ST Elevation Acute Coronary Syndrome Research Articles

Abstract 16906: Impact of ECPELLA Support on Mid-Term Survival and IABP-Shock II Score in Patients With Refractory Cardiogenic Shock Due to Acute Coronary Syndrome

Introduction: The prognosis remains extremely poor for acute coronary syndrome (ACS) with cardiogenic shock (CS) who required VA-ECMO. The IABP-SHOCK II score is a simple tool, and has demonstrated a high predictive ability for assessing the prognosis of patients with CS. Objective: To evaluate the impact of ECPELLA on intermediate-term survival compared to VA-ECMO with IABP support in patients with ACS and refractory CS and to assess the utility of the IABP-SHOCK II score in predicting outcomes for patients requiring VA-ECMO support. Methods: From January 2012 to December 2022, we enrolled 90 consecutive patients with ACS-CS who received VA-ECMO. Patents were divided into two groups; 44 patients received ECPELLA, and 46 patients received VA-ECMO with IABP. We assessed IABP-SHOCK II score and 180-day all-cause mortality. Results: There were no significant differences in age, rate of male sex, coronary risk factors, ST-elevated ACS, LMT lesion, extracorporeal cardiopulmonary resuscitation, and IABP-SHOCK II score between two groups. Kaplan-Meier analysis revealed that ECPELLA was associated with a significantly higher 180-day survival rate (p = 0.001). The patients were categorized into three groups based on the IABP-SHOCK II score: low (0-2), intermediate (3-4), and high (5-9). The IABP-SHOCK II risk score successfully stratified only the ECPELLA group into different risk categories for 30-day prognostic assessment. Conclusions: ECPELLA was associated with favorable mid-term survival compared to VA-ECMO with IABP support. Additionally, the IABP-SHOCK II score proved to be a useful tool for predicting mortality in patients treated with ECPELLA.

2023 Guidelines on Coronary Artery Disease: At a Glance

The guidelines have been released in the recent ESC congress held in Amsterdam, Netherlands. The summary is in two headings, new recommendations and change of recommendations compared to the previous guidelines. The wording to use classes of recommendations— is recommended – Class I, should be considered – Class IIa, may be considered – Class IIb, not recommended – Class III. In this guidelines of ACS, both ST segment elevation myocardial infarction and non ST segment elevation acute coronary syndrome diagnosis, management are addressed combinedly rather than separately as done in previous guidelines.Figures emphasizing the importance of evaluation of symptoms, diagnosis, and management are the highlights of the guidelines. Example: At initial assessment think ACS − Abnormal ECG, Clinical context, Stable patient?

Comparison of heart, grace and TIMI scores to predict major adverse cardiac events from chest pain in a Spanish health care region

Acute non-traumatic chest pain (ANTCP) is the second cause of consultation in the Emergency department (ED). About 70% of all Acute Myocardial Infarctions present as non persistent ST-elevation acute coronary syndrome (NSTE-ACS) in the electrocardiogram. Our aim was to compare whether the HEART risk score is more effective than the GRACE and TIMI scores for the diagnosis and prognosis of Major Adverse Cardiac Events (MACE) at six weeks in patients with ANTCP and NSTE-ACS. A prospective cohort study was conducted with patients with ANTCP that attended an ED and a Primary Care Emergency Center (PCEC) from April 2018 to December 2020. The primary outcome was MACE at six weeks. Diagnostic performance was calculated for each scale as the Area under the Receiver Operating Characteristic (ROC) curve (AUC), sensitivity (SE), specificity (SP), and predictive values (PV). Qualitative variables were compared using the Chi-square test, and continuous variables were compared using the nonparametric Kruskal–Wallis test. We adjusted a logistic regression for risk groups, age, and gender to determine the effect of the HEART, GRACE, and TIMI scores on MACE. The degree of agreement (kappa index) was calculated in the categorical classification of patients according to the three risk scales. Cox proportional hazards regressions were performed for each scale and were compared using partial likelihood ratio tests for non-nested models. From a sample of 317 patients with ANTCP, 14.82% had MACE at six weeks. The AUC was 0.743 (95% CI 0.67–0.81) for the HEART score, 0.717 (95% CI 0.64–0.79) for the TIMI score, and 0.649 (95% CI 0.561–0.738) for the GRACE score. The HEART scale identified low-risk patients with a higher SE and negative PV than the GRACE and TIMI scores. The HEART scale was better than the GRACE and TIMI scores at diagnosing and predicting MACE at six weeks in patients with ANTCP and probable NSTE-ACS. It was also a reliable tool for risk stratification in low-risk patients. Its application is feasible in EDs and PCECs, avoiding the need for complementary tests and their associated costs without compromising patient health.

