Outcomes In Acute Myocardial Infarction Patients Research Articles

Characteristics and outcomes of myocardial infarction among patients with bleeding or hypercoagulable disorders: A nationwide analysis

ObjectiveTo examine the characteristics and outcomes of acute myocardial infarction (AMI) in patients with bleeding and/or hypercoagulable disorders. BackgroundStudies examining the outcomes of AMI in bleeding/hypercoagulable disorders are scarce. MethodsThe Nationwide Readmissions Database was utilized to identify hospitalizations with AMI from 2016 to 2020. The study cohort was divided into 4 groups: (1) MI without bleeding or hypercoagulable disorders, (2) MI with bleeding disorders, (3) MI with hypercoagulable disorders and (4) MI with mixed disorders. The main outcome was all-cause in-hospital mortality. ResultsA total of 4,206,005 weighted hospitalizations with AMI were identified during the study period, of which 382,118 (9.1 %) had underlying bleeding or hypercoagulable disorders.The utilization of invasive strategies for the management of MI was highest in patients without bleeding or hypercoagulable disorders (62.6 %) and lowest in patients with mixed disorders (39.3 %). In-hospital mortality was higher among patients with bleeding (adjusted odds ratio [OR] 1.22; 95 % confidence interval [CI] 1.21, 1.24) and mixed disorders (aOR 3.38; 95 % CI 3.27, 3.49) compared with patients without bleeding or hypercoagulable disorders. Among patients with any bleeding or hypercoagulable disorder, those who underwent invasive strategy had lower adjusted odds of in-hospital mortality (aOR 0.28; 95 % CI 0.27, 0.30), ischemic stroke (aOR 0.60; 95 % CI 0.56, 0.64), bleeding (aOR 0.63; 95 % CI 0.61, 0.65), blood transfusion (aOR 0.95; 95 % CI 0.91, 0.99) and 30-day urgent readmissions (aOR 0.70; 95 % CI 0.68, 0.72). ConclusionsThe inpatient management and outcomes of AMI in patients with bleeding/hypercoagulable disorders differ from patients without those disorders.Revascularization in the setting of AMI was associated with lower in-hospital mortality, which suggests that patients with bleeding/hypercoagulable disorders can be evaluated for standard approaches to managing AMI; however, confounding by indication may be a concern.

Chemerin in the Spotlight: Revealing Its Multifaceted Role in Acute Myocardial Infarction.

Chemerin, an adipokine known for its role in adipogenesis and inflammation, has emerged as a significant biomarker in cardiovascular diseases, including acute myocardial infarction (AMI). Recent studies have highlighted chemerin's involvement in the pathophysiological processes of coronary artery disease (CAD), where it modulates inflammatory responses, endothelial function, and vascular remodelling. Elevated levels of chemerin have been associated with adverse cardiovascular outcomes, including increased myocardial injury, left ventricular dysfunction, and heightened inflammatory states post-AMI. This manuscript aims to provide a comprehensive review of the current understanding of chemerin's role in AMI, detailing its molecular mechanisms, clinical implications, and potential as a biomarker for diagnosis and prognosis. Additionally, we explore the therapeutic prospects of targeting chemerin pathways to mitigate myocardial damage and improve clinical outcomes in AMI patients. By synthesizing the latest research findings, this review seeks to elucidate the multifaceted role of chemerin in AMI and its promise as a target for innovative therapeutic strategies.

A systematic review and meta-analysis of the effect of hyperglycemia on admission for acute myocardial infarction in diabetic and non-diabetic patients

IntroductionRegarding a potential relationship between diabetes and the prognostic significance of hyperglycemia in patients presenting with acute myocardial infarction (AMI), there is still debate. Therefore, we aimed in this study to demonstrate the effect of hyperglycemia on different outcomes in AMI patients, whether they are diabetic or not.MethodsWe searched PubMed, Web of Science, and Scopus using the following search strategy: “Diabetes” or “Diabetic” AND “Acute myocardial infarction” OR “AMI” AND “hyperglycemia” OR “glucose level” to find eligible articles that needed to go through the screening process for inclusion in our study. We conducted a meta-analysis of 19 included studies from Japan, Germany, China, the United Kingdom, and others using Review Manager version 5.4 software, pooling the mean difference in continuous variables, the number and total of dichotomous variables to measure the odds ratio (OR), and the generic inverse variance of OR or hazard ratio (HR) as reported in the included studies.ResultsThe mean age of the participants ranged from 56.3 to 72.3 years old. The difference in blood glucose levels between diabetes and non-diabetes patients was found to be statistically significant, with an SMD of 1.39 (95%CI: 1.12, 1.66, p < 0.00001). In diabetic patients, hyperglycemia was statistically significantly associated with mortality, with a HR of 1.92 (95% CI: 1.45, 2.55, p < 0.00001) and an OR of 1.76 (95% CI: 1.15, 2.7, p = 0.01). In non-diabetic patients admitted with AMI, hyperglycemia was statistically significantly associated with mortality, with a HR of 1.56 (95% CI: 1.31, 1.86, p < 0.00001) and an OR of 2.89 (95% CI: 2.47, 3.39, p < 0.00001). AMI patients who were diabetic were statistically more likely to have a major adverse cardiovascular event (MACE) (HR = 1.9; 95% CI: 1.19–3.03; p = 0.007). AMI patients who were not diabetic were also statistically more likely to have a MACE (HR = 1.6; 95% CI: 1.15–2.23, p = 0.006).ConclusionHyperglycemia in AMI patients is a predictor of worse outcomes, including MACE and mortality, regardless of whether these patients are diabetic or not. In these patients, some factors act as predictors of mortality, including older age, higher glucose levels on admission, and a high Killip class.

