Onset Of Acute Myocardial Infarction Research Articles

Cardiovascular outcomes, mortality, and bleeding in patients with acute myocardial infarction and a history of cancer: a report from the multi-center, nationwide prospective database JAMIR

Abstract Background Limited data are available regarding the cardiovascular outcome including bleeding of patients with history of cancer who develop acute myocardial infarction (AMI). Purpose The purpose of this study was to analyze the characteristics and clinical outcomes of patients following AMI according to the history of cancer in in a contemporary cohort. Methods Consecutive patients with spontaneous onset of AMI were enrolled between December 2015 and May 2017 at 50 institutions in the Japan AMI Registry (JAMIR), a multi-center, nationwide prospective registry. Patients were divided into 2 groups according to a history of cancer at admission for index AMI events. The outcomes of interest were all-cause death, major bleeding defined as BARC type 3 or 5, and composite ischemic events defined as cardiovascular death, myocardial infarction and ischemic stroke. These events were analyzed by the log-rank test, and Hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated with a Cox proportional hazards model with adjustment for covariates such as age, sex, body weight, ST-elevation MI, use of anticoagulants, history of cerebrovascular disease, trans-radial approach procedure, Killip class ≥2, estimated glomerular filtration rate, and history of previous MI or percutaneous coronary intervention. Results A total of 3,411 AMI patients were enrolled, and followed for a median of 358 days. Among those, 292 patients (8.6%) had a history of cancer and they were older and had more comorbidities than those without (mean age [standard deviation], 76.0 [9.9] vs 67.4 [13.3]; P<0.001). They had a similar risk of composite ischemic events (adjusted HR [adjHR] 1.18 [95% CI 0.80–1.75], P=0.39), and major bleeding (adjHR 1.13 [95% CI 0.70–1.83], P=0.61) compared with those without, whereas were at higher risk for all-cause mortality (adjHR 1.64 [95% CI 1.16–2.32], P=0.005; Figure 1). While no between-group difference in cardiovascular death was observed, non-cardiovascular death and death due to cancer were higher in the cancer group than in the no-cancer group (adjHR 1.38 [95% CI 0.85–2.24], P=0.19; adjHR 2.05 [95% CI 1.24–3.39], P=0.005; adjHR 18.16 [95% CI 6.74–48.97], P<0.001, respectively). When further stratified by age, there was neither the difference in cardiovascular events nor bleeding events by the presence or absence of a history of cancer, whereas the difference in all-cause mortality became pronounced in the group aged<75 years but not in the group aged>75 years (adjHR 3.32 [1.88–5.85] and 1.26 [0.81–1.96], respectively; Figures 1 and 2). There was a significant interaction between caner and age (P for interaction=0.008). Conclusion The real-world multi-center database JAMIR demonstrated that a history of cancer was associated with increased mortality in AMI patients aged<75 years. These results might suggest the need for a multidisciplinary approach to improve the prognosis of younger AMI patients with a history of cancer.Figure 1Figure 2

Abstract 11810: Is the Presence of Statin Use Before Onset of Disease Associated With In-Hospital Mortality in Elderly Patients With Acute Myocardial Infarction?

