Killip Class Research Articles

Benefit of prehospital electrocardiogram on door-to-device time in ST-segment elevation myocardial infarction with cardiogenic shock: Data from the Kanagawa Acute Cardiovascular Registry

BackgroundThe benefit of prehospital 12‑lead electrocardiogram (PH-ECG) performed by emergency medical service personnel at the site of first medical contact (FMC) in patients with ST-segment elevation myocardial infarction (STEMI) with cardiogenic shock (CS-STEMI) remains unclear. This study aimed to investigate the effect of PH-ECG on door-to-device time in patients with CS-STEMI. MethodsThis study enrolled CS-STEMI (Killip class IV) patients who were transferred directly to hospitals by ambulance (n = 517) from the Kanagawa Acute Cardiovascular Registry database. Patients were divided into PH-ECG (+) (n = 270) and PH-ECG (−) (n = 247) groups. Patients who experienced out-of-hospital cardiac arrest, who did not undergo emergent coronary intervention, or whose data were missing were excluded. Patient characteristics, FMC-to-door time, door-to-device time, and in-hospital mortality were compared between the groups. ResultsThe patient backgrounds of the PH-ECG (+) and PH-ECG (−) groups were comparable. The peak creatinine kinase level was greater in the PH-ECG (+) group than in the PH-ECG (−) group [2756 (1292–6009) IU/ml vs. 2270 (957–5258) IU/ml, p = 0.048]. The FMC-to-door time was similar between the two groups [25 (20−33) min vs. 27 (20–35) min, p = 0.530], while the door-to-device time was significantly shorter in the PH-ECG group [74 (52–103) min vs. 83 (62–111) min, p = 0.007]. In-hospital mortality did not differ between the two groups (18 % vs. 21 %, p = 0.405). Multivariable logistic regression analyses revealed that PH-ECG (+) was independently associated with a door-to-device time < 60 min [odds ratio (95 % confidence intervals): 1.88 (1.24–2.83), p = 0.003]. ConclusionsPH-ECG was significantly associated with shorter door-to-device times in patients with CS-STEMI. Further studies with larger populations and more defined protocols are required to evaluate the utility of PH-ECG in patients with CS-STEMI.

Relationship Between CHA₂DS₂-VASc Score on Admission and In-Hospital Major Adverse Cardiovascular Events in Patients Diagnosed With ST-Elevation Myocardial Infarction.

The CHA₂DS₂-VASc (congestive heart failure, hypertension, age, diabetes mellitus, stroke, vascular disease, sex) scoring system, which includes conventional risk factors of coronary artery disease, was originally created to quantify the risk of thromboembolism in patients with atrial fibrillation. This study evaluated the usefulness of this score to predict adverse outcomes in STEMI (ST-elevation myocardial infarction) patients without atrial fibrillation. Primary end points were identified as MACE (major adverse cardiovascular events) which included in-hospital death or cerebrovascular accident. MACE rate was 10% (193 patients). The CHA₂DS₂-VASc score was an independent predictor of MACE (95% CI, 2.31 [1.37-3.9]; P = .0016). Other independent predictors of MACE included heart rate (95% CI, 1.56 [0.97-2.50]; P = .0242), admission Killip class (95% CI, 24.19 [10.74-54.46]; P < .0001), admission creatinine level (95% CI, 1.54 [1.10-2.16]; P = .0024), peak CK-MB level (95% CI, 1.63 [0.98-2.70]; P = .0001), and no-reflow (95% CI, 2.45 [1.25-4.80]; P = .0085). A nomogram was developed to estimate the risk of in-hospital adverse outcomes for STEMI patients. The CHA₂DS₂-VASc score was an independent predictor of MACE in STEMI patients. Linear analysis of CHA₂DS₂-VASc score without dichotomization was the main difference of this study from others.

