Recurrent Acute Myocardial Infarction Research Articles

Associated Demographic Factors for the Recurrence and Prognosis of Stroke Patients within a Multi-Ethnic Asian Population.

There is a paucity of studies investigating the outcomes amongst Asian stroke patients. Identifying subgroups of stroke patients at risk of poorer outcomes could identify patients who would benefit from targeted interventions. Therefore, the aim of this study was to identify which ischemic stroke patients at high risk of recurrent events and mortality. This cohort study adhered to STrengthening the Reporting of OBservational studies in Epidemiology (STROBE) guidelines. We obtained data from the Singapore Stroke Registry (SSR) from 2005 to 2016 and cross referenced to the Death Registry, Myocardial Infarction Registry. Outcome measures included recurrent stroke, acute myocardial infarction (AMI), all-cause and stroke-related deaths. Multivariable Cox proportional hazards regression models were performed to determine risk factors for recurrent stroke, AMI, all-cause and stroke-related deaths. A total of 64,915 patients (6,705 young, and 58,210 older) were included in our analysis. Older stroke patients were found to have an increased risk of recurrent stroke (HR = 1.21, 95%CI: 1.12-1.30), AMI (HR = 1.73, 95%CI: 1.54-1.95), all-cause death (HR = 2.49, 95%CI: 2.34-2.64) and stroke-related death (HR = 176, 95%CI: 1.61-1.92). Amongst young stroke patients, males were at increased risk for recurrent stroke (HR = 1.18, 95%CI: 1.01-1.39) and AMI (HR = 1.41, 95%CI: 1.08-1.83), but at reduced risk for all-cause (HR = 0.78, 95%CI: 0.69-0.89) and stroke-related death (HR = 0.79, 95%CI: 0.67-0.94). Ethnicity appeared to influence outcomes, with Malay patients at increased risk of recurrent stroke (HR = 1.37, 95%CI: 1.14-1.65), AMI (HR = 2.45, 95%CI: 1.87-3.22), all-cause (HR = 1.43, 95%CI: 1.24-1.66) and stroke-related deaths (HR = 1.34, 95%CI: 1.09-1.64). Indian patients were also at increased risk of AMI (HR = 1.96, 95%CI: 1.41-2.72). Similar findings were seen amongst the older stroke patients. This study found that older stroke patients are at risk of poorer outcomes. Within the young stroke population specifically, males were predisposed to recurrent stroke and AMI but were protected against all-cause and stroke-related deaths. Males were also at reduced risk of all-cause and stroke-related deaths in the older stroke population. Additionally, Malay and Indian patients experience poorer outcomes after first stroke. Further optimisation of risk factors targeting these high-priority populations are needed to achieve high quality care.

Stratification of arrhythmic risk in patients admitted for acute coronary syndrome: the role of the machine learning-derived PRAISE score

Abstract Funding Acknowledgements None. Background Patients with acute coronary syndrome (ACS) have a high arrhythmic burden, and either ventricular and supraventricular arrhythmias are very common during hospitalization[1]. Patients who develop arrhythmias show higher mortality and worse prognosis. The PRAISE (Prediction of Adverse Events Following an Acute Coronary Syndrome) score is a machine-learning based model for predicting 1-year all cause death, recurrent acute myocardial infarction and major bleedings in patients after ACS[2]. To date, its role to predict arrhythmic complications in ACS remains unknown. Purpose We hypothesized that patients with higher PRAISE score have a higher arrhythmic burden. Aim was to evaluate in a prospective protocol the PRAISE score capability for identifying patients with ACS at higher risk of arrhythmic complications during in-hospital stay. Methods A total of 365 consecutive patients admitted to our cardiac intensive care unit for ACS and undergoing percutaneous coronary intervention were enrolled. All patient was monitored by continuous electrocardiogram during hospitalization. The PRAISE score was obtained for each patient <24 hours from admission. Patients were divided into 2 groups based on the results of the PRAISE score for all-cause of death as patients without high PRAISE score (e.g. with low to intermediate risk, n=350) and patients with high PRAISE score (e.g. with high risk, n=15). The occurrence of atrial fibrillation (AF) and ventricular arrhythmias (VAs) up to discharge was recorded. AF was defined by detection of at least one episode of uncoordinated atrial electrical activation and irregular R-R intervals, in absence of distinct repeating P waves and with irregular atrial activations lasting at least 5 minutes. We considered as VAs all episodes of ventricular non-sustained tachycardia, sustained ventricular tachycardia and ventricular fibrillation. Results ROC curve analysis indicated a significant relationship between high PRAISE score and risk of both in-hospital AF (AUC 0.89, 95%CI 0.82-0.94, p=0.0001) and VAs (AUC 0.69, 95%CI 0.64-0.75, p=0.0001). A high PRAISE score had a specificity of 99% for AF and 92% for VAs. By Kaplan-Meier analysis, patients with high PRAISE score more frequently developed AF (30% vs 4% in those without high score; log rank p=0.00001) and VAs (77% vs 35%; log rank p=0.00001). Multivariate analysis showed that a high PRAISE score was an independent predictor of both AF (HR 4.08, 95%CI 1.14-14.58, p=0.030) and VAs (HR 2.36, 95%CI 1.08-5.14, p=0.030). Conclusions In patients hospitalized for ACS, the PRAISE score has a comprehensive capability to identify with high specificity those patients prone to develop arrhythmic events during hospitalization. This may be important in order to stratify patients with higher arrhythmic risk in whom individualized strategies may improve the clinical outcome.Baseline features of the populationKaplan-Meier anaysis