Impact of Early Invasive Strategy on Left Ventricular Function Recovery in Acute Myocardial Infarction Patients in Pakistan.

Background Acute myocardial infarction (AMI) is a leading cause of morbidity and mortality worldwide, particularly in low- and middle-income countries like Pakistan, where healthcare resources are limited. Early Invasive Strategy (EIS), typically involving percutaneous coronary intervention (PCI), has been shown to improve outcomes in AMI patients. However, the effectiveness of EIS in resource-limited settings, such as Pakistan, remains under-explored. Objective This prospective observational cohort study aimed to assess the impact of an Early Invasive Strategy (EIS) on left ventricular (LV) function recovery in acute myocardial infarction (AMI) patients in Pakistan. The primary objective was to measure the change in left ventricular ejection fraction (LVEF) over six months. Secondary objectives included evaluating mortality, rehospitalization rates, and incidences of major adverse cardiovascular events (MACE). Multivariate regression analysis was employed to adjust for potential confounders. Methods The study was conducted from January to December 2023 at the National Institute of Cardiovascular Diseases (NICVD) satellite centers in Sukkur, Nawab Shah, and Khairpur. A total of 300 AMI patients presenting within 24 hours of symptom onset were included. Participants were divided into two groups: the EIS group (n = 150) received percutaneous coronary intervention (PCI) within 24 hours of admission, while the delayed treatment group (n = 150) received standard therapy, with invasive procedures performed after 24 hours if clinically indicated. Data were collected at baseline, during hospitalization, and at three- and six-months post-AMI. Results The EIS group demonstrated a significantly greater improvement in LVEF compared to the delayed treatment group (13.1% [95% CI, 10.8%-15.4%] vs. 7.5% [95% CI, 5.8%-9.2%], p < 0.001). Mortality was lower in the EIS group (3% [n = 4] vs. 9% [n = 13], p = 0.01), as were rehospitalizations for heart failure (7% [n = 10] vs. 14% [n = 21], p = 0.02) and incidences of MACE (8% [n = 12] vs. 16% [n = 24], p = 0.01). Multivariate regression analysis confirmed that EIS was independently associated with better LVEF improvement (coefficient = 5.78 [95% CI, 4.21-7.35], p < 0.001). Conclusion Early invasive treatments significantly enhance left ventricular function recovery and reduce mortality and rehospitalization rates in AMI patients in Pakistan. These findings advocate for the implementation of timely PCI interventions in resource-limited settings to improve clinical outcomes, particularly emphasizing cost-effectiveness and the availability of PCI.

Prognostic impact of new-onset atrial fibrillation in myocardial infarction with and without improved ejection fraction.

Improvement in left ventricular ejection fraction (impEF) often presents in contemporary acute myocardial infarction (AMI) patients. New-onset atrial fibrillation (NOAF) during AMI is an important predictor of subsequential heart failure (HF), while its impact on the trajectory of post-MI left ventricular ejection fraction (LVEF) and prognostic implication in patients with and without impEF remains undetermined. We aimed to investigate the prognostic impacts of NOAF in AMI patients with and without impEF. Consecutive AMI patients without a prior history of AF between February 2014 and March 2018 with baseline LVEF≤40% and had ≥1 LVEF measurement after baseline were included. ImpEF was defined as a baseline LVEF≤40% and a re-evaluation showed both LVEF>40% and an absolute increase of LVEF≥10%. Persistently reduced EF (prEF) was defined as the second measurement of LVEF either ≤40% or an absolute increase of LVEF<10%. The primary endpoint was a major adverse cardiac event (MACE) that was composed of cardiovascular death and HF hospitalization. Cox regression analysis and competing risk analysis were performed to assess the association of post-MI NOAF with MACE. Among 293 patients (mean age: 66.6±11.3years, 79.2% of males), 145 (49.5%) had impEF and 67 (22.9%) developed NOAF. Higher heart rate (odds ratio [OR]: 0.84, 95% confidence interval [CI]: 0.73-0.97; P=0.015), prior MI (OR: 0.25, 95% CI: 0.09-0.69; P=0.008), and STEMI (OR: 0.40, 95% CI: 0.21-0.77; P=0.006) were independent predictors of post-MI impEF. Within up to 5years of follow-up, there were 22 (15.2%) and 53 (35.8%) MACE in patients with impEF and prEF, respectively. NOAF was an independent predictor of MACE in patients with impEF (hazard ratio [HR]: 7.34, 95% CI: 2.49-21.59; P<0.001) but not in those with prEF (HR: 0.78, 95% CI: 0.39-1.55; P=0.483) after multivariable adjustment. Similar results were obtained when accounting for the competing risk of all-cause death (subdistribution HR and 95% CIs in impEF and prEF were 6.47 [2.32-18.09] and 0.79 [0.39-1.61], respectively). The NOAF was associated with an increased risk of cardiovascular outcomes in AMI patients with impEF.