The CineECG in ischemia localization in ST-elevation (equivalent) acute coronary syndromes

Aim of the studyIn this proof of concept study we aimed to visualize and quantify the injury vectors using the CineECG in representative examples of ST elevation acute myocardial infarction (STEMI) and STEMI-equivalent electrocardiograms (ECG's). For this purpose ECG's were selected with different ST deviation patterns in acute anterior wall, inferior or posterolateral wall infarctions. MethodsThe ST-amplitudes of the individual leads were measured between J-point and 60 ms after the J-point. These data were used to compute the direction and size (i.e. ST-amplitudes) of the injury vectors of the respective STEMI (equivalent)’s and displayed in the frontal, transverse and sagittal view. The relative contribution of the ST vector was computed for each axis (X,Y,Z) and per view using the length of the projected ST vector on the respective plane. ResultsThe injury vectors accurately pointed to the area at risk in either proximal, mid or distal occlusions of the respective coronary arteries. Moreover in LCX occlusions, where no or small ST abnormalities in the standard ECG were present, the CineECG was found to be capable in pointing towards the ischemic area. Especially the visualization of the ST-vector in the sagittal plane was found to be contributing. ConclusionsThese findings suggest that the CineECG could become a useful additional tool to support the clinician. Moreover our preliminary findings suggest that CineECG may be more capable in detecting ischemic changes in situations where the ECG is not supportive, such as in LCX occlusions. Further studies in patient cohorts are needed to confirm these observations.

КАРДИОЛОГИЧЕСКАЯ СЛУЖБА ИРКУТСКОЙ ОБЛАСТИ – ИТОГИ 2022 ГОДА И НАПРАВЛЕНИЯ РАЗВИТИЯ

КАРДИОЛОГИЧЕСКАЯ СЛУЖБА ИРКУТСКОЙ ОБЛАСТИ – ИТОГИ 2022 ГОДА И НАПРАВЛЕНИЯ РАЗВИТИЯ

Increasing Incidence of ST-Elevation Acute Coronary Syndrome in Young South Asian Population, a Challenge for the World? An Assessment of Clinical and Angiographic Patterns and Hospital Course of Premature Acute Myocardial Infarction

The incidence of premature ischemic heart disease (IHD) is increasing because of urbanization, a sedentary lifestyle, and various other unexplored factors, especially in South Asia. This study aimed to assess the distribution of premature ST-elevation acute coronary syndrome (STE-ACS) with its clinical and angiographic pattern along with hospital course in a contemporary cohort of patients who underwent primary percutaneous intervention at a tertiary care center in the South Asian region. We included consecutive patients of either gender diagnosed with STE-ACS and who underwent primary percutaneous intervention. Patients were stratified based on age as ≤40years (young) and >40years (old). Clinical characteristics, angiographic patterns, and hospital course were compared between the 2 groups. Of the total of 4,686 patients, 466 (9.9%) were young (≤40years). Young patients had a lower prevalence of hypertension (40.8% vs 54.5%, p<0.001), diabetes (26.6% vs 36.4%, p<0.001), metabolic syndrome (14.8% vs 24%, p<0.001), history of IHD (5.8% vs 9.3%, p=0.013) and a higher frequency of smoking (33% vs 24.7%, p<0.001), positive family history (8.2% vs 3.2%, p<0.001), and single-vessel involvement (60.1% vs 33.2%, p<0.001). The composite adverse clinical outcome occurrence was significantly lower in young patients (14.2% vs 19.5%, p=0.006). On multivariable analysis, history of IHD in young, whereas age, Killip class III/IV, intubated, arrhythmias on arrival, diabetes, history of IHD, pre-procedure left ventricular end-diastolic pressure, ejection fraction <40%, and slow flow/no-reflow during the procedure were found to be the independent predictors of adverse clinical outcome in old patients. In conclusion, we have a substantial burden of premature STE-ACS, mostly in male patients potentially driven by smoking and positive family history. Despite favorable pathophysiology, with mostly single-vessel hospital courses of STE-ACS in the young equally lethal in nature.