Avaliable data for adverce cardiac events prognostication after ST segment elevation myocardial infarction

The treatment of acute myocardial infarction (AMI) is aimed at the long‑term survival of patients, so attention should be given to predicting adverse outcomes, specifically the development of heart failure, recurrent AMI, cardiovascular death, and so on. The combination of various data obtained in recent decades has helped improve prognosis, but challenges with long‑term survival after ST segment elevation myocardial infarction (STEMI) still exist.
 Objective — to find the optimal combination of data collected from patients with STEMI and prospectively analyzed during one‑year observation to improve the quality of prognostication.
 Materials and methods. One hundred and twenty‑eight enrolled patients visited research center to clinical examination and estimation of left ventricular (LV) function in 365±14 days follow up period after STEMI. End points such as major adverce cardiac events (MACE) — composite of cardiovascular death, recurrent MI, newly diagnosed heart failure, rhythm, and conduction disturbances were estimated. Primary percutaneous coronary intervention was successful, and all included patients had TIMI (Thrombolysis In Myocardial Infarction) >2. Patients was divided into two cohorts depending on the presence of MACE: global longitudinal strain and mechanical dispersion are independent factors of it (p=0.0006 and p <0.0001respectively).
 Results. We found the optimal combination of different data for prognostication of adverce outcome after 1 year after STEMI, among them occurred global longitudinal strain, left atrium volume index, left ventricular end diastolic diameter, mechanical dispersion, LV ejection fraction. They all reflect different hemodynamic sides of LV remodeling after STEMI.
 Conclusions. The model is simple and avaliable for use in medical practice.

Clinical Application of Cardiac Rehabilitation Program Based on Self-efficacy Theory in Patients with Acute Myocardial Infarction Undergoing Percutaneous Transluminal Coronary Intervention

Objective: This study aimed to evaluate the effectiveness of a cardiac rehabilitation program based on self-efficacy theory in patients with acute myocardial infarction (AMI) undergoing percutaneous transluminal coronary intervention (PCI). Methods: A retrospective analysis was conducted on the medical records of 417 patients with AMI who underwent PCI at our hospital from May 2020 to May 2022. Patients were categorized into a control group (210 patients following a cardiac rehabilitation program) and an observation group (207 patients following a cardiac rehabilitation scheme based on self-efficacy theory). Data on demographics, diseases, and 1-year follow-up information were collected from the participants. Comparisons between the groups were made in terms of left ventricular ejection fraction (LVEF), six-minute walk distance test (6MWD), hospitalization duration, the 36-item short-form health survey (SF-36) score, and the incidence of angina pectoris and AMI recurrence within one-year post-management. Results: Initially, the groups had no significant difference in LVEF and 6MWD (p > 0.05). However, after 1 and 3 months of management, the observation group exhibited higher LVEF and 6MWD than the control group (p < 0.001). The observation group had a significantly shorter hospitalization duration (p < 0.001) and higher SF-36 scores post-management (p < 0.001). Furthermore, the incidence of angina pectoris and AMI recurrence within a year post-management was lower in the observation group (p < 0.05). Conclusion: The cardiac rehabilitation program grounded in self-efficacy theory significantly improves cardiac function in patients with AMI, accelerates their post-PCI rehabilitation, improves quality of life, and reduces the recurrence of angina pectoris and AMI. This approach offers new directions for cardiac rehabilitation management of AMI.

Non-stenotic fibro-calcific aortic valve as a predictor of myocardial infarction recurrence.