Stress, Hyperglycemia, and Insulin Resistance Correlate With Neutrophil Activity and Impact Acute Myocardial Infarction Outcomes.

Introduction Acute insulin resistance (IR) and hyperglycemia are frequently observed during acute myocardial infarction (AMI), significantly influencing both immediate and long-term patient outcomes, irrespective of diabetic status. Neutrophilia and increased neutrophil activity, which are common in these scenarios, have been associated with poorer prognoses, as demonstrated in our recent findings. While it is well established that neutrophils and stress-induced hyperglycemia exacerbate inflammation and hinder recovery, the complex interplay between these factors and their combined impact on AMI prognosis remains inadequately understood. This study aims to investigate the effects of stress hyperglycemia and IR on AMI patients at the onset of the event and to elucidate the relationship between these metabolic disturbances and inflammatory markers, particularly neutrophils. Methods We conducted a longitudinal prospective study on 219 AMI patients at Elias Emergency Hospital in Bucharest, Romania, from April 2021 to September 2022. Patients were included within 24 hours of AMI with ST-segment elevation and excluded if they had acute infections or chronic inflammatory diseases. Blood samples were collected to study inflammatory biomarkers, including neutrophil extracellular traps (NETs), S100A8/A9, interleukin (IL)-1β, IL-18, and IL-6. Diabetic and pre-diabetic statuses were defined using glycated hemoglobin (HbA1c) and medical history (ADA 2019 criteria). To assess glycemic parameters, we employed the glycemia ratio (GR) and the homeostatic model assessment of insulin resistance (HOMA-IR) index, enabling a precise evaluation of stress hyperglycemia, acute IR, and their prognostic implications. Patients were stratified into groups based on GR calculations, categorized as under-average glycemia, normal glycemia, and stress hyperglycemia. Results The majority of patients in the stress hyperglycemia group exhibited an unfavorable prognosis. This group also demonstrated significantly elevated neutrophil counts and neutrophil-to-lymphocyte ratios (NLR). The GR was significantly and positively correlated with inflammation markers, including neutrophil count (Pearson's R = 0.181, P = 0.008) and NLR (Pearson's R = 0.318, P < 0.001), but showed no significant correlation with other evaluated inflammatory markers. Conclusions Our findings suggest that poor outcomes in AMI patients may be associated with stress hyperglycemia, as indicated by GR. AcuteIR, quantified by GR and HOMA-IR, exhibits a strong correlation with neutrophil count and NLR within the first 24 hours of AMI onset. However, no significant correlation was observed with other inflammatory markers, such as IL-1β, IL-18, and IL-6, underscoring the specific interplay between IR and neutrophil activity in this setting.

CatLet score and clinical CatLet score as predictors of long-term outcomes in patients with acute myocardial infarction presenting later than 12 hours from symptom onset

Background Our recently developed C oronary A rtery T ree description and L esion E valua T ion (CatLet) angiographic scoring system is unique in its description of the variability in the coronary anatomy, the degree of stenosis of a diseased coronary artery, and its subtended myocardial territory, and can be utilized to predict clinical outcomes for patients with acute myocardial infarction (AMI) presenting ≤12 h after symptom onset. The current study aimed to assess whether the Clinical CatLet score (CCS), as compared with CatLet score (CS), better predicted clinical outcomes for AMI patients presenting >12 h after symptom onset. Methods CS was calculated in 1018 consecutive AMI patients enrolled in a retrospective registry. CCS was calculated by multiplying CS by the ACEF I score (age, creatinine, and left ventricular ejection fraction). Primary endpoint was major adverse cardiac events (MACEs) at 4-year-follow-up, a composite of cardiac death, myocardial infarction, and ischemia-driven revascularization. Results Over a 4-year follow-up period, both scores were independent predictors of clinical outcomes after adjustment for a broad spectrum of risk factors. Areas-under-the-curve (AUCs) for CS and CCS were 0.72(0.68–0.75) and 0.75(0.71–0.78) for MACEs; 0.68(0.63–0.73) and 0.78(0.74–0.83) for all-cause death; 0.73(0.68–0.79) and 0.83(0.79–0.88) for cardiac death; and 0.69(0.64–0.73) and 0.75(0.7–0.79) for myocardial infarction; and 0.66(0.61–0.7) and 0.63(0.58–0.68) for revascularization, respectively. CCS performed better than CS in terms of the above-mentioned outcome predictions, as confirmed by the net reclassification and integrated discrimination indices. Conclusions CCS was better than CS to be able to risk-stratify long-term outcomes in AMI patients presenting >12 h after symptom onset. These findings have indicated that both anatomic and clinical variables should be considered in decision-making on management of patients with AMI presenting later.

Impact of multivessel versus single-vessel disease on the association between low diastolic blood pressure and mortality after acute myocardial infarction with revascularization.