Type of evidence supporting ACC/AHA and ESC clinical practice guidelines for acute coronary syndrome.

The aim of clinical practice guidelines for ST elevation myocardial infarction (STEMI) and non-ST elevation acute coronary syndrome (NSTE-ACS) is to assist healthcare professionals in clinical decision-making. We evaluated the type of studies supporting these guidelines and their recommendations. All references and recommendations in the 2013 and 2014 ACC/AHA and 2017 and 2020 (ESC clinical guidelines for STEMI and NSTE-ACS were reviewed. References were classified into meta-analyses, randomised, non-randomised, and other types (e.g., position papers, reviews). Recommendations were classified according to class and their level of evidence (LOE). We retrieved 2128 non-duplicated references: 8.4% were meta-analyses, 26.2% randomised studies, 44.7% non-randomised studies, and 20.7% 'other' papers. Meta-analyses were based on randomised data in 78% of cases and used individual-patient data in 20.2%. Compared to non-randomised studies, randomised studies were more frequently multicentre (85.5% vs. 65.5%) and international (58.2% vs. 28.5%). The type of studies supporting recommendations varied as per the LOE of the recommendation. For LOE-A recommendations, the breakdown of supporting recommendations was: 18.5% meta-analyses, 56.6% randomised studies, 16.6% non-randomised studies and 8.3% 'other' papers; for LOE-B this breakdown was 9%, 39.8%, 38.2%, and 12.9%; and for LOE-C; 4.6%, 19.3%, 30.3%, and 45.9%. The references supporting the ACC/AHA and ESC guidelines on STEMI and NSTE-ACS consisted of non-randomised studies in ~ 45% of cases, with less than a third of the references consisting of meta-analyses and randomised studies. The type of studies supporting guideline recommendations varied widely by the LOE of the recommendation.

Clinical symptoms and ECG data in women with acute coronary syndrome

Background. There are many differences in chest pain symptoms between men and women in terms of location, nature, and additional symptoms. The issue of describing the differences in chest pain in men and women with acute coronary syndrome (ACS), as well as their correlation with changes in the electrocardiogram (ECG) and coronary angiography (CAG) remains relevant.Methods. The study included 588 patients of the cardiology department of the Novokuznetsk City Clinical Hospital No. 1 from 2013 to 2017 with a diagnosis of ACS. Depending on the gender, the subjects were divided into two groups: Group I – 330 men; Group II – 258 women.Results. ACS with ST elevation was more common in men (45.8 %) than in women (33.3 %; p = 0.002). There were no pathological ECG changes in women in 58.1 % of cases, in men – in 45.5 % (p &lt; 0.001). ECG type Q/ST elevation was detected more often in men (45.8 %) than in women (33.3 %; p = 0.002). The absence of coronary artery lesions was observed in 27.9 % of men and 44.2 % of women (p &lt; 0.001). Hemodynamically significant coronary artery stenosis was more common in men (57.6 %) than in women (38.7 %; p &lt; 0.001). In a typical angina clinic, hemodynamically significant coronary artery disease in patients with Q/without ST elevation ACS was detected in 40.2 % of men and in 58.5 % of women (p = 0.002). In the atypical angina clinic, hemodynamically significant lesions of coronary artery were more common in men (40.6 %) than in women (34.1 %; p = 0.02).Conclusion. In women atypical chest pains and intact coronary arteries were detected more often than in men, and hemodynamically significant coronary artery stenosis were found less often than in men. In men, a more pronounced pathology of the coronary arteries in ACS was revealed, in women – great difficulties in diagnosing ACS.

Non-Obstructive Coronaries In Patients Presenting With The Non St-Elevation Acute Coronary Syndrome.