Introduction: The effect of statin on preventing cardiovascular events is clear, and aggressive lipid-lowering therapy with statins is strongly recommended for patients with coronary artery disease including of acute myocardial infarction (AMI). Hypothesis: The relationship between in-hospital mortality of AMI and statin use before onset of AMI in the elderly patients is unknown, we thus assessed. Methods: The subjects were 207 consecutive AMI patients aged 65 years or older who underwent successful percutaneous coronary intervention (PCI) at Kagoshima university hospital between January 2015 and March 2021. We investigated the association between in-hospital mortality after PCI and baseline characteristics including Global Registry of Acute Coronary Events (GRACE) risk score, which is widely used for estimating mortality in AMI patients. Results: Twenty-three patients (11%) died in-hospital. The mortality rate was significantly lower in patients who were taking statins at presentation compared to those who were not (3% vs. 16%, p=0.002). Univariate logistic regression analysis of risk factors for in-hospital mortality revealed that statin use before onset of AMI, level of serum albumin, level of high sensitivity C-reactive protein (hs-CRP) and GRACE risk score were associated with in-hospital mortality. Multivariate logistic analysis models adjusted for age, statin use, level of serum albumin, level of hs-CRP, and GRACE risk score showed that statin use [Odd's ratio (OR): 0.13, 95% confidence interval (CI): 0.02-0.81, p=0.029] and GRACE risk score (OR: 1.04, 95% CI: 1.02-1.06, p <0.001) were independently associated with in-hospital mortality. The optimal cut-off on the receiver-operating characteristic curve of GRACE risk score for predicting in-hospital mortality was 160. In addition, multivariate logistic analysis models using GRACE risk score ≥160 and non-use of statin before the onset of AMI showed greater risk of in-hospital mortality (HR 19.24; 95% CI 6.62-55.94; p <0.001) after PCI as compared to patients with GRACE risk score <160 and statins use. Conclusions: In elderly AMI patients undergoing PCI, statin use before the onset of AMI was an independent risk factor for in-hospital mortality, as was the GRACE risk score.

Abstract 12591: 12,13-dihome and Noradrenaline Are Associated With the Occurrence of Acute Myocardial Infarction in Patients With Type 2 Diabetes Mellitus

Introduction: Acute myocardial infarction (AMI) is the most prevalent cause of mortality and morbidity in patients with type 2 diabetes mellitus (T2DM). However, strict blood glucose control does not always prevent the development and progression of AMI. Aims: Therefore, the present study aimed to explore potential new biomarkers associated with the occurrence of AMI in T2DM patients. Methods: A total of 82 participants were recruited, including the control group (n=28), T2DM without AMI group (T2DM, n=30) and T2DM with initial AMI group (T2DM+AMI, n=24). The untargeted metabolomics using LC-MS analysis was performed to evaluate the changes in serum metabolites. Then, candidate metabolites were determined using ELISA method in the validation study (n=126/T2DM group, n=122/T2DM+AMI group). Results: The results showed that 146 differential serum metabolites were identified among the control, T2DM and T2DM+AMI, Moreover, 16 differentially-expressed metabolites were significantly altered in T2DM+AMI compared to T2DM. Furthermore, three candidate differential metabolites, 12,13-diHOME, noradrenaline (NE) and estrone sulfate (ES), were selected for validation study. Serum levels of 12,13-diHOME and NE in T2DM+AMI were significantly higher than those in T2DM. Multivariate logistic analyses showed that 12,13-diHOME (OR, 1.491; 95% CI, 1.230-1.807, P <0.001) and NE (OR, 8.636; 95% CI, 2.303-32.392, P =0.001) were independent risk factors for AMI occurrence in T2T2DM patients. The area under receiver operating characteristic (ROC) curve (AUC) were 0.757 (95% CI:0.697-0.817, P <0.001) and 0.711(95% CI:0.648-0.775, P <0.001), respectively. The combination of both significantly improved the AUC to 0.816 (95% CI:0.763-0.869, P <0.001). Conclusions: 12,13-diHOME and NE may lead to understanding the possible metabolic alterations associated with AMI onset in T2DM population and serve as promising risk factors and therapeutic targets.

Abstract 12839: Anti-Thrombotic Therapy, Bleeding, and Mortality in Patients With Acute Myocardial Infarction and a History of Cancer: A Report From JAMIR, the Multi-Center, Nationwide Prospective Registry