Previous studies demonstrated a J-shaped relationship between low diastolic blood pressure (DBP) and adverse clinical outcomes in patients with acute myocardial infarction (AMI) that was sensitive to revascularization. Hypothesized herein, was that this relationship differs between patients with multivessel disease (MVD) and those with single-vessel disease due to differing degrees of myocardial ischemic burden. Among 9,983 AMI patients from the Korea Acute Myocardial Infarction Registry database who underwent percutaneous coronary intervention and were followed up for a median duration of 3.2 years, average on-treatment DBP was calculated at admission, discharge, and every scheduled visit and divided into these parameters: < 70 mmHg, 70-74 mmHg, 75-79 mmHg, and ≥ 80 mmHg. The relationship between average on-treatment DBP and clinical outcomes including all-cause death, cardiovascular (CV) death, non-CV death, and hospitalization for heart failure was analyzed using the Cox regression models adjusted for clinical covariates. In patients with MVD, all-cause death (hazard ratio [HR]: 1.47; 95% confidence interval [CI]: 1.06-2.04, p = 0.012) and CV death (HR: 1.59; 95% CI: 1.02-2.46, p = 0.027) were significantly increased in patients with a DBP < 70 mmHg, showing a J-shaped relationship. However, these findings were not significant for single-vessel disease. On a sensitivity analysis excluding subjects with a baseline SBP < 120 mmHg, an increased risk of a low DBP < 70 mmHg remained in MVD. The J-shaped relationship between low DBP and adverse clinical outcomes in AMI patients who underwent revascularization persisted in MVD, which has a high ischemic burden. These high-risk patients require cautious treatment.

α1-Antichymotrypsin Complex (SERPINA3) Is an Independent Predictor of All-Cause but Not Cardiovascular Mortality in Patients Hospitalized for Chest Pain of Suspected Coronary Origin

Introduction: SERPINA3 is an acute-phase protein triggered by inflammation. It is upregulated after an acute myocardial infarction (AMI). Data on its long-term prognostic value in MI patients are scarce. We aimed to assess the utility of SERPINA3 as a prognostic marker in patients hospitalized for chest pain of suspected coronary origin. Methods: A total of 871 consecutive patients, 386 diagnosed with AMI, were included. Stepwise Cox regression models, applying continuous loge-transformed values, were fitted for the biomarker with all-cause mortality and cardiac death within 2 years or all-cause mortality within the median 7 years as dependent variables. An analysis of MI and stroke, and combined endpoints, respectively, was added. The hazard ratio (HR) (95% CI) was assessed in a univariate and multivariable model. Results: Plasma samples from 847 patients were available. By 2-year follow-up, 138 (15.8%) patients had died, of which 86 were cardiac deaths. The univariate analysis showed a significant association between SERPINA3 and all-cause mortality (HR 1.41 [95% 1.19–1.68], p < 0.001) but not for cardiac death. Associations after adjustment were non-significant. By 7-year follow-up, 332 (38.1%) patients had died. SERPINA3 was independently associated with all-cause mortality from the third year onward. The HR was 1.14 (95% CI, 1.02–1.28), p = 0.022. Similar results applied to combined endpoints, but not for MI and stroke, respectively. The prognostic value of SERPINA3 was limited to non-AMI patients. No independent associations were noted among AMI patients. Conclusions: SERPINA3 predicts long-term all-cause mortality but fails to predict outcome in AMI patients.

The impact of the time factors on the exercise-based cardiac rehabilitation outcomes of the patients with acute myocardial infarction after percutaneous coronary intervention: a systematic review and meta-analysis

Background and objectiveCardiac rehabilitation (CR) has been demonstrated to improve outcomes in patients with acute myocardial infarction (AMI) after percutaneous coronary intervention (PCI). However, the optimal CR initiation time and duration remain to be determined. This study aimed to explore the impact of the time factors on the CR outcomes in AMI patients who received PCI by the method of meta-regression analysis.MethodsWe searched five databases (PubMed, Embase, Cochrane Library, Web of Science and Google scholar) up to October 31, 2023. Meta-regression analysis was utilized to explore the impact of the time factors on the effect sizes. Subgroups with more than 3 studies were used for meta-regression analysis.ResultsOur analysis included 16 studies and a total of 1810 patients. The meta-regression analysis revealed that the initiation time and duration of CR had no significant impact on the occurrence of arrhythmia, coronary artery restenosis and angina pectoris. The initiation time and duration of CR also had no significant impact on the changes in left ventricular ejection fraction (LVEF, starting time: estimate = 0.160, p = 0.130; intervention time: estimate = 0.017, p = 0.149), left ventricular end-diastolic volume (LVEDV, starting time: estimate = − 0.191, p = 0.732; intervention time: estimate = − 0.033, p = 0.160), left ventricular end-systolic volume (LVESV, starting time: estimate = − 0.301, p = 0.464; intervention time: estimate = 0.015, p = 0.368) and 6-minute walk test (6MWT, starting time: estimate = − 0.108, p = 0.467; intervention time: estimate = 0.019, p = 0.116).ConclusionImplementation of CR following PCI in patients with AMI is beneficial. However, in AMI patients, there is no significant difference in the improvement of CR outcomes based on different CR starting times within 1 month after PCI or different durations of the CR programs. It indicates that it is feasible for patients with AMI to commence CR within 1 month after PCI and continue long-term CR, but the time factors which impact CR are intricate and further clinical research is still needed to determine the optimal initiation time and duration of CR.