Clinical profile and risk factors of patients presenting with acute myocardial infarction at RIMS, Imphal

Background: Cardiovascular diseases are the leading cause of mortality in India. Ischemic heart disease is a result of an inadequate supply of blood to a portion of the myocardium caused by atherosclerotic disease of an epicardial coronary artery. The increasing incidence of myocardial infarction (MI) and associated mortality is a concern. Aims and Objectives: The aims and objectives of the study were to evaluate the clinical profile and determine the association of risk factors in patients presenting with acute MI. The study highlights the trend of occurrence of acute MI so as appropriate measures can be taken to mitigate the incidence of coronary artery disease (CAD). Materials and Methods: A cross-sectional study was conducted among 100 patients with acute MI admitted to the intensive coronary care unit and medicine wards of a tertiary center in North-East India. The study was carried out for a period of 2 years from September 2019 to August 2021. Results: The mean age of the study population was 63.13±10.47 years, with an age range from 41 to 90 years. The study population had 75% males and 25% females. The most common presenting symptom was chest pain in 96% of patients. Hypertension in 75% of patients was the most common risk factor studied. About 97% of patients had at least one cardinal risk factor for MI. Inferior wall MI in 47% of patients was the most common site of MI. The highest mortality was seen in those who presented with Killip Class IV. Conclusions: Increasing age and male gender predisposed to MI. The association of risk factors such as hypertension, diabetes, obesity, and family history was higher in females. To bring about a reduction in the risk of CAD, emphasis should be laid on the adoption of a healthy lifestyle particularly for those at risk of CAD.

A Machine Learning Model for Predicting In-Hospital Mortality in Chinese Patients With ST-Segment Elevation Myocardial Infarction: Findings From the China Myocardial Infarction Registry.

Machine learning (ML) risk prediction models, although much more accurate than traditional statistical methods, are inconvenient to use in clinical practice due to their nontransparency and requirement of a large number of input variables. We aimed to develop a precise, explainable, and flexible ML model to predict the risk of in-hospital mortality in patients with ST-segment elevation myocardial infarction (STEMI). This study recruited 18,744 patients enrolled in the 2013 China Acute Myocardial Infarction (CAMI) registry and 12,018 patients from the China Patient-Centered Evaluative Assessment of Cardiac Events (PEACE)-Retrospective Acute Myocardial Infarction Study. The Extreme Gradient Boosting (XGBoost) model was derived from 9616 patients in the CAMI registry (2014, 89 variables) with 5-fold cross-validation and validated on both the 9125 patients in the CAMI registry (89 variables) and the independent China PEACE cohort (10 variables). The Shapley Additive Explanations (SHAP) approach was employed to interpret the complex relationships embedded in the proposed model. In the XGBoost model for predicting all-cause in-hospital mortality, the variables with the top 8 most important scores were age, left ventricular ejection fraction, Killip class, heart rate, creatinine, blood glucose, white blood cell count, and use of angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs). The area under the curve (AUC) on the CAMI validation set was 0.896 (95% CI 0.884-0.909), significantly higher than the previous models. The AUC for the Global Registry of Acute Coronary Events (GRACE) model was 0.809 (95% CI 0.790-0.828), and for the TIMI model, it was 0.782 (95% CI 0.763-0.800). Despite the China PEACE validation set only having 10 available variables, the AUC reached 0.840 (0.829-0.852), showing a substantial improvement to the GRACE (0.762, 95% CI 0.748-0.776) and TIMI (0.789, 95% CI 0.776-0.803) scores. Several novel and nonlinear relationships were discovered between patients' characteristics and in-hospital mortality, including a U-shape pattern of high-density lipoprotein cholesterol (HDL-C). The proposed ML risk prediction model was highly accurate in predicting in-hospital mortality. Its flexible and explainable characteristics make the model convenient to use in clinical practice and could help guide patient management. ClinicalTrials.gov NCT01874691; https://clinicaltrials.gov/study/NCT01874691.

Presentation, management, and early outcomes of young acute coronary syndrome patients- analysis of 23,560 South Asian patients from 2012 to 2021