Patients with acute myocardial infarction (AMI) are at increased risk of recurrent cardiovascular events. Non-stenotic aortic valve fibro-calcific remodeling (AVSc), reflecting systemic damage, may serve as a new marker of risk. To stratify subgroups of AMI patients with specific probabilities of recurrent AMI and to evaluate the importance of AVSc in this setting. Consecutive AMI patients (n = 2530) were admitted at Centro Cardiologico Monzino (2010-2019) and followed up for 5 years. Patients were divided into study (n = 1070) and test (n = 966) cohorts. Topological data analysis (TDA) was used to stratify patient subgroups, while Kaplan-Meier and Cox regressions analyses were used to evaluate the significance of baseline characteristics. TDA identified 11 subgroups of AMI patients with specific baseline characteristics. Two subgroups showed the highest rate of reinfarction after 5 years from the indexed AMI with a combined hazard ratio (HR) of 3.8 (95%CI: 2.7-5.4) compared to the other subgroups. This was confirmed in the test cohort (HR = 3.1; 95%CI: 2.2-4.3). These two subgroups were mostly men, with hypertension and dyslipidemia, who exhibit higher prevalence of AVSc, higher levels of high-sensitive c-reactive protein and creatinine. In the year-by-year analysis, AVSc, adjusted for all confounders, showed an independent association with the increased risk of reinfarction (odds ratio of ∼2 at all time-points), in both the study and the test cohorts (all p < 0.01). AVSc is a crucial variable for identifying AMI patients at high risk of recurrent AMI and its presence should be considered when assessing the management of AMI patients. The inclusion of AVSc in risk stratification models may improve the accuracy of predicting the likelihood of recurrent AMI, leading to more personalized treatment decisions.

Study of the course of recurrent myocardial infarction in the acute stage within the framework the hospital register

Aim. To study the features of the course of primary and recurrent myocardial infarction and compare their prognosis in the acute stage of the disease within the framework of the hospital register of the vascular center.Material and methods. The data from the acute coronary syndrome register of N. V. Sklifosovsky Research Institute for Emergency Medicine were used. The inclusion criteria were: transmural acute myocardial infarction (AMI) with ST-segment elevation (codes I21.0-I21.3 according to the International Classification of Diseases); permanent residence in Moscow and the Moscow region. The described part of the study included all patients with transmural myocardial infarction (codes I21.0-I.21.3) admitted from January 1, 2017 to December 31, 2017. Of the AMI patients admitted during this period (n=329), 214 met the inclusion criteria, with primary AMI in 153 and recurrent AMI in 61.Results. Patients with recurrent AMI were significantly older, more often had a disability group. Smoking and arterial hypertension were more frequent risk factors among patients with recurrent AMI than in primary AMI. All indices reflecting the severity of coronary artery disease and its complications were also significantly more common in the group with recurrent AMI. Diabetes mellitus was more common in these patients. Taking medications before hospitalization, as well as the regularity of this intake, were significantly more common in patients who had repeated AMI. The mortality rate of patients with recurrent AMI was 4.6 times higher than that of patients with primary AMI. Such complications as atrial fibrillation and flutter, intracardiac conduction disturbance requiring temporary endocardial stimulator placement, acute heart failure requiring intra-aortic balloon counterpulsation, respiratory failure requiring artificial ventilation, cardiogenic shock were significantly more common in patients with recurrent AMI. Kaplan-Meyer curves clearly demonstrate the differences in hospital mortality among the two groups of patients. These curves also clearly show that patients with primary AMI died mostly in the first days of the disease, but patients with recurrent AMI could die at a much later date, up to 12 days after admission. Analysis of factors determining the mortality risk during hospitalization showed that recurrent AMI is an independent predictor of death.Conclusion. The results of our work indicate the need for prompt identification of patients who had previously undergone AMI upon their admission to the vascular center, as well as the development of more active prevention tactics for such patients.

Safety and Efficacy of Early SGLT2 Inhibitors Initiation in Diabetic Patients Following Acute Myocardial Infarction, a Retrospective Study.

Sodium-glucose cotransporter- 2 (SGLT2) inhibitors have become a cornerstone in heart failure (HF), Type 2 diabetes mellitus (T2DM), and cardiovascular disease (CVD) management. In the current retrospective study, we aimed to assess efficacy and safety of SGLT2 inhibitors early following acute myocardial infarction (AMI). Patients with T2DM hospitalized for AMI in 2017-2020 were divided according to SGLT2 inhibitors therapy status on discharge (with vs without therapy). Primary outcome was defined as a composite of hospitalizations for HF, recurrent AMI, and cerebrovascular accident (CVA). Secondary outcomes included hospitalizations for any cause, total cumulative number of hospitalizations, and all-cause mortality. A total of 69 patients (mean age 59.2 ± 8.2 years) with AMI discharged with SGLT2 inhibitors were compared to 253 patients (mean age 62.5 ± 9.8) with no SGLT2 inhibitors. During the first year post-AMI, 4 (5.8%) patients in the treatment group and 16 (6.3%) in the control group were hospitalized for CV events (p = 1.0). Patients in the SGLT2 inhibitors group had lower rates of hospitalization for any cause (31.9% vs 47.8%, P = 0.02), with no change in mortality (0% vs 3.6%, P = 0.21). After multivariate regression analysis, only female gender was associated with increased risk for readmission, mainly due to urinary tract infections. No events of diabetic ketoacidosis (DKA) or limb amputation were reported. We found that early initiation of SGLT2 inhibitors in T2DM patients following AMI is safe and decreases the risk of hospitalization for any cause.