Correlation of Left Ventricular Diastolic Function with the Clinical Course and Outcome of Acute Myocardial Infarction: A Brief Review

Acute myocardial infarction (AMI) remains a leading cause of morbidity and mortality globally, posing significant challenges in cardiology and internal medicine. AMI is characterized by the sudden interruption of blood flow to a portion of the myocardium, resulting in ischemic injury and myocardial necrosis. This condition presents a wide range of clinical manifestations, from asymptomatic cases to severe complications. Advances in treatment underscore the need for a comprehensive understanding of AMI's path physiology and prognostic indicators to improve patient outcomes. One crucial aspect of myocardial function impacted by AMI is left ventricular diastolic function (LVDF), which involves the heart's ability to relax and fill with blood during diastole. Impaired LVDF can be an early sign of myocardial injury and is a significant determinant of clinical outcomes post-AMI. Ischemic damage to the myocardium can lead to changes in LVDF, affecting relaxation, ventricular filling, and myocardial stiffness, thereby influencing the overall prognosis. Research links LV diastolic dysfunction (LVDD) with various adverse clinical outcomes in AMI patients, including exacerbated heart failure symptoms, adverse ventricular remodeling, and increased risk of chronic heart failure and cardiovascular mortality. Echocardiography, particularly Doppler imaging, is vital for assessing LVDF, with the E/A and E/e' ratios serving as key parameters. An abnormal E/A ratio suggests impaired LV relaxation or increased stiffness, while an elevated E/e' ratio indicates increased LV filling pressures (LVFP) and is associated with worse outcomes. Studies have shown that elevated E/e' ratios predict higher left atrial pressures and increased heart failure risk, correlating with prolonged hospitalization and higher mortality in AMI patients. Conversely, normalization of diastolic parameters can indicate a positive response to therapy and improved recovery. In conclusion, assessing LVDF through echocardiographic parameters like the E/A and E/e' ratios is essential in managing AMI patients. These measures provide valuable insights into LVFP and LVDF, crucial for understanding AMI's clinical course and optimizing patient care. Ongoing research and clinical application of these parameters are vital for enhancing prognostic accuracy and treatment strategies for AMI.

Glycated Haemoglobin and TIMI Score as Risk Predictor in Patients with Acute Myocardial Infarction: A Cross-sectional Study

Introduction: Cardiovascular Disease (CVD) is the leading cause of death and disability globally. The Thrombolysis in Myocardial Infarction (TIMI) score is calculated to assess the risk outcome among myocardial infarction patients. Researchers found that diabetic patients with myocardial infarction have relatively unfavourable outcomes when compared to myocardial infarction patients without diabetes. Aim: To evaluate Glycated Haemoglobin (HbA1c) levels, the TIMI score in Acute Myocardial Infarction (AMI) patients and compare them between ST Elevation Myocardial Infarction (STEMI) and non STEMI (NSTEMI) patients. Materials and Methods: This cross-sectional study was conducted at the Intensive Care Unit (ICU) of the Department of Cardiology at SRM Medical College Hospital and Research Centre, Kattankulathur, Chengalpattu, Tamil Nadu, India, from July 2022 to June 2023. A total of 100 myocardial infarction patients were included and divided into two groups based on Electrocardiogram (ECG) findings and Creatine PhosphokinaseMB (CK-MB) values, with 50 STEMI and 50 NSTEMI. Patients blood samples were evaluated for HbA1c, total cholesterol, Triglycerides (TGL), High-density Lipoprotein Cholesterol (HDL-C), Low-density Lipoprotein Cholesterol (LDL-C), Very High-density Lipoprotein Cholesterol (VLDL-C), and CK-MB parameters. The TIMI score was calculated to evaluate the risk of developing complications among myocardial infarction patients. Pearson’s correlation was used to correlate biochemical parameters with the TIMI score. Results: A total of 100 myocardial infarction patients were analysed in the present study, with 50 being STEMI (mean HbA1c%: 8.0±0.2.8) and 50 being NSTEMI (mean HbA1c%: 7.2±2.0) with a p-value of &lt;0.01*, a high TIMI score in STEMI patients (means 5.38±2.76) and 50 NSTEMI (mean 3.24±1.20) with a p-value of &lt;0.0001*. Also, HbA1c was strongly positively correlated with the TIMI score in both the STEMI and NSTEMI groups, with r-value of 0.6 (p=0.0001*) and 0.7 (p=0.0001*), respectively. CK-MB was correlated with the TIMI score in both STEMI and NSTEMI, with r-value of 0.308 (0.03) and 0.375 (0.007). There was no correlation between the TIMI score and the lipid profile. Conclusion: The study concluded that HbA1c, along with the TIMI score, is a significant predictor of risk outcome in AMI patients.