Worldwide, cardiovascular diseases are the major cause of mortality and morbidity with acute coronary syndrome as the most common clinical manifestation. In a typical clinical setup, around 30% of the patients presented with "ST-segment elevation myocardial infarction (STEMI)" caused by the complete occlusion of the coronary artery and the remaining 70% with intermittent or partial occlusion of the coronary termed as non-ST elevation The aim of this study was to assess the prevalence and characteristics of non-obstructive coronary arteries among patients presenting with non ST-elevation acute coronary syndrome (NSTE-ACS) at a tertiary care cardiac center of Karachi, Pakistan. This was a descriptive cross-sectional study, conducted at a tertiary care hospital in Karachi. Study inclusion criteria were patients of either gender admitted with NSTE-ACS and aged between 30-70 years. A routine coronary angiogram was performed in all the patients and the absence of ≥50% stenosis in any major epicardial vessel was taken in non-obstructive coronaries. A total of 174 patients (30-70 years) were included, of which 99 (56.9%) were male and the mean age was 59.43±11.24 years. In the distribution of socioeconomic status, 54 (31.0%) were lower class, middle class 81 (46.6%) while upper-class status were 39 (22.4%). Hypertension was observed in 76 (43.7%), chronic kidney disease in 20 (11.5%), and hyperlipidemia in 55 (31.6%). Non-obstructive coronary arteries were noted in 25 (14.4%) patients. It is to be concluded that non-obstructive coronary arteries are fairly prevalent in patients arriving in hospitals with NSTE-ACS in our population. Further research is needed to better understand the underlying pathophysiology and optimal management strategies for patients with NOCA in the setting of NSTEMI.

Association of mortality rates and availability of emergency and specialized, including high-tech, medical services for acute coronary syndrome in the Russian Federation

Aim. To study the impact of the availability of emergency and specialized, including high-tech, medical services for patients with acute coronary syndrome on mortality in Russia.Material and methods. We used the cointegration of time series characterizing mortality from acute coronary syndrome (ACS) and following parameters for the availability of emergency and specialized, including high-tech, care for ACS in Russia for the period from 2016 to 2021 according to the "Monitoring of interventions to reduce mortality from coronary artery disease": the proportion of ambulance visits for ACS with response time &lt;20 minutes; the proportion of patients with ST-elevation ACS (STE-ACS) hospitalized within 12 hours from symptom onset; proportion of patients with STE-ACS admitted to hospital within 2 hours of symptom onset; proportion of patients with ACS admitted to specialized departments; proportion of patients with STE-ACS with prehospital thrombolysis; proportion of patients with STE-ACS with thrombolysis; proportion of patients with STE-ACS who underwent percutaneous coronary intervention (PCI); proportion of patients with non-ST-elevation ACS (NSTE-ACS) who underwent PCI; the proportion of patients with STE-ACS admitted before 12 hours from the onset of symptoms who underwent PCI; proportion of patients with ACS who underwent coronary artery bypass grafting. To rank the availability indicators, the elasticity (E) coefficient was used, which characterizes the strength of the relationship between the factor and the result, which shows the change in the result value per 1% change in the factor.Results. According to contribution decrement to reducing mortality, the factors of health care availibility for patients with ACS-STE were arranged as follows (coefficient of elasticity and determination (R2) is indicated in brackets): "The proportion of patients with ACS-STE who underwent PCI" (E=1,5%; R2=0,60), "Proportion of patients with STE-ACS with prehospital thrombolysis" (E=1,1%; R2=0,91), "Proportion of patients with STE-ACS with thrombolysis" (E=1,0%; R2=0,96 ), "Proportion of patients with STE-ACS admitted before 12 h who underwent PCI" (E=0,9%; R2=0,94), "Proportion of patients with STE-ACS admitted to hospital before 12 h from the symptom onset" (E=0,5%; R2=0,97), "Proportion of patients with STE-ACS hospitalized &lt;2 hours from the symptom onset" (E=0,2%; R2=0,95). A significant resource in reducing mortality in ACS is the reduction in ambulance response time in ACS (E=2,3%; R2=0,87) and compliance with specialized hospitalization of patients with ACS (E=1,8%; R2=0,73), but in reducing mortality in NSTE-ACS, the proportion of patients with NSTE-ACS who underwent PCI (E=1,7%; R2=0,72).Conclusion. An analysis of the impact of the availability of emergency and specialized, including high-tech, medical services for patients with ACS in Russia showed that the greatest contribution to mortality reduction in STE-ACS is made by time reduction in PCI and an increase in the use of thrombolytic therapy, mainly at the prehospital stage, in NSTE-ACS — an increase in the number of PCIs, and in ACS in general, strict compliance with specialized hospitalization of patients and a reduction in ambulance response time in ACS.