Incidence and case fatality of acute myocardial infarction in Korea, 2011-2020.

Cardiovascular diseases are a leading cause of mortality worldwide, and acute myocardial infarction (AMI) is particularly fatal condition. We evaluated the incidence and case fatality rates of AMI in Korea from 2011 to 2020. We utilized data from the National Health Insurance Services to calculate crude, age-standardized, and age-specific incidence rates, along with 30-day and 1-year case fatality rates, of AMI from 2011 to 2020. Age-standardized incidence rates were determined using direct standardization to the 2005 population. The crude incidence rate of AMI per 100,000 person-years consistently increased from 44.7 in 2011 to 68.3 in 2019, before decreasing slightly to 66.2 in 2020. The age-standardized incidence rate of AMI displayed a 19% rise from 2011 to 2019, followed by a slight decline in 2020. The increasing trend for AMI incidence was more pronounced in males than in females. Both 30-day and 1-year case fatality rates remained stable among younger individuals but showed a decrease among older individuals. There was a minor surge in case fatality in 2020, particularly among recurrent AMI cases. Over the past decade, the AMI incidence rate in Korea has consistently increased, with a slight downturn in 2020. The case fatality rate has remained relatively stable except for a minor increase in 2020. This study provides data for continuous surveillance, the implementation of targeted interventions, and the advancement of research aimed at AMI in Korea.

Impact of gender-related differences in outcomes in acute myocardial infarction: non-obstructive coronary arteries versus obstructive coronary arteries

Abstract Background Myocardial Infarction with Non-Obstructive Coronary Arteries (MINOCA) represents 6-10% of acute myocardial infarction (AMI) and is more prevalent in females. The impact of gender on the outcomes of MINOCA patients has been poorly understood. Purpose To evaluate the impact of gender on the prognosis of MINOCA. Methods We enrolled 2455 patients with AMI undergoing coronary angiography from January 2016 to June 2021. Patients were divided according to type of AMI and gender: male (n=1593) and female (n=607) in AMI with obstructive coronary arteries (MIOCA); male (n=87) and female (n=168) in MINOCA. Each cohort was further stratified based on age (&amp;lt;=/&amp;gt; 70 years). The primary endpoint was a composite of all-cause death, recurrent AMI, and hospitalization for heart failure (MACE) at 5-year follow-up. Secondary outcomes included: all-cause and cardiovascular death, recurrent AMI, HF re-hospitalization and stroke. Results MINOCA patients were more likely to be females compared to MIOCA ones (p&amp;lt;0.001). The incidence of MACEs was significantly higher in females compared to males, both in MINOCA (p=0.018) and MIOCA cohorts (p=0.002). Age was an independent predictor of MACEs in both cohorts. No difference in outcomes was found comparing females to males &amp;gt;70 years, in both MINOCA and MIOCA. MINOCA females &amp;lt;70 years old had a higher incidence of MACEs (p=0.003), mainly driven by a higher prevalence of re-hospitalization for HF (p=0.045) and recurrence of AMI (p=0.006). Only in this sub-group of MINOCA patients, female gender was an independent predictor of MACEs (HR=3.09; 95%CI: 1.02-9.59; p=0.040). MINOCA females &amp;lt;70 years old had worse outcomes than MIOCA peers. Conclusion MINOCA females &amp;lt;70 years old had a significantly higher incidence of MACEs, compared to males and MIOCA peers, likely due to the different pathophysiology of the ischemic event.Survival curves in MINOCA and MIOCASurvival curves stratified for age

Effect of symptoms recognition in patients with recurrent acute myocardial infarction: from KRAMI-RCC