Analysis of health outcomes in acute myocardial infarction: A value-based healthcare approach

Introduction: Understanding the impact of value-based healthcare and various healthcare payment models on the health outcomes of patients with acute myocardial infarction (AMI) is pivotal for guiding clinical strategies and decisions. Objective: To compare health outcomes and costs associated with healthcare for AMI patients under insurance prospective global payment (PGP) and fee-for-service models. Materials and Methods: A retrospective cohort study encompassing AMI patients was conducted from 2021-2023. Convenience sampling of participants over 18 years of age diagnosed with type 2 myocardial infarction was conducted. Analysis was based on Colombian healthcare system payment models: PGP and fee-for-service. Results: The study involved 2134 patients, 657 (31%) under PGP and 1477 (69%) under fee-for-service. Length of hospital stay was associated with the payment model (coefficient -0.68, CI 95%: 0.40 to 0.98, p=0.037). Payment models also correlated with costs (845 USD, CI 95%: 87.92 to 1601; p=0.02 ). In-hospital mortality is not associated with either of the two contracting models. Quality-adjusted life years (QALYs) totaled 1.6 over a 2-year follow-up. Discussion: It is evident that throughout the care cycle at the Center of Excellence for Acute Myocardial Infarction, there is added value for patients with the PGP model, as the costs are lower and health outcomes comparable to the fee-for-service model. Conclusions: The findings of this study underscore the importance of understanding the relationship between value-based healthcare, different healthcare payment models, and health outcomes in AMI patients.

Clinical outcomes of acute myocardial infarction arising from non-lipid-rich plaque determined by NIRS-IVUS

Acute myocardial infarction (AMI) can rarely arise from non-lipid-rich coronary plaques. This study sought to compare the clinical outcomes after percutaneous coronary intervention (PCI) between AMI showing maximum lipid-core burden index in 4 mm (maxLCBI4mm) < 400 and ≥ 400 in the infarct-related lesions assessed by near-infrared spectroscopy-intravascular ultrasound (NIRS-IVUS). We investigated 426 AMI patients who underwent NIRS-IVUS in the infarct-related lesions before PCI. Major adverse cardiovascular events (MACE) were defined as the composite of cardiac death, non-fatal MI, clinically driven target lesion revascularization (TLR), clinically driven non-TLR, and congestive heart failure requiring hospitalization. 107 (25%) patients had infarct-related lesions of maxLCBI4mm < 400, and 319 (75%) patients had those of maxLCBI4mm ≥ 400. The maxLCBI4mm < 400 group had a younger median age at onset (68 years [IQR: 57–78 years] vs. 73 years [IQR: 64–80 years], P = 0.007), less frequent multivessel disease (39% vs. 51%, P = 0.029), less frequent TIMI flow grade 0 or 1 before PCI (62% vs. 75%, P = 0.007), and less frequent no-reflow immediately after PCI (5% vs. 11%, P = 0.039). During a median follow-up period of 31 months [IQR: 19–48 months], the frequency of MACE was significantly lower in the maxLCBI4mm < 400 group compared with the maxLCBI4mm ≥ 400 group (4.7% vs. 17.2%, P = 0.001). MaxLCBI4mm < 400 was an independent predictor of MACE-free survival at multivariable analysis (hazard ratio: 0.36 [confidence interval: 0.13–0.98], P = 0.046). MaxLCBI4mm < 400 measured by NIRS in the infract-related lesions before PCI was associated with better long-term clinical outcomes in AMI patients.

Association between admission heart rate and major adverse cardiovascular events in acute myocardial infarction participants with different left ventricular ejection fraction

BackgroundThis study intended to investigate the independent effect of admission heart rate (HR) on the risk of major adverse cardiovascular events (MACEs) in acute myocardial infarction (AMI) patients with different left ventricular ejection fraction (LVEF) levels. MethodsThe study was a secondary analysis of the Acute Coronary Syndrome Quality Improvement in Kerela Trial. The relationship between admission HR and 30-day adverse outcomes in AMI patients with different LVEF levels was detected using a Logistic regression model. Interaction tests were used to compare the effects of different subgroups on HR and MACEs. ResultsOur study enrolled 18,819 patients. In both partially and fully adjusted models (Model1 and Model2), the risk of MACEs was highest in patients with HR ≥ 120 (OR: 1.62, 95%CI: (1.16, 2.26), P = 0.004, Model1; OR: 1.46, 95%CI: (1.00, 2.12), P = 0.047, Model2). There was a significant interaction between LVEF and HR (P for interaction = 0.003). Meanwhile, the trend test for this association showed that HR was positively and significantly associated with the MACEs in LVEF≥40% group (OR (95%CI): 1.27 (1.12, 1.45), P < 0.001). However, in LVEF<40% group, the trend test was not statistically significant (OR (95%CI): 1.09 (0.93, 1.29), P = 0.269). ConclusionThis study found that elevated admission HR was associated with a significantly higher risk for MACEs in patients admitted with AMI. Elevated admission HR was significantly associated with the risk of MACEs in AMI patients without low LVEF but not those with low LVEF (<40%). LVEF levels should be considered when evaluating the association between admission HR and the prognosis of AMI patients in the future.

The ratio of QRS/RV6-V1: a new electrocardiographic predictor of short- and long-term adverse clinical outcomes in patients with acute myocardial infarction combined with new-onset right bundle branch block.