BackgroundThere is dearth of literature addressing early outcomes of acute coronary syndrome (ACS) among young patients, particularly South Asians descent who are predisposed to premature coronary artery disease (CAD). Therefore, we compared presentation, management, and early outcomes of young vs. old ACS patients and explored predictors of in-hospital mortality.MethodsWe extracted data of 23,560 ACS patients who presented at Tabba Heart Institute, Karachi, Pakistan, from July 2012-June 2020, from the Chest pain-MI-Registry™. We categorized data into young ≤ 45 and old ACS patients > 45 years. Chi-sq/Fischer exact tests were used to assess the difference between presentation, disease management, and in-hospital mortality between both groups. Logistic regression was used to determine odds ratio along with 95% confidence interval of factors associated with early mortality.ResultsThe younger patients were 12.2% and women 23.5%. The prevalence of dyslipidemia (34.5% vs. 22.4%), diabetes (52.1% vs. 27.4%), and hypertension (68.3% vs. 42.9%) was higher in older patients. Family history of premature CAD (18.1% vs. 32.7%), smoking (40.0% vs. 22.9%), and smokeless tobacco use (6.5% vs. 8.4%) were lower in older patients compared to younger ones. Younger patients were more likely to present with STEMI (33.2% vs. 45%). The median symptom-to-door time was 125 min longer (p-value < 0.01) in the young patients compared to the older age group. In-hospital mortality (4.3% vs. 1.7%), cardiac arrest (1.9% vs. 0.7%), cardiogenic shock (1.9% vs. 0.9%), and heart failure (1% vs. 0.6%) were more common in older patients. After adjusting for other factors, younger age (AOR 0.6, 95% CI 1.5–3.7) had significantly lesser odds of in-hospital mortality. Other factors associated with early mortality included women, family history of premature CAD, STEMI, Killip class III and IV, coronary angiography, revascularization, CABG, and use of aspirin and beta blockers within the first 24 h.ConclusionWe found every tenth ACS patient was younger than 45 years of age despite a lesser number of comorbidities such as hypertension and diabetes. Overall, the in-hospital prognosis of young patients was more favorable than that of older patients. The study emphasizes the need for tailored primary prevention programs for ACS, considering the varying risks among different age groups.

Prevalence and prognostic implications of the no-reflux phenomenon in patients undergoing primary percutaneous coronary intervention at a university center in a middle-income country.

To analyze the prevalence of no-reflow and the 30-day mortality in a university center in a middle-income country. We analyzed 2463 patients who underwent primary PCI from January 2006 to December 2021. The outcome measure was 30-day mortality. Of a total of 2463 patients, no-reflow phenomenon was found in 413 (16.8%) patients, 30-day mortality was 16.7 vs. 4.29% (p < 0.001). Patients with no-reflow were older 60 (53-69.5) vs. 59 (51-66) (p = 0.001), with a higher delay in onset of symptom to emergency department arrival 270 vs. 247 min (p = 0.001). No-reflow patients also had had fewer previous myocardial infarction, 11.6 vs. 18.4 (p = 0.001) and a Killip class > 1, 37 vs. 26% (p < 0.001). No-reflow patients were more likely to have an anterior myocardial infarction (55.4 vs. 47.8%; p = 0.005) and initial TIMI flow 0 (76 vs. 68%; p < 0.001). No-reflow occurred in 16.8% of STEMI patients undergoing primary PCI and was more likely with older age, delayed presentation, anterior myocardial infarction and Killip class > 1. No-reflow was associated with a higher mortality at 30-day follow-up.

Importance of hospital and clinical factors for early mortality in Takotsubo syndrome: Insights from the Swedish Coronary Angiography and Angioplasty Registry

BackgroundTakotsubo syndrome (TTS) is an acute heart failure syndrome with symptoms similar to acute myocardial infarction. TTS is often triggered by acute emotional or physical stress and is a significant cause of morbidity and mortality. Predictors of mortality in patients with TS are not well understood, and there is a need to identify high-risk patients and tailor treatment accordingly. This study aimed to assess the importance of various clinical factors in predicting 30-day mortality in TTS patients using a machine learning algorithm.MethodsWe analyzed data from the nationwide Swedish Coronary Angiography and Angioplasty Registry (SCAAR) for all patients with TTS in Sweden between 2015 and 2022. Gradient boosting was used to assess the relative importance of variables in predicting 30-day mortality in TTS patients.ResultsOf 3,180 patients hospitalized with TTS, 76.0% were women. The median age was 71.0 years (interquartile range 62–77). The crude all-cause mortality rate was 3.2% at 30 days. Machine learning algorithms by gradient boosting identified treating hospitals as the most important predictor of 30-day mortality. This factor was followed in significance by the clinical indication for angiography, creatinine level, Killip class, and age. Other less important factors included weight, height, and certain medical conditions such as hyperlipidemia and smoking status.ConclusionsUsing machine learning with gradient boosting, we analyzed all Swedish patients diagnosed with TTS over seven years and found that the treating hospital was the most significant predictor of 30-day mortality.

Early Invasive Strategy for Octogenarians and Nonagenarians With Acute Myocardial Infarction.