Treatment adherence in patients without ST-elevation acute coronary syndrome.

Despite progress during the last decades, patients with coronary artery disease (CAD) remain with a high residual risk due to multiple reasons. Optimal medical treatment (OMT) provides a decrease of recurrent ischemic events after acute coronary syndrome (ACS). Therefore, treatment adherence results crucial to reduce further outcomes after the index event. No recent data are available in Argentinian population; the main objective of our study was to evaluate the adherence at 6 and 15 months in post non-ST elevation acute coronary syndrome (NST-ACS) consecutive patients. Secondary objective was to evaluate the relationship of adherence with 15-month events. A prespecified sub-analysis in the prospective registry Buenos Aires I was performed. The adherence was evaluated using the modified Morisky-Green Scale. A number of 872 patients had information about adherence profile. Of them 76.4% were classified as adherents at month 6 and 83.6% at 15 (P=0.06). We did not find any difference in baseline characteristic between the adherent and non-adherent patients at 6 months. The adjusted analysis showed that non-adherent patients had a rate of ischemic events at 15th month of 20% (27/135) vs. 11.5% (52/452) in adherent patients (P=0.001). The bleeding events defined were of 3.6% in the non-adherent group vs. 5% in the adherent group without a statistical difference (P=0.238). Adherence to treatment is still a major issue as almost 25% of patients should be considered as non-adherent to OMT. No clinical predictor of this phenomenon was identified but our criteria were not exhaustive. Good adherence to treatment was highly associated to a reduction of ischemic events, whereas no impact on bleeding events was found. These data support a better network and collaboration with shared decision between healthcare professionals with patients and family members to improve acceptance and adherence to optimal medical strategies.

A systematic assessment of the characteristics of randomized controlled trials cited by acute coronary syndrome clinical practice guidelines.

The aim of this study was to describe the methodological features of the randomized controlled trials (RCTs) cited in American and European clinical practice guidelines (CPGs) for ST elevation myocardial infarction (STEMI) and non-ST elevation acute coronary syndrome (NSTE-ACS). Out of 2128 non-duplicated references cited in the 2013 and 2014 American College of Cardiology/American Heart Association and 2017 and 2020 European Society of Cardiology CPGs for STEMI and NSTE-ACS, we extracted data for 407 RCTs (19.1% of total references). The majority were multicenter studies (81.8%), evaluated pharmacological interventions (63.1%), had a 2-arm (82.6%), and superiority (90.4%) design. Most RCTs (60.2%) had an active comparator, and 46.2% were funded by industry. The median observed sample size was 1001 patients (84.2% of RCTs achieved≥80% of the intended sample size). Most RCTs had a single primary outcome (90.9%), which was a composite in just over half (51.9%). Among the RCTs testing for superiority, 44.0% reported a P-value of≥0.05 for the primary outcome and 61.9% observed a risk reduction of>15%. The observed treatment effect was lower-than-expected in 67.6% of RCTs, with 34.4% having at least a 20% lower-than-expected treatment effect. The calculated post hoc statistical power was≥80% for 33.9% of cited RCTs. This analysis demonstrates that RCTs cited by CPGs can still have significant methodological issues and limitations, highlighting that a better understanding of the methodological aspects of RCTs is crucial in order to formulate recommendations relevant to clinical practice.

Obesity paradox: a myth or reality, time to reveal the fact in a South Asian cohort presenting with STE-ACS undergoing primary percutaneous coronary intervention

ObjectivesObesity is a globally well-established risk factor for atherosclerotic cardiovascular diseases; however, some studies have witnessed survival benefits among obese patients and this phenomenon is termed ‘the obesity paradox’. Our...

Risk Stratification of Acute-Onset Chest Pain: SVEAT Score Versus HEART and TIMI Scores.