A few studies have focused on electrocardiography (ECG) parameters correlating with clinical prognosis in patients with acute myocardial infarction (AMI) combined with new-onset right bundle branch block (RBBB). To assess the prognostic value of a new ECG parameter, namely, the ratio of QRS duration/RV6-V1 interval (QRS/RV6-V1), in patients with AMI combined with new-onset RBBB. A total of 272 AMI patients combined with new-onset RBBB who received primary percutaneous coronary intervention (P-PCI) were retrospectively enrolled in the study. First, the patients were divided into survival group and non-survival group. Demographic, angiographic, and ECG characteristics were compared between the two groups. Receiver operating characteristic (ROC) curve was used to screen the best ECG parameter for predicting 1-year mortality. Second, the ratio of QRS/RV6-V1, a continuous variable, was converted to the high ratio group and low ratio group according to the optimal cutoff value point determined by the X-tile software. We compared the patient's demographic, angiographic, and ECG characteristics, in-hospital major adverse cardiovascular events (MACE), and 1-year mortality between the two groups. Multivariate logistic and Cox regressions were used to evaluate whether the ratio of QRS/RV6-V1 was an independent prognostic factor of in-hospital MACE and 1-year mortality. The ROC curve showed that the ratio of QRS/RV6-V1 had a higher value for predicting in-hospital MACE and 1-year mortality than the QRS duration, RV6-V1 interval, and RV1 interval. The patients in the high ratio group had significantly higher CK-MB peak and Killip class, lower ejection fraction (EF%), higher ratio of the left anterior (LAD) descending artery as infarct-related artery (IRA), and longer total ischemia time (TIT) than those in the low ratio group. The QRS duration was wider in the high ratio group than that in the low ratio group, whereas RV6-V1 was narrower in the high ratio group compared with that in the low ratio group. The in-hospital MACE rate (93.3% vs. 31.0%, p < 0.001) and 1-year mortality rate (86.7% vs. 13.2%, p < 0.001) in the high ratio group were higher than those in the low ratio group. The higher ratio of QRS/RV6-V1 was an independent predictor of in-hospital MACE (odds ratio, 8.55; 95% CI, 1.40-52.37; p = 0.02) after adjusting other confounders. Cox regression showed that the higher ratio of QRS/RV6-V1 predicted higher 1-year mortality of the patients with AMI combined with new-onset RBBB [hazard ratios (HR), 12.4; 95% CI, 7.26-21.22); p < 0.001] than the lower ratio of QRS/RV6-V1, and the HR still stayed at 2.21 even after a multivariable adjustment (HR, 2.21; 95% CI, 1.05-4.64); p = 0.037). According to the results of our study, the high ratio of QRS/RV6-V1 (>3.0) was a valuable predictor of short- and long-term adverse clinical outcomes in AMI patients combined with new-onset RBBB. The implications of the high ratio of QRS/RV6-V1 were severe ischemia and pseudo synchronization between bi-ventricle.

An integrated signature of extracellular matrix proteins and a diastolic function imaging parameter predicts post-MI long-term outcomes.

Patients suffering from acute myocardial infarction (AMI) are at risk of secondary outcomes including major adverse cardiovascular events (MACE) and heart failure (HF). Comprehensive molecular phenotyping and cardiac imaging during the post-discharge time window may provide cues for risk stratification for the outcomes. In a prospective AMI cohort in New Zealand (N = 464), we measured plasma proteins and lipids 30 days after hospital discharge and inferred a unified partial correlation network with echocardiographic variables and established clinical biomarkers (creatinine, c-reactive protein, cardiac troponin I and natriuretic peptides). Using a network-based data integration approach (iOmicsPASS+), we identified predictive signatures of long-term secondary outcomes based on plasma protein, lipid, imaging markers and clinical biomarkers and assessed the prognostic potential in an independent cohort from Singapore (N = 190). The post-discharge levels of plasma proteins and lipids showed strong correlations within each molecular type, reflecting concerted homeostatic regulation after primary MI events. However, the two molecular types were largely independent with distinct correlation structures with established prognostic imaging parameters and clinical biomarkers. To deal with massively correlated predictive features, we used iOmicsPASS + to identify subnetwork signatures of 211 and 189 data features (nodes) predictive of MACE and HF events, respectively (160 overlapping). The predictive features were primarily imaging parameters, including left ventricular and atrial parameters, tissue Doppler parameters, and proteins involved in extracellular matrix (ECM) organization, cell differentiation, chemotaxis, and inflammation. The network signatures contained plasma protein pairs with area-under-the-curve (AUC) values up to 0.74 for HF prediction in the validation cohort, but the pair of NT-proBNP and fibulin-3 (EFEMP1) was the best predictor (AUC = 0.80). This suggests that there were a handful of plasma proteins with mechanistic and functional roles in predisposing patients to the secondary outcomes, although they may be weaker prognostic markers than natriuretic peptides individually. Among those, the diastolic function parameter (E/e' - an indicator of left ventricular filling pressure) and two ECM proteins, EFEMP1 and follistatin-like 3 (FSTL3) showed comparable performance to NT-proBNP and outperformed left ventricular measures as benchmark prognostic factors for post-MI HF. Post-discharge levels of E/e', EFEMP1 and FSTL3 are promising complementary markers of secondary adverse outcomes in AMI patients.