Background: Older adults with acute myocardial infarction (AMI) are currently a rapidly growing population. However, their clinical presentation and outcomes remain unresolved. Methods and Results: A total of 268 consecutive AMI patients were analyzed for clinical characteristics and outcomes with major adverse cardiovascular events (MACE) and all-cause mortality within 1 year. Patients aged ≥80 years (Over-80; n=100) were compared with those aged ≤79 years (Under-79; n=168). (1) Primary percutaneous coronary intervention (PCI) was frequently and similarly performed in both the Over-80 group and the Under-79 group (86% vs. 89%; P=0.52). (2) Killip class III-IV (P<0.01), in-hospital mortality (P<0.01), MACE (P=0.03) and all-cause mortality (P<0.01) were more prevalent in the Over-80 group than in the Under-79 group. (3) In the Over-80 group, frail patients showed a significantly worse clinical outcome compared with non-frail patients. (4) Multivariate analysis revealed Killip class III-IV was associated with MACE (odds ratio [OR]=3.51; P=0.02) and all-cause mortality (OR=9.49; P<0.01) in the Over-80 group. PCI was inversely associated with all-cause mortality (OR=0.13; P=0.02) in the Over-80 group. Conclusions: The rate of primary PCI did not decline with age. Although octogenarians/nonagenarians showed more severe clinical presentation and worse short-term outcomes compared with younger patients, particularly in those with frailty, the prognosis may be improved by early invasive strategy even in these very old patients.

Prognostic Value of Systemic Arterial Lactate Levels in Patients with ST-Segment Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention

Abstract Background Acute myocardial infarction is the most severe manifestation of coronary artery disease, which causes more than 2.4 million deaths in the USA, more than 4 million deaths in Europe and northern Asia, and more than a third of deaths in developed nations annually. Objective To assess the prognostic value of systemic arterial lactate levels in patients with ST segment elevation myocardial infarction undergoing primary PCI and correlate with the results of primary PCI and 30 days MACE follow up. Patients and Methods This study included 300 patients who presented with documented STEMI and underwent reperfusion by successful primary PCI in Ain Shams University hospitals. Results There was statistically significant positive correlation found between serum lactate and (WBCs) count, (HbA1C) level and cardiac enzymes (CKtotal - CKmb – troponin) and negative correlation found between serum lactate and ejection fraction in echocardiography. Also, we found that other parameters were associated with MACE follow up in 30 days such as Killip class at admission, ST segment elevation resolution, heart block in ECG, lower ejection fraction, dyslipidemia, post-procedure TIMI flow, peri-procedural time intervals and occurrence of complications. Conclusion The value of an early lactate measurement in patients with STEMI is to be a part of the risk stratification of these patients and intensified medical care should be considered to patients with strongly elevated lactate levels. Also, increasing arterial lactate levels were associated with occurrence of MACE in 30 days, worse hemodynamics, lower ejection fraction in echocardiography, higher HbA1C level, large infarct area (cardiac biomarkers peak level), poor post-procedure TIMI flow and thrombus grade.

Sex-Based Differences in Clinical Characteristics of Patients with Acute Myocarditis: A Cohort Study

BackgroundThis study investigated sex differences in acute myocarditis patients during index hospitalization. MethodsWe included 365 patients with acute myocarditis, hospitalized with continuous monitoring at the intensive care unit from 2000-2023 into the Basel Myocarditis Cohort study. We compared sex differences in clinical presentation, the presenting electrocardiogram, prior medical history, inflammatory and cardiac biomarkers, cardiac imaging, arrhythmia occurrence, and short- to midterm outcomes. ResultsMean age was 41.3 years, and 26.3% were female. Compared with men, women were older (median 49.7 vs 38.3 years, P < .001) at the time of diagnosis and presented more frequently with dyspnea (41 vs 26%, P = .013) and a higher Killip class (P = .011). In the presenting electrocardiogram, men had a higher occurrence of diffuse ST-elevation (38 vs 9%, P < .001) and PQ-depression (31 vs 20%, P = .042), compared with women. Women had higher N-terminal pro B-type natriuretic peptide levels (1180 vs 387 ng/L, P = .015), lower cardiac troponin T levels (389 vs 726 ng/L, P = .006), and fewer segments with nonischemic late gadolinium enhancement on cardiac magnetic resonance imaging (1 vs 3, P = .005), but similar left ventricular ejection fraction (55 vs 55%, P = .629), compared with men. Overall, hospital stay was longer in women compared with men (7 vs 5 days, P = .018), with a similar length of intensive care unit stay (2.6 vs 2.7 days, P = .922). Women more often developed severe arrhythmia (8.3 vs 2.2%, P = .015) and heart failure during the hospitalization (31.3 vs 16.4%, P = .003). ConclusionCompared with men, women with acute myocarditis were older at the time of diagnosis, presented more often with heart failure, and had an increased frequency of severe arrhythmia.