Abstract Background Clinical significance of self-recognition for myocardial infarction symptom in the general population has been well-known. However, evidence of self-recognition for ischemic symptoms in patients with recurrent myocardial infarction is limited. The study is aimed to verify the association between self-recognition and clinical characteristics, and clinical outcomes in patients with recurrent myocardial infarction. Method From 2016 to 2019, the Korean Registry of Acute Myocardial Infarction for Regional Cardiocerebrovascular Centers (KRAMI-RCC), a web-based registry for myocardial infarction in South Korea, was used. We divided into two groups based on self-recognition in questionnaire. Patient characteristics and clinical outcomes were analyzed. Result Among 11,894 MI patients, the rate of recurrent MI was 9.7%. The rate of self-recognition in subjects with first MI and recurrent MI was 14.4% and 52.0%, respectively (p&amp;lt;0.001). Patients without responses to the self-recognition questionnaire were excluded (n=86). Finally, enrolled subjects were 1,050. Males had a higher rate of self-recognition (79.3% vs. 69.0%). Younger patients, higher graduation levels, and living with a spouse were associated with the well-recognized symptoms. Chest pain, cold sweating, and radiating pain were related to being noticed as a symptom of MI. However, no difference of respiratory difficulties and stomachache in both groups was observed. The unrecognized group had more frequently occurred with cardiogenic shock and heart failure. A history of stroke and malignancy was associated with a low incidence of recognition. Patients with dyslipidemia had a high recognition rate. There was no difference of symptom recognition between ST elevation MI and non-ST elevation MI. Interestingly, previously registered patients in KRAMI-RCC were significantly associated with higher recognition. The symptom recognition was related to prompt visit in regional cardiovascular centers (57% vs. 47%, p=0.002). The in-hospital mortality rate in the unrecognized group was higher at 6.7% compared to the recognized group (1.5%, p&amp;lt;0.000). Unrecognized MI symptoms and a presentation with cardiogenic shock were independent predictors in multivariate analysis to predict a model for in-hospital mortality. Conclusion The MI symptom recognition rate was still low in patients with recurrent MI. Self-recognition of MI symptoms was an independent predictor for in-hospital mortality. In this study, it is thought that rapid symptom recognition might help patients with myocardial infarction visit the hospital as soon as possible, thereby reducing cardiogenic shock and death.Multivariable analysisSelf-recognition and Outcomes

Long term follow-up of patent foramen closure due to embolic infarction in elderly patients

Abstract Background In patients &amp;lt; 60 years (yrs) with crytogenic embolism associated with a patent foramen ovale (PFO) guidelines recommend interventional closure based on several randomized studies. There is no recommendation for elderly patients, although they seem to carry a similar risk for recurrent events. There are only scarce data on early and particularly late outcome. Methods We therefore retrospectively analyzed the up to 10 years outcome (median 4,2 yrs) in 444 consecutive patients (female, male) according to age at PFO closure. Results From 444 patients in our study population, 155 were &amp;gt;60 years of age (mean age 66,7 (IQR 63,1-71,74), 45% females. Older patients had higher prevalence of cardiovascular risk factors like hypertension, hyperlipidemia and diabetes (p&amp;lt; 0,01 for all vs. younger patients) while smoking was more prevalent in younger patients (p&amp;lt;0,01). No difference in procedural success and periinterventional complications was observed between the two age groups. During follow up of median 4,2 years (5 patients lost to FU) event rate of recurrent stroke, atrial fibrillation and acute myocardial infarction did not differ between older and younger patients. Conclusions Long term outcome was independent of age despite higher CV risk factors burden and supports PFO closure in elderly patients.

Lipoprotein(a) and Long-Term Recurrent Infarction After an Acute Myocardial Infarction

Lipoprotein(a) (Lp[a]) is an emerging risk factor for incident ischemic heart disease. However, its role in risk stratification in in-hospital survivors to an index acute myocardial infarction (AMI) is scarcer, especially for predicting the risk of long-term recurrent AMI. We aimed to assess the relation between Lp(a) and very long-term recurrent AMI after an index episode of AMI. It is a retrospective analysis that included 1,223 consecutive patients with an AMI discharged from October 2000 to June 2003 in a single-teaching center. Lp(a) was assessed during index admission in all cases. The relation between Lp(a) at discharge and total recurrent AMI was evaluated through negative binomial regression. The mean age of the patients was 67.0 ± 12.3years, 379 (31.0%) were women, and 394 (32.2%) were diabetic. The index event was more frequently non-ST-segment elevation myocardial infarction (66.0%). The median Lp(a) was 28.8 (11.8 to 63.4)mg/100ml. During a median follow-up of 9.9 (4.6 to 15.5)years, 813 (66.6%) deaths and 1,205 AMI in 532 patients (43.5%) occurred. Lp(a) values were not associated with an increased risk of long-term all-cause mortality (p=0.934). However, they were positively and nonlinearly associated with an increased risk of total long-term reinfarction (p=0.016). In the subgroup analysis, there was no evidence of a differential effect for the most prevalent subgroups. In conclusion, after an AMI, elevated Lp(a) values assessed during hospitalization were associated with an increased risk of recurrent reinfarction in the very long term. Further prospective studies are warranted to evaluate their clinical implications.