Introduction Acute chest pain is a frequently encountered symptom in the emergency department. Despite the availability of various chest pain risk scores, their effectiveness in identifying low-risk patients suitable for safe and early discharge is inadequate. Moreover, clinical data collected at the initial stage, which has valuable discriminatory ability, is often underutilized. This study aims to assess the effectiveness of the Symptoms, history of Vascular disease, ECG, Age, and Troponin I (SVEAT) score in predicting major adverse cardiovascular events (MACE) in acute-onset chest pain, compared with the pre-existing History, ECG, Age, Risk factors, and Troponin I (HEART) and Thrombolysis In Myocardial Infarction (TIMI) scores. Methodology This prospective study utilizing non-probability convenience sampling was conducted in the emergency medicine department of a tertiary care hospital in Rawalpindi,Pakistan, for a period of five months from July 2022 to November 2022. The study included patients aged >45 years who presented primarily with chest pain lasting for at least five minutes but less than 24 hours and with a lack of acute ECG changes indicative of ST-elevation acute coronary syndrome (STE-ACS). Patients who were hemodynamically unstable were excluded. All patients were assessed for the calculation of SVEAT, TIMI, and HEART scores. All patients were followed for a period of 30 days to assess the incidence of MACE. Results A total of 60 patients were included. The mean age was 61.5±9.1 years while 31 (51.7%) patients were females. Diabetes was the most prevalent comorbidity (n=32; 53.3%). Regarding MACE, nine (15%) patients developed ACS and underwent percutaneous coronary intervention (PCI). Two patients (3.3%) experienced heart failure. Six (10%) patients also underwent PCI in the absence of ACS while two (3.3%) patients developed sudden cardiac death. Area-under-curve (AUC) values were determined for SVEAT (0.843; 95%CI: 0.74-0.94), TIMI (0.742; 95%CI: 0.62-0.86), and HEART scores (0.840; 95%CI: 0.74-0.94). A cut-off level of 3.5 SVEAT points obtained a sensitivity of 63.2% and specificity of 75.6% in predicting 30-day MACE. Conclusion SVEAT score potentially lacks the appropriate sensitivity level to predict a significant number of major adverse cardiovascular events compared to contemporary risk stratification scores. Therefore, the SVEAT criteria need re-evaluation as a screening tool for risk assessment in acute chest pain.

Cardiac rehabilitation can change the destiny of the patient with ST-elevation acute coronary syndrome

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Cardiac rehabilitation (CR) has become a basic element in the recovery of patients with acute coronary syndrome, since it achieves greater therapeutic adherence and better control of cardiovascular risk factors. Purpose We aim to describe the characteristics of patients with ST-elevation acute coronary syndrome (STEACS) included in a Cardiac rehabilitation program, as well as the achievement of prevention objectives and the occurrence of mayor adverse cardiovascular events (MACE). Methods Observational prospective study where a total of 664 STEMI patients admitted to a Coronary Unit during the years 2017-2020 were included. They were classified according to their participation in a CR program. We compared medical history, lipid-lowering treatment (prior, at discharge and titration), lipid levels at discharge and at 1-year follow-up, and degree of achievement of lipid targets. MACE (mortality, reinfarction, coronary revascularisation and restenosis) were observed at 2-year follow-up. Results From 664 patients, 351 were excluded due to lack of follow-up or early mortality. From a total of 313 patients (mean age 59.9±11.2 years; 81% male), 55.3% were included in the CR program. This group had a lower mean age (55.46±8.7 vs 65.39±11.5, P&amp;lt;0.001), as well as a higher frequency of early ischaemic heart disease history and smoking, with a lower frequency of hypertension and diabetes (Table). Lipid-lowering treatment at discharge was similar in both groups. In patients undergoing CR, there was a lower level of total cholesterol and low-density lipoprotein cholesterol (LDLc) at one year follow-up (126.2±27 vs 137.2±34, P=0.002; 57.8±23 vs 67.5±26, P&amp;lt;0.001) and a greater reduction in LDLc (41.4% vs 20.86%, P&amp;lt;0.001) was achieved even from higher initial LDLc values. Titration of lipid-lowering treatment was also greater, with the old target of LDLc&amp;lt;70 being achieved in a greater number of cases (81.5% vs 59.3%, P&amp;lt;0.001). At 1-year follow-up, the new lipid reduction target (LDLc&amp;lt;55 + 50% reduction) was achieved in only 26.8% of patients, with a greater reduction in the CR group (34.1% vs 17.9%; P=0.02). Although differences were observed in the follow-up in terms of mortality and new events, in favor of the CR group, these did not reach statistical significance. Conclusions Participation in a CR program is associated with better lipid control in patients admitted for STEACS. These programmes represent a basic tool for achieving lipid and cardiovascular risk factor targets and improved long-term clinical outcomes.