Left Ventricular Remodeling after Percutaneous Coronary Intervention in Acute Myocardial Infarction Complicated by Acute Heart Failure

The aim. To establish the relationship between structural-functional and laboratory parameters in patients with myocardial infarction (MI) and heart failure (HF) undergoing percutaneous coronary intervention (PCI). Materials and methods. We examined 308 MI patients who were divided into 3 groups: 161 patients without signs of acute heart failure (AHF) (group I), 99 with Killip class II-III AHF (group II) and 48 with Killip class IV (cardiogenic shock) (group III). All the patients underwent general clinical examinations: complete blood count, lipid profile, creati-nine, quantitative determination of troponin I, D-dimer, creatine kinase-MB, electrocardiography, coronary angiography with PCI, focused cardiac ultrasound and standard echocardiography over 3-5 days. Results. According to the focused cardiac ultrasound, the majority of MI patients with signs of AHF had preserved left ventricle function, and only 8.2% of patients had left ventricle ejection fraction (LVEF) ˂40%. The most significant structural and functional changes were observed in group II. After PCI, a significant increase in left ventricle contractility was found in all groups, but in the group II, the increase in LVEF was more pronounced. The severity of HF manifestations increased depending on the severity of diastolic dysfunction. Many correlations were established: an inverse relationship between LVEF and the presence of HF, the number ofaffected vessels, proximal left anterior descending artery lesions, low-density lipoprotein cholesterol, and atrium fibrilla-tion; a direct relationship between LVEF and hemoglobin levels and glomerular filtration rate. Conclusions. The vast majority of patients with MI and signs of AHF had preserved left ventricle contractile function. High-grade HF manifestations increase depending on the severity of diastolic dysfunction. Myocardial revascularization in MI pa-tients significantly improves functional and volumetric parameters of myocardial function. Numerous correlations between structural-functional and laboratory parameters in patients with MI and HF who underwent PCI have been established.

Predictors of Optical Coherence Tomography-Defined Calcified Nodules in Patients With Acute Coronary Syndrome - A Substudy From the TACTICS Registry.

Recent studies suggest that the presence of calcified nodules (CN) is associated with worse prognosis in patients with acute coronary syndrome (ACS). We investigated clinical predictors of optical coherence tomography (OCT)-defined CN in ACS patients in a prospective multicenter registry.Methods and Results: We investigated 695 patients enrolled in the TACTICS registry who underwent OCT assessment of the culprit lesion during primary percutaneous coronary intervention. OCT-CN was defined as calcific nodules erupting into the lumen with disruption of the fibrous cap and an underlying calcified plate. Compared with patients without OCT-CN, patients with OCT-CN (n=28) were older (mean [±SD] age 75.0±11.3 vs. 65.7±12.7 years; P<0.001), had a higher prevalence of diabetes (50.0% vs. 29.4%; P=0.034), hemodialysis (21.4% vs. 1.6%; P<0.001), and Killip Class III/IV heart failure (21.4% vs. 5.7%; P=0.003), and a higher preprocedural SYNTAX score (median [interquartile range] score 15 [11-25] vs. 11 [7-19]; P=0.003). On multivariable analysis, age (odds ratio [OR] 1.072; P<0.001), hemodialysis (OR 16.571; P<0.001), and Killip Class III/IV (OR 4.466; P=0.004) were significantly associated with the presence of OCT-CN. In non-dialysis patients (n=678), age (OR 1.081; P<0.001), diabetes (OR 3.046; P=0.014), and Killip Class III/IV (OR 4.414; P=0.009) were significantly associated with the presence of OCT-CN. The TACTICS registry shows that OCT-CN is associated with lesion severity and poor clinical background, which may worsen prognosis.