Characteristics of patients with recurrent acute myocardial infarction after MINOCA

BackgroundMyocardial infarction (MI) with non-obstructed coronary arteries (MINOCA) is an increasingly recognized condition with challenging management. Some MINOCA patients ultimately experience recurrent acute MI (re-AMI) during follow-up; however, clinical and angiographic factors predisposing to re-AMI are still poorly defined. MethodsIn this retrospective multicenter cohort study we enrolled consecutive patients fulfilling diagnostic criteria of MINOCA according to the IV universal definition of myocardial infarction; characteristics of patients experiencing re-AMI during the follow-up were compared to a group of MINOCA patients without re-AMI. Results54 patients (mean age 66 ± 13) experienced a subsequent re-AMI after MINOCA and follow-up was available in 44 (81%). Compared to MINOCA patients without re-AMI (n = 695), on first invasive coronary angiography (ICA) MINOCA patients with re-AMI showed less frequent angiographically normal coronaries (37 versus 53%, p = 0.032) and had a higher prevalence of atherosclerosis involving 3 vessels or left main stem (17% versus 8%, p = 0.049).Twenty-four patients (44%) with re-AMI underwent a new ICA: 25% had normal coronary arteries, 12.5% had mild luminal irregularities (<30%), 20.8% had moderate coronary atherosclerosis (30–49%), and 41.7% showed obstructive coronary atherosclerosis (≥50% stenosis).Among patients undergoing new ICA, atherosclerosis progression was observed in 11 (45.8%), 37.5% received revascularization, only 4.5% had low-density lipoprotein cholesterol (LDL_C) under 55 mg/dL and 33% experienced a new cardiovascular disease (CVD) event (death, AMI, heart failure, stroke) at subsequent follow-up. ConclusionsIn the present study, only a minority of MINOCA patients with re-AMI underwent a repeated ICA, nearly one out of two showed atherosclerosis progression, often requiring revascularization. Recommended LDL-C levels were achieved only in a minority of the cases, indicating a possible underestimation of CVD risk in this population.

Associations between urban exposome and recurrence risk among survivors of acute myocardial infarction in Beijing, China

Few previous studies have investigated the impacts of coexposure to multiple urban environmental factors on the prognosis of acute myocardial infarction (AMI) events. This study aimed to evaluate the associations between the urban exposome and AMI recurrence. We used data from 88,509 AMI patients from a large cohort obtained from the Beijing Cardiovascular Disease Surveillance System between 2013 and 2019. Twenty-six types of urban exposures were assessed within 300-m, 500-m, and 1000-m buffers of patients’ home addresses in the baseline and cumulative average levels. We used the Cox proportional hazard model along with the Elastic Net (ENET) algorithm to estimate the hazard ratios (HRs) of recurrent AMI per interquartile range increase in each selected urban exposure. The increased risk of AMI recurrence was significantly associated with lower urban function diversity in the 500-m buffer, longer distance to subway stations and higher PM2.5 for both baseline and cumulative average exposure. The cumulative averages of two urban factors, including the distance to parks, and the density of fruit and vegetable shops in the 1000-m buffer, were also identified as significant factors affecting the risk of AMI recurrence. These findings can help improve the urban design for promoting human cardiovascular health.

Paper-based multiplexed colorimetric biosensing of cardiac and lipid biomarkers integrated with machine learning for accurate acute myocardial infarction early diagnosis and prognosis

This study demonstrates how a colorimetric biosensor based on microfluidic paper can swiftly diagnose a disease and predict its prognosis to triage patients effectively. This was the first biosensor to quantify the gold standard cardiac troponin (cTnI) and lipid biomarkers, including high-density lipoprotein (HDL) and low-density lipoprotein (LDL) simultaneously. Prior research encountered obstacles or limitations, such as measuring a single biomarker or total cholesterol, which cannot distinguish between LDL and HDL. CatBoost, an advanced machine learning (ML) technique used for diagnosis that combines the predictive power of ML algorithms obtained an impressive area under the receiver operating curves (AUROC) of 0.97 ± 0.018 for all possible classification thresholds. CatBoost is a brand-new ensemble framework based on the interaction of multiple health parameters that can generate AUROC values of 0.897 ± 0.047 for the accurate prognosis of recurrent acute myocardial infarction (AMI), demonstrating remarkably accurate AMI diagnosis and prognosis. In addition, this paper-based analytical device (µPAD) biosensor employs an electrophoretic method to overcome the challenges posed by non-specific adsorption. This is accomplished by isolating non-specific biomolecules based on differences in their isoelectric points and removing non-specifically adsorbing colorimetric markers. The limits of detection (LoD) for cTnI in AMI were lower than their respective clinical cutoff values. This study also demonstrated that the proposed ML framework produced significantly better results than conventional statistical analysis. High correlation filtering and (t-SNE) dimensionality reduction were utilized for a limited number of data points. The respectable accuracy and AUROC of this method were also validated using cross-validation.