The initial timing and dosage pattern of sacubitril/valsartan in patients with acute myocardial infarction undergoing percutaneous coronary intervention

BackgroundIn real-world clinical practice, the initiation and up-titration of sacubitril/valsartan remain challenging due to symptomatic hypotension in patients with acute myocardial infarction(AMI). The purpose of this study was to investigate the efficacy of different initial timing and dosage of sacubitril/valsartan in AMI patients. MethodsThis prospective and observational cohort study enrolled AMI patients treated with percutaneous coronary intervention(PCI), and were categorized according to the initial timing and average daily doses of sacubitril/valsartan prescription. The primary endpoint was defined as a composite of cardiovascular death, recurrent AMI, coronary revascularization, heart failure(HF) hospitalization and ischaemic stroke. Secondary outcomes included the new-onset HF, and the composite endpoints in AMI patients complicated with HF at baseline. ResultsThe study population consisted of 915 AMI patients. After a median follow-up of 38 months, early use or high dosage of sacubitril/valsartan was associated with an improvement in primary endpoint as well as the incidence of new-onset HF. Early use of sacubitril/valsartan also ameliorated the primary endpoint in AMI patients with left ventricular ejection fraction(LVEF) ≤50% as well as LVEF>50%. Besides, early use of sacubitril/valsartan improved the clinical outcomes in AMI patients complicated with HF at baseline. The low dose was well tolerated and may be associated with similar outcomes compared with high dose under some circumstances(LVEF>50% or HF at baseline). ConclusionsEarly use or high dosage of sacubitril/valsartan medication is associated with an improvement in clinical outcome. The low dose of sacubitril/valsartan is well tolerated and may be an acceptable alternative strategy.

Interaction between Acute Hepatic Injury and Early Coagulation Dysfunction on Mortality in Patients with Acute Myocardial Infarction

In acute myocardial infarction (AMI), acute hepatic injury is an independent risk factor for prognosis and is associated with complex coagulation dynamics. This study aims to determine the interaction between acute hepatic injury and coagulation dysfunction on outcomes in AMI patients. The Medical Information Mart for Intensive Care (MIMIC-III) database was used to identify AMI patients who underwent liver function testing within 24 h of admission. After ruling out previous hepatic injury, patients were divided into the hepatic injury group and the nonhepatic injury group based on whether the alanine transaminase (ALT) level at admission was >3 times the upper limit of normal (ULN). The primary outcome was intensive care unit (ICU) mortality. Among 703 AMI patients (67.994% male, median age 65.139 years (55.757-76.859)), acute hepatic injury occurred in 15.220% (n = 107). Compared with the nonhepatic injury group, patients with hepatic injury had a higher Elixhauser comorbidity index (ECI) score (12 (6-18) vs. 7 (1-12), p < 0.001) and more severe coagulation dysfunction (85.047% vs. 68.960%, p < 0.001). In addition, acute hepatic injury was associated with increased in-hospital mortality (odds ratio (OR) = 3.906; 95% CI: 2.053-7.433; p < 0.001), ICU mortality (OR = 4.866; 95% CI: 2.489-9.514; p < 0.001), 28-day mortality (OR = 4.129; 95% CI: 2.215-7.695; p < 0.001) and 90-day mortality (OR = 3.407; 95% CI: 1.883-6.165; p < 0.001) only in patients with coagulation disorder but not with normal coagulation. Unlike patients with coagulation disorder and normal liver, patients with both coagulation disorder and acute hepatic injury had greater odds of ICU mortality (OR = 8.565; 95% CI: 3.467-21.160; p < 0.001) than those with normal coagulation. The effects of acute hepatic injury on prognosis are likely to be modulated by early coagulation disorder in AMI patients.

The Performance of Risk Scores for Bleeding and Ischemia as Outcome Predictors in Acute Myocardial Infarction Patients with End-Stage Renal Disease.

In patients with end-stage renal disease (ESRD), acute myocardial infarction (AMI) increases the risks of cardiovascular events, death, and bleeding. Several scores have been developed for predicting ischemic and bleeding outcomes in AMI patients, but none have been validated specifically for ESRD patients. To compare and validate different risk scores as predictors of ischemic and bleeding outcomes in AMI patients with ESRD. This retrospective study enrolled 340 patients who had received percutaneous coronary intervention for AMI while undergoing maintenance hemodialysis for ESRD. Ischemic risk scores (TIMI-STEMI, TIMI-NSTEMI, GRACE, DAPT) and bleeding risk scores (PRECISE-DAPT, CRUSADE, ACUITY, ACTION, SWEDEHEART) were calculated. The ischemic outcome mainly focused on major adverse cardiovascular events (MACEs) within 14 days after hospitalization, and the bleeding outcome was 14-day major bleeding according to the CRUSADE criteria. The GRACE score was superior in discriminating ischemic outcomes, especially in 14-day MACEs [area under curve (AUC) 0.791, p < 0.001]. None of the scores could ideally discriminate 14-day CRUSADE major bleeding, while the PRECISE- DAPT score had the best discriminative power (AUC 0.636, p < 0.001). Either GRACE score > 222 or PRECISE-DAPT score > 48 was associated with higher net adverse cardiovascular events (a composite of 14-day MACEs and 14-day CRUSADE major bleeding). In AMI patients with ESRD, the GRACE score can effectively discriminate the risk of short-term ischemic events. None of the scores could ideally discriminate the bleeding risk, but a high PRECISE-DAPT score still represented a higher rate of bleeding events.