Predictors of work inability after acute myocardial infarction in Switzerland

This study aimed to examine whether acute myocardial infarction (AMI) patients in Switzerland return to work and identify factors associated therewith. Data of 4315 working-age AMI patients enrolled in the Swiss AMIS Plus registry between 01/2006 and 09/2021 with 1-year follow-up and self-reported work status were analyzed. Patient characteristics were compared between those who did not reduce their work hours, those who reduced, and those who were no longer working 1 year after AMI. Multinomial logistic regression was used to analyze independent predictors of working ability. Of the patients, 3204 (74.3%) did not reduce their work hours, 592 (13.7%) reduced and 519 (12.0%) were no longer working 1 year after AMI. Women were more likely to reduce or stop working. Patients who did not reduce were more frequently young and male. Multinomial logistic regression showed that work reduction was associated with female sex and a Killip class > 2 at admission whereas stopping work was associated with female sex and comorbidities. A high rate of AMI patients in Switzerland (88%) return to work 1 year after AMI. Approximately 1 in 8 did not return to work and approximately 1 in 7 reduced their work hours. Important factors associated with reducing or no longer working after AMI were female sex, older age and a higher proportion of comorbidities.

Very early vs delayed invasive strategy in high-risk NSTEMI patients without hemodynamic instability: Insight from the KAMIR-NIH

Background High-risk non-ST-elevation myocardial infarction (NSTEMI) patients’ optimal timing for percutaneous coronary intervention (PCI) is debated despite the recommendation for early invasive revascularization. This study aimed to compare outcomes of NSTEMI patients without hemodynamic instability undergoing very early invasive strategy (VEIS, ≤ 12 hours) versus delayed invasive strategy (DIS, &gt;12 hours). Methods Excluding urgent indications for PCI including initial systolic blood pressure under 90 mmHg, ventricular arrhythmia, or Killip class IV, 4,733 NSTEMI patients were recruited from the Korea Acute Myocardial Infarction Registry-National Institutes of Health (KAMIR-NIH). Patients were divided into low and high- global registry of acute coronary events risk score risk score (GRS) groups based on 140. Both groups were then categorized into VEIS and DIS. Clinical outcomes, including all-cause death (ACD), cardiac death (CD), recurrent MI, and cerebrovascular accident at 12 months, were evaluated. Results Among 4,733 NSTEMI patients, 62% had low GRS, and 38% had high GRS. The proportions of VEIS and DIS were 43% vs. 57% in the low GRS group and 47% vs. 53% in the high GRS group. In the low GRS group, VEIS and DIS demonstrated similar outcomes; however, in the high GRS group, VEIS exhibited worse ACD outcomes compared to DIS (HR = 1.46, P = 0.003). The adverse effect of VEIS was consistent with propensity score matched analysis (HR = 1.34, P = 0.042). Conclusion VEIS yielded worse outcomes than DIS in high-risk NSTEMI patients without hemodynamic instability in real-world practice.

N-terminal pro-B-type natriuretic peptide and pulmonary echography are predictors of acute heart failure needing early mechanical ventilation in acute coronary syndrome.

The aim of this study was to determine the best clinical predictors of acute heart failure needing mechanical ventilation (MV) in the first 48 h of evolution of patients admitted because of acute coronary syndrome (ACS). We analyzed a cohort of patients admitted for ACS between February 2017 and February 2018. A pulmonary ultrasound was performed on admission and was considered positive (PE+) when there were three or more B-lines in two quadrants or more of each hemithorax. It was compared with N-terminal pro-B-type natriuretic peptide (NT-proBNP), peak troponin T-us value GRACE (Global Registry of Acute Coronary Events), CRUSADE (Can Rapid risk stratification of Unstable angina patients Suppress ADverse outcomes with Early implementation of the American College of Cardiology and American Heart Association guidelines - Bleeding Score), CACS (Canada Acute Coronary Syndrome risk score), and HAMIOT (Heart Failure after Acute Myocardial Infarction with Optimal Treatment score) scores, shock index, ejection fraction, chest X-ray, and Killip class at admission as predictors of MV in the first 48 h of admission. A total of 119 patients were included: 54.6% with ST elevation and 45.4% without ST elevation. Twelve patients (10.1%) required MV in the first 48 h of evolution. The sensitivity of PE+ was 100% (73.5-100%), specificity 91.6% (84.6-96.1%), and area under the curve was 0.96 (0.93-0.96). The sensitivity of an NT-proBNP value more than 3647 was 88.9% (51.9-99.7%), specificity 92.1% (84.5-96.8%), and area under the curve was 0.905 (0.793-1). The κ statistic between both predictors was 0.579. All the other scores were significantly worse than PE + . Lung ultrasound and a high NT-proBNP (3647 ng/L in our series) on admission are the best predictors of acute heart failure needing MV in the first 48 h of ACS. The agreement between both tests was only moderate.