Background: The relationship between a history of cancer and clinical outcomes including bleeding in acute myocardial infarction (AMI) patients remains unclear in a contemporary cohort. Aims: This study aimed to analyze clinical outcomes of patients following AMI according to the history of cancer. Methods: Consecutive patients with spontaneous onset of AMI were enrolled between December 2015 and May 2017 at 50 institutions in the Japan AMI Registry (JAMIR), a multi-center, nationwide prospective registry. The outcomes of interest were all-cause death, major bleeding defined as BARC type 3 or 5, and composite ischemic events defined as cardiovascular (CV) death, MI, and ischemic stroke. Results: A total of 3,411 AMI patients were enrolled, and followed for a median of 358 days. Among those, 292 patients (8.6%) had a history of cancer. They were older, had more comorbidities, and were more likely to use clopidogrel but not prasugrel than those without. They had a similar risk of composite ischemic events, and major bleeding compared with those without, whereas were at higher risk for all-cause mortality (adjHR 1.64 [95% CI 1.16-2.32], P=0.005; Figure 1 ). While no between-group difference in CV death was observed, non-CV death and death due to cancer were higher in the cancer group than in the no-cancer group (adjHR 2.05 [95% CI 1.24-3.39], P=0.005; adjHR 18.16 [95% CI 6.74-48.97], P<0.001, respectively; Figure 2 ). When further stratified by age, the difference in all-cause mortality became pronounced in the group aged<75 years but not in the group aged>75 years (adjHR 3.32 [1.88-5.85] and 1.26 [0.81-1.96], respectively; P for interaction=0.008; Figures 1 and 3 ). Conclusion: The nationwide multi-center registry, JAMIR demonstrated that a history of cancer was associated with increased mortality in AMI patients aged<75 years. These results might suggest the need for a multidisciplinary approach to improving the prognosis of younger AMI patients with a history of cancer.

Automatic measurement of short-term variability of repolarization to indicate ventricular arrhythmias in a porcine model of cardiac ischaemia.

An automated method for determination of short-term variability (STV) of repolarization on intracardiac electrograms (STV-ARIauto) has previously been developed for arrhythmic risk monitoring by cardiac implantable devices, and has proved effective in predicting ventricular arrhythmias (VA) and guiding preventive high-rate pacing (HRP) in a canine model. Current study aimed to assess (i) STV-ARIauto in relation to VA occurrence and secondarily (ii-a) to confirm the predictive capacity of STV from the QT interval and (ii-b) explore the effect of HRP on arrhythmic outcomes in a porcine model of acute myocardial infarction (MI). Myocardial infarction was induced in 15 pigs. In 7/15 pigs, STV-QT was assessed at baseline, occlusion, 1 min before VA, and just before VA. Eight of the 15 pigs were additionally monitored with an electrogram catheter in the right ventricle, underwent echocardiography at baseline and reperfusion, and were randomized to paced or control group. Paced group received atrial pacing at 20 beats per min faster than sinus rhythm 1 min after occlusion. Short-term variability increased prior to VA in both STV modalities. The percentage change in STV from baseline to successive timepoints correlated well between STV-QT and STV-ARIauto. High-rate pacing did not improve arrhythmic outcomes and was accompanied by a stronger decrease in ejection fraction. STV-ARIauto values increase before VA onset, alike STV-QT in a porcine model of MI, indicating imminent arrhythmias. This highlights the potential of automatic monitoring of arrhythmic risk by cardiac devices through STV-ARIauto and subsequently initiates preventive strategies. Continuous HRP during onset of acute MI did not improve arrhythmic outcomes.

One-Stop Plasmonic Nanocube-Excited SERS Immunoassay Platform of Multiple Cardiac Biomarkers for Rapid Screening and Progressive Tracing of Acute Myocardial Infarction.