Coronary angiographic profile in non ST elevation acute coronary syndrome: risk stratification and management strategy

Abstract Funding Acknowledgements Type of funding sources: None. Background It has been reported that risk scores like GRACE and TIMI scores in NSTE-ACS are associated with more complex coronary anatomy and predict worse outcomes. No data from Iraq regarding how these scores reflect severity of coronary obstruction. Purpose We aimed to investigate how obstructive coronary lesions are related to GRACE or TIMI risk class in NSTE-ACS. Methods Patients with NSTE-ACS were prospectively recruited and stratified according to TIMI and GRACE risk scores into high, intermediate and low classes. Their coronary angiography findings were recorded, and results classified accordingly into: Normal coronaries, non-critical coronary lesion&amp;lt;70% and critical coronary lesion (obstruction≥70% of coronary artery). Results n=150, among whom 65.33% were referred for coronary catheterization. For patients catheterized within 2 hours: 20% have normal coronary angiography (all in lower risk category), 80 % have obstructive coronary lesions. Moreover, those who were catheterized within&amp;gt;24 hours were 74 patients, among whom; 16.21 % had normal coronary angiography and 81.08% had obstructive (Critical) coronary lesions. However, there was no statistical significance for types of coronary lesions considering timing to intervention or risk category. In 29.59% of those who were referred for catheterization, they had PCI at same session and 29.59% had been referred for CABG. Patients with higher GRACE scores were more frequent to be referred for CABG. Conversely, on classifying patients according to TIMI score, those with intermediate TIMI scores were more to be referred for CABG. Conclusions Higher TIMI and GRACE scores were associated with more significant angiographic coronary lesions and with more referral for CABG than lower risk patients. This finding supports the importance of referring higher risk patients for catheterization according to guideline recommendation especially in resource-limited settings in Iraq where proper risk stratification is crucial to choose those who will benefit the most from invasive strategy.

Data Modeling Using Vital Sign Dynamics for In-hospital Mortality Classification in Patients with Acute Coronary Syndrome.

This study compared feature selection by machine learning or expert recommendation in the performance of classification models for in-hospital mortality among patients with acute coronary syndrome (ACS) who underwent percutaneous coronary intervention (PCI). A dataset of 1,123 patients with ACS who underwent PCI was analyzed. After assigning 80% of instances to the training set through random splitting, we performed feature scaling and resampling with the synthetic minority over-sampling technique and Tomek link method. We compared two feature selection. recursive feature elimination with cross-validation (RFECV) and selection by interventional cardiologists. We used five simple models: support vector machine (SVM), random forest, decision tree, logistic regression, and artificial neural network. The performance metrics were accuracy, recall, and the false-negative rate, measured with 10-fold cross-validation in the training set and validated in the test set. Patients' mean age was 66.22 ± 12.88 years, and 33.63% had ST-elevation ACS. Fifteen of 34 features were selected as important with the RFECV method, while the experts chose 11 features. All models with feature selection by RFECV had higher accuracy than the models with expert-chosen features. In the training set, the random forest model had the highest accuracy (0.96 ± 0.01) and recall (0.97 ± 0.02). After validation in the test set, the SVM model displayed the highest accuracy (0.81) and a recall of 0.61. Models with feature selection by RFECV had higher accuracy than those with feature selection by experts in identifying patients with ACS at high risk for in-hospital mortality.

Clinical Decision Pathway for the Use of Fondaparinux in the Management of Acute Coronary Syndrome (ACS) in Hospitals with and Without Catheter Laboratories: An Expert Opinion from India.