Impact of fragmented QRS on in-hospital mortality in emergency coronary artery bypass grafting for STEMI: A retrospective analysis

Objective: Fragmented QRS complex (fQRS) is associated with increased morbidity and mortality, sudden cardiac death, and recurrent cardiovascular events. The role of coronary artery bypass grafting (CABG) in the primary treatment of acute myocardial infarction remains controversial. In this study, we aimed to assess the predictive value of fQRS in-hospital mortality among acute segment elevation myocardial infarction (STEMI) patients undergoing emergency CABG for primary revascularization. Patients and Methods: Between 2010 and 2020, we retrospectively included 99 consecutive STEMI patients who were not eligible for primary percutaneous intervention and required emergency CABG. The study population was divided into two groups: survivors and non-survivors. We compared the two groups regarding demographic, clinical, and operative characteristics. Results: fQRS was identified as an independent predictor of in-hospital mortality (p = 0.037). Additionally, left ventricular ejection fraction (LVEF) was an independent predictor of in-hospital mortality (p = 0.028). Glomerular filtration rate (GFR), glucose levels, and Killip class ≥ III were significantly associated with in-hospital mortality (p = 0.002), (p = 0.001) and (p &amp;lt; 0.001). Conclusion: fQRS emerged as an independent predictor of in-hospital mortality among patients undergoing emergency CABG for primary revascularization in cases of STEMI.

Ensemble machine learning for predicting in-hospital mortality in Asian women with ST-elevation myocardial infarction (STEMI)

The accurate prediction of in-hospital mortality in Asian women after ST-Elevation Myocardial Infarction (STEMI) remains a crucial issue in medical research. Existing models frequently neglect this demographic's particular attributes, resulting in poor treatment outcomes. This study aims to improve the prediction of in-hospital mortality in multi-ethnic Asian women with STEMI by employing both base and ensemble machine learning (ML) models. We centred on the development of demographic-specific models using data from the Malaysian National Cardiovascular Disease Database spanning 2006 to 2016. Through a careful iterative feature selection approach that included feature importance and sequential backward elimination, significant variables such as systolic blood pressure, Killip class, fasting blood glucose, beta-blockers, angiotensin-converting enzyme inhibitors (ACE), and oral hypoglycemic medications were identified. The findings of our study revealed that ML models with selected features outperformed the conventional Thrombolysis in Myocardial Infarction (TIMI) Risk score, with area under the curve (AUC) ranging from 0.60 to 0.93 versus TIMI's AUC of 0.81. Remarkably, our best-performing ensemble ML model was surpassed by the base ML model, support vector machine (SVM) Linear with SVM selected features (AUC: 0.93, CI: 0.89–0.98 versus AUC: 0.91, CI: 0.87–0.96). Furthermore, the women-specific model outperformed a non-gender-specific STEMI model (AUC: 0.92, CI: 0.87–0.97). Our findings demonstrate the value of women-specific ML models over standard approaches, emphasizing the importance of continued testing and validation to improve clinical care for women with STEMI.

The Gender Spectrum of In-hospital Survival Post Primary Percutaneous Coronary Intervention for ST Elevation Myocardial Infarction: Exploring Age-driven Trends.

The study was aimed to evaluate gender difference and age & gender specific interaction of in-hospital outcomes of patients with ST elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI). This was a prospective cohort study of 1748 patients with STEMI undergoing primary PCI. The study was dichotomised according to gender to evaluate the difference in the outcome. The study was further stratified based on an age cut-off of 75 years to examine the age-specific gender relationship in survival outcomes. Independent variables for in-hospital mortality were analysed through logistic regression. There were 314 (17.96%) females with an average age of 60.80 years and 1434 (82.03%) males with an average age of 54.87 years. The prevalence of diabetes (24.8% vs. 13.2%) and hypertension (33.1% vs. 12.9%) was significantly higher in female patients compared to male patients, whereas the significantly higher number of male patients were smokers. On multivariate analysis, odds of female gender OR = 3.54 (1.37-9.17), killip class >2 OR = 3.05 (1.97-4.71) and baseline creatinine OR = 2.27 (1.22-4.23) were found as significant predictors of in-hospital mortality. The crude odds ratio of 2.35 (1.49-3.72) and adjusted OR of 2.05 (1.27-3.30) for female mortality was significant among patients aged <75-years. While patients with ≥75-years of age, the mortality difference was insignificant. Although the incidence of STEMI was higher in male compared to female patients, female patients had two-fold higher in-hospital mortality than male. Female gender was an independent predictor for in-hospital mortality in patients <75-years of age.