Twelve-Month Outcomes of Patients With Myocardial Injury not Due to Type-1 Myocardial Infarction.

Diagnosis of acute myocardial infarction (AMI) requires a combination of elevated cardiac troponins, and clinical or echocardiographic evidence of coronary ischaemia. Identification of patients with a high likelihood of coronary plaque rupture (Type 1 myocardial infarction [MI]) is crucial as it is these patients for whom coronary intervention has been well-established to provide benefit and reduce subsequent coronary ischemic events. However, high-sensitivity cardiac troponin (hs-cTn) assays have increasingly identified patients with hs-cTn elevations not due to Type 1 MI where recommendations for ongoing care are currently limited. Understanding the profile and clinical outcomes for these patients may inform the development of an emerging evidence-base. Using two previously published studies (hs-cTnT study n=1,937, RAPID-TnT study n=3,270) and the Fourth Universal Definition of MI, index presentations of patients to South Australian emergency departments with suspected AMI, defined by high sensitivity cardiac troponin T (hs-cTnT) greater than the upper reference limit (14 ng/L) and without obvious corresponding ischaemia on electrocardiogram (ECG), were classified as either Type 1 MI (T1MI), Type 2 MI (T2MI), acute myocardial injury (AI), or chronic myocardial injury (CI). Patients with non-elevated hs-cTnT (defined as <14 ng/L) were excluded. Outcomes assessed included death, MI, unstable angina, and non-coronary cardiovascular events within 12 months. In total, 1,192 patients comprising 164 (13.8%) T1MI, 173 (14.5%) T2MI/AI, and 855 (71.7%) CI were included. The rate of death or recurrent acute coronary syndrome was greatest in patients with T1MI, but also occurred with moderate frequency in Type 2 MI/AI and CI (T1MI: 32/164 [19.5%]; T2MI/AI: 24/173 [13.1%]; CI:116/885 [13.6%]; p=0.008). Of all the deaths observed, 74% occurred among those with an initial index diagnostic classification of CI. After adjusting for age, gender and baseline comorbidities, the relative hazard ratios for non-coronary cardiovascular readmissions were similar across all groups: Type 2 MI/AI: 1.30 (95% confidence interval 0.99-1.72, p=0.062); CI: 1.10 (95% confidence interval 0.61-2.00, p=0.75). Non-T1MI accounted for the majority of patients presenting with elevated hs-cTnT without ischaemia on ECG. Patients with T1MI had the highest rates of death or recurrent AMI; however patients with T2MI/AI and CI experienced a substantial rate of non-coronary cardiovascular re-hospitalisations.

Theory-based cognitive–narrative intervention versus didactic education for promoting prompt care-seeking for acute myocardial infarction: A multisite mixed-methods randomized controlled trial

BackgroundProlonged delays by patients in making care-seeking decisions remain a significant obstacle to the effective management of acute myocardial infarction. ObjectivesThis study aimed to compare the effects of a theory-based cognitive–narrative intervention with those of didactic education over a 24-month period on the participants' attitudes, beliefs, and knowledge regarding acute myocardial infarction, prehospital delay time, and the use of an ambulance. We also explored participants' engagement in the intervention. DesignThis study adopted a sequential mixed-methods design comprising a multisite randomized controlled trial and a qualitative study. MethodsCommunity-dwelling adult patients with a prior history of acute myocardial infarction in the past year were recruited from four hospitals in Hong Kong. They were randomly assigned to an 8-week theory-based cognitive–narrative intervention that involved a vivid experience of complex decision-making or didactic education. The Acute Coronary Syndrome Response Index questionnaire was administered at baseline (T0) and at 3- (T1), 12- (T2), and 24-month (T3) follow-up time points. Prehospital delay time and the use of an ambulance were evaluated for those participants who had recurrent acute myocardial infarction attacks during the study period. ResultsA total of 608 participants were randomly assigned to the theory-based cognitive–narrative intervention group (n = 304) or the didactic education group (n = 304). The intervention group reported greater improvements than the control group in their attitudes (β = −1.053, p = 0.002) and beliefs (β = −0.686, p = 0.041) regarding acute myocardial infarction and care-seeking at T1. These effects were sustained at T2 [attitudes (β = −0.797, p = 0.018); beliefs (β = −0.692, p = 0.047)] and T3 [attitudes (β = −0.717, p = 0.024); beliefs (β = −0.701, p = 0.032)]. Sixty-three participants experienced another acute myocardial infarction event by T2. The median delay times for the intervention and control groups were 3.13 h (interquartile range (IQR: 1.15–6.48)) and 4.82 h (IQR: 2.23–9.02), respectively. The prehospital delay time was significantly reduced in the intervention group compared with the control group (β = −0.07, p = 0.011). The qualitative findings echoed the quantitative findings, as participants indicated that the intervention helped them to understand the variable nature of the disease presentation, which enabled them to recognize the symptoms more readily. ConclusionThe novel cognitive–narrative intervention used in this study effectively improved the participants' attitudes and beliefs regarding acute myocardial infarction and reduced the prehospital delay time. Trial registrationThis study was registered with the International Clinical Trials Registry Platform of the World Health Organization (ChiCTR-IIC-17010576) on February 2, 2017; the first participant was recruited on January 11, 2018.

