. 1190 (261;4105)ng/l, p = 0.04).Conclusion: TTC patients had higher plasma concentrations of sTM and ST2, higher heart rate and lower copeptin and troponin T concentrations compared to acute anterior STEMI patients. This study contributes to the hypothesis that TTC patients have endothelial cell damage and are hemodynamically more stable than patients with acute anterior STEMI on admission.

Relationship between apical thrombus formation and blood viscosity in acute anterior myocardial infarction patients.

Aim: This study sought to investigate the predictive value of whole blood viscosity (WBV) to identify high-risk patients who will develop an apical thrombus during the acute phase of anterior transmural infarction. Materials & methods: Consecutive 1726 patients with first acute anterior myocardial infarction were evaluated. WBV was calculated according to the Simone's formula. Results: Patients with an apical thrombus had prolonged pain to balloon time, higher rate of post-PCI thrombolysis in myocardial infarction flow ≤1 and significantly higher mean WBV values at both shear rates than those without an apical thrombus. Conclusion: WBV values at both shear rates were found to be significant and independent predictors for early LV apical thrombus formation complicating a first-ever anterior wall myocardial infarction.