Comprehensive Cardiac Rehabilitation Following Acute Myocardial Infarction Improves Clinical Outcomes Regardless of Exercise Capacity.

Reduced exercise capacity is a prognostic indicator of adverse outcomes in patients with acute myocardial infarction (AMI). However, few studies have evaluated the effectiveness of comprehensive cardiac rehabilitation (CR) in this population. This study aimed to clarify the efficacy of comprehensive CR in patients with AMI and reduced exercise capacity.Methods and Results: This cohort study included 610 patients with AMI who underwent percutaneous coronary intervention. Major adverse cardiovascular events (MACE) were compared between patients who participated in comprehensive outpatient CR for 150 days (CR group; n=430) and those who did not (non-CR group; n=180). During the mean (±SD) follow-up period of 6.1±4.0 years, the CR group exhibited a lower incidence of MACE (log-rank P=0.002). Multivariable analysis revealed that Killip classification, diuretics at discharge, and participation in comprehensive CR were independently associated with MACE. The CR group was further divided into 2 groups, namely reduced exercise capacity (% predicted peak V̇O2<80%; n=241) and preserved exercise capacity (≥80%; n=147), based on the initial cardiopulmonary exercise test. Despite distinct exercise capacities, the incidence of MACE was comparable and physical parameters improved similarly after comprehensive CR in both groups. Comprehensive CR in patients with AMI effectively reduced the incidence of MACE regardless of initial exercise capacity. Cardiologists should actively encourage patients with low exercise capacity to participate in comprehensive CR.

Risk factor profile and outcomes in young patients presenting with acute ST-segment elevation myocardial Infarction

Abstract Introduction ST-elevation myocardial infarction (STEMI) is more prevalent in the elderly population1, but is now becoming more common in the younger population. It has been of particular concern due to its potential for premature death and long-term morbidity. Early identification and timely modification of risk factors in this population is critical2,3. Secondary prevention issues in populations are well studied, and such data for young adults are lacking in the literature. Purpose The purpose of this study was to compare pattern of traditional CVD risk factors, hospital mortality and major adverse cardiac events at discharge in young versus old patients (≤45years and above 45 years age respectively) admitted with STEMI and undergoing primary PCI. Methods This retrospective cohort study was conducted on consecutive patients presenting with STEMI between June 2013 and June 2018 in a single centre cardiac only tertiary care setup. Institute’s registry is fashioned along and is affiliated with US NCDR. Patients with cardiac arrest or cardiogenic shock at arrival were excluded. MACE was defined as post PCI cardiac arrest or cardiogenic shock, heart failure, major bleed or hospital death. Results Total of 5343 patients were admitted with STEMI during study period, after exclusion data of 1642 patients were analyzed. Table 1 demonstrates demographic and historical characteristics of the study population. Among young patients, the frequency of the male gender,any tobacco use and family history of premature coronary artery disease were significantly higher (all p values &amp;lt; 0.001). While in older STEMI patients frequency of heart failure, hypertension, prior myocardial infarction, diabetes mellitus ,abnormal creatinine clearance (&amp;lt;90 mL/min/1.73 m²) , multi-vessel coronary disease, advanced Killip class and higher body mass index was more prevalent (all P&amp;lt;0.001). Table 2 demonstrates predictors of in hospital death and MACE. Among young patients advanced Killip class and femoral access site(all P values &amp;lt;0.001), diabetes mellitus (p=0.03), abnormal creatinine clearance(p=0.04),and left ventricular ejection fraction less than 40%(p=0.01), were more significant in-hospital mortality predictor where as advanced Killip class,Left ventricular ejection fraction less than 40% male gender(p=0.04), diabetes mellitus(p=0.001),femoral access site(p=0.001), and Left ventricular ejection fraction less than 40% were more significant MACE predictors (all P&amp;lt;0.001). Conclusion There were no significant difference in hospital mortality and MACE among young versus old STEMI patients when adjusted for diabetes mellitus, abnormal creatinine clearance (&amp;lt;90 mL/min/1.73 m²), multi-vessel coronary disease, advanced Killip class. Tobacco use is the main modifiable risk factors for young patients with STEMI. Surprisingly, being a woman and having a positive family history with premature coronary artery disease were protective.