The current recommendations by Indian experts who are focused on the challenges in the management of patients with acute coronary syndrome (ACS) in rural areas, due to limited catheterization (CATH) lab facilities and interventional cardiologist coverage across the country, are described. 120 cardiologist experts drafted recommendations during ten advisory board meetings conducted from April to May 2022. Experts framed statements based on experience, collective clinical judgment from practical experience, and available scientific evidence regarding ACS. The consensus positioned fondaparinux as highly useful in non-CATH-lab-based hospitals for patients diagnosed with non-ST elevation acute coronary syndrome (NSTE-ACS) and ST elevation acute coronary syndrome (STE-ACS) patients who cannot be shifted to percutaneous coronary intervention (PCI)-capable centres, or for patients who are thrombolysed at peripheral centres.

Real-life evaluation of hypersensitive I-troponin on a point-of care analyser in an emergency unit

European Society of Cardiology (ESC) guidelines allow to perform rapid rule-in and rule-out algorithm with rapid troponin kinetics for the management of suspected Non ST-elevation acute coronary syndrome. These recommendations allow the use of point-of-care testing (POCT) systems provided that they have sufficient analytical performance. The aim of our study was to evaluate in real life the feasibility and performance of using a high sensitivity cardiac troponin I POCT system assay (hs-cTnI, Atellica® VTLi, Siemens) compared to high sensitivity cardiac troponin T values (hs-cTnT, e602®, Roche) obtained for patients admitted to emergency department. Analytical verification showed a coefficient of variation below 10% for hs-cTnI. Comparison of both troponins was moderate (r=0.7). The study included 117 patients with a median age of 65 years, 30% had renal failure and 36% presented with chest pain. In this study, the hs-cTnT value was, more often, higher than the 99th percentile than the hs-cTnl value, even for an age-adjusted 99th percentile hs-cTnT value. The concordance of the results was moderate (Cohen's Kappa: 0.54), age remaining the most important explanatory value of discordance. Only hs-cTnT had a predictive value for hospitalization. We did not observe any interpretation discrepancies for patients who had troponin kinetics. This study confirms the feasibility of using a POCT analyzer in the emergency department, provided that it performs high sensitivity troponin. However, some data are missing to be able to use it in the framework of rapid algorithm. Finally, the implementation of POCT requires collaboration between biologists and emergency physicians in terms of organization and interpretation of values, for the overall benefit of the patient.

COMPARISON OF GRACE (GLOBAL REGISTRY OF ACUTE CORONARY EVENTS) SCORE AND SERUM NT- pro BNP LEVEL IN PREDICTING 30 DAY MORTALITY IN PATIENTS WITH NON- ST- SEGMENT ELEVATION ACUTE CORONARY SYNDROME (NSTE-ACS) ATTENDING EMERGENCY DEPARTMENT.

Coronary Artery Disease (CAD) is the single most frequent cause of death worldwide. More than seven million people die from CAD every year, accounting for 12.8% of all deaths. Acute coronary syndrome (ACS) is a potentially life-threatening manifestation of CAD where time is crucial in initial management. Patients with ACS are divided into two groups to facilitate evaluation and management namely acute myocardial infarction (MI) with ST segment elevation (STEMI) on their presenting electrocardiogram(ECG) and those with non ST segment elevation acute coronary syndrome (NSTE-ACS) or non ST segment elevation myocardial infarct ion (NSTEMI).The incidence of NSTEMI is rising due to the increasing burden of obesity , chronic kidney disease and increasing detection of myocardial necrosis by raised hsTrop I (high sensitive Troponin I). We aimed to explore the utility of biomarker like serum NT-pro BNP level with the Global Registry of Acute Coronary Events (GRACE) risk calculationin patients presenting with non-ST-elevation acute coronary syndromes (NSTE-ACS) .A total no 33 patients were included in this study. From the comparison of GRACE SCORE and serum NT-proBNP, the difference in 30 day mortality in patients with NSTE-ACS it had been observed that based on optimal cut off from ROC curve ,the area under the curve(AUC) for GRACE score and serum NT-proBNPwere 99 vs 89.7 with a sensitivity and specicity of 98% vs 92.86%, 94.74% vs 73.68% respectively.