Identification and validation of six acute myocardial infarction-associated variants, including a novel prognostic marker for cardiac mortality.

Acute myocardial infarction (AMI) is one of the leading causes of death worldwide, and approximately half of AMI-related deaths occur before the affected individual reaches the hospital. The present study aimed to identify and validate genetic variants associated with AMI and their role as prognostic markers. We conducted a replication study of 29 previously identified novel loci containing 85 genetic variants associated with early-onset AMI using a new independent set of 2,920 Koreans [88 patients with early- and 1,085 patients with late-onset AMI, who underwent percutaneous coronary intervention (PCI), and 1,747 healthy controls]. Of the 85 previously reported early-onset variants, six were confirmed in our genome-wide association study with a false discovery rate of less than 0.05. Notably, rs12639023, a cis-eQTL located in the intergenic region between LINC02005 and CNTN3, significantly increased longitudinal cardiac mortality and recurrent AMI. CNTN3 is known to play a role in altering vascular permeability. Another variant, rs78631167, located upstream of PLAUR and known to function in fibrinolysis, was moderately replicated in this study. By surveying the nearby genomic region around rs78631167, we identified a significant novel locus (rs8109584) located 13 bp downstream of rs78631167. The present study showed that six of the early-onset variants of AMI are applicable to both early- and late-onset cases. Our results confirm markers that can potentially be utilized to predict, screen, prevent, and treat candidate patients with AMI and highlight the potential of rs12639023 as a prognostic marker for cardiac mortality in AMI.

Prognostic factors in young patients with ST-segment elevation myocardial infarction.

The prognostic factors of young patients aged ≤40 years with ST-segment elevation myocardial infarction (STEMI) remain unclear. This study explored risk factors that may affect the 1-year prognosis of young STEMI patients by analyzing patient data of baseline, clinical regimen, and secondary prevention. Baseline and clinical data were collected from 420 STEMI patients aged ≤40 years. One year of follow-up was performed to record and compare the differences in data between patients with and without adverse events. Binary logistic regression analysis with controls for confounding factors was used to evaluate prognosis-related independent factors. The overall incidence of cardiovascular adverse events was 15.95%. Comparison of the subgroups revealed that regardless of adjustment for confounding factors, prognoses of the patients were affected by the following factors: BMI, marital status, serum apolipoprotein(a) (ApoA) levels, number of diseased vessels, treatment regimen, compliance of secondary prevention, improvement of lifestyle, and adjusted comorbidities ( P < 0.05). Independent analysis of adverse events revealed that BMI, number of diseased vessels, and compliance of secondary prevention were independent factors of recurrent acute myocardial infarction in patients. Serum ApoA level, treatment regimen, and compliance of secondary prevention were independent influence factors of heart failure in patients. Marital status and serum ApoA level were independent factors of malignant arrhythmias in patients. BMI, compliance of secondary prevention, and improvement of lifestyle were independent factors of cardiac death in patients. This study determined the influential factors for the prognosis of STEMI patients aged ≤40 years as follows: BMI, marital status, comorbidities, number of diseased vessels, regimen, compliance of secondary prevention, and improvement of lifestyle. The risk of cardiovascular adverse events may be reduced by modulating the influential factors.

Recurrent myocardial infarction and emergency department visits: a retrospective study on the Stockholm Area Chest Pain Cohort

BackgroundPatients who experience acute myocardial infarction (AMI) are at risk of recurrent AMI. Contemporary data on recurrent AMI and its association with return emergency department (ED) visits for chest pain...