Rapid and precise acute myocardial infarction (AMI) diagnosis is essential for preventing patient death. In addition, the complementary roles of creatine kinase muscle brain (CK-MB) and cardiac troponin I (cTnI) cardiac biomarkers in the early and late stages of AMI demand their simultaneous detection, which is difficult to implement using conventional fluorescence and electrochemical technologies. Here, a nanotechnology-based one-stop immuno-surface-enhanced Raman scattering (SERS) detection platform is reported for multiple cardiac indicators for the rapid screening and progressive tracing of AMI events. Optimal SERS is achieved using optical property-based, excitation wavelength-optimized, and high-yield anisotropic plasmonic gold nanocubes. Optimal immunoassay reaction efficiencies are achieved by increasing immobilized antibodies. Multiple simultaneous detection strategies are implemented by incorporating two different Raman reports with narrow wavenumbers corresponding to two indicators and by establishing a computational SERS mapping process to accurately detect their concentrations, irrespective of multiple enzymes in the human serum. The SERS platform precisely estimated AMI onset and progressive timing in human serum and made rapid AMI identification feasible using a portable Raman spectrometer. This integrated platform is hypothesized to significantly contribute to emergency medicine and forensic science by providing timely treatment and observation.

"We are in the forgotten corner!" a qualitative study of experiences and challenges among Chinese older women at the onset of acute myocardial infarction.

Acute myocardial infarction (AMI) is a common and serious cardiovascular disease (CVD) that is one of the leading causes of death among women globally and in China. However, there are sex-associated differences and inequalities in the detection and management of AMI, especially in older people. There is little research demonstrating how challenges and barriers affect older women's help-seeking behavior and health-related procedures in China. The objective of this study was to explore the experiences of older women with AMI, focusing on their perception, challenges, and coping strategies at the onset of AMI in Wuhan, China. This study utilized a qualitative research design approach and conducted semi-structured, in-depth, and audio-recorded interviews with 18 women aged 65-84 years, purposively selected from two tertiary hospitals in Wuhan City from November 2021 to April 2022. Interpretative Phenomenological Analysis (IPA) was used in this study to analyze the data on 18 participants and three major themes were generated: disease perception disorder, negative coping strategies, and barriers due to social-environmental contexts. To reduce older women's delay in seeking help, healthcare professionals should provide public health education that emphasizes sex-related disparities, and age-specific knowledge-attitude aspects to high-risk groups. Policy-based and health administration recommendations, including e-health information support, access to care, and social-environmental factors, should be highlighted to promote women's health behavior.

Mind the Gap: Model-Based Switching from Selatogrel to Maintenance Therapy with Oral P2Y12 Receptor Antagonists.

Background: The P2Y12 receptor antagonist selatogrel is being developed for subcutaneous self-administration with a ready-to-use autoinjector at the onset of acute myocardial infarction (AMI) symptoms. The unique pharmacological profile of selatogrel (fast, potent, and short-acting) can bridge the time gap between the onset of AMI and first medical care. A clinical Phase 1 study showed a time-dependent pharmacodynamic interaction between selatogrel and loading doses of clopidogrel and prasugrel. As treatment switching is a common clinical practice, the assessment of subsequent switching from a clopidogrel loading dose to the first maintenance dose of oral P2Y12 receptor antagonists is highly relevant. Objectives: Model-based predictions of inhibition of platelet aggregation (IPA) for the drugs triggering pharmacodynamic interactions were to be derived to support clinical guidance on the transition from selatogrel to oral P2Y12 receptor antagonists. Methods: Scenarios with selatogrel 16 mg administration or placebo followed by a clopidogrel loading dose and, in turn, prasugrel or ticagrelor maintenance doses at different times of administration were studied. Population pharmacokinetic/pharmacodynamic modeling and simulations of different treatment scenarios were used to derive quantitative estimates for IPA over time. Results: Following selatogrel/placebo and a clopidogrel loading dose, maintenance treatment with ticagrelor or a prasugrel loading dose followed by maintenance treatment quickly achieved sustained IPA levels above 80%. Prior to maintenance treatment, a short time span from 18 to 24 h was identified where IPA levels were predicted to be lower with selatogrel than with placebo if clopidogrel was administered 12 h after selatogrel or placebo. Predicted IPA levels reached with placebo alone and a clopidogrel loading dose at 4 h were consistently lower than with selatogrel administration, followed by a clopidogrel loading dose at 12 h. If a clopidogrel loading dose is administered at 12 h, selatogrel maintains higher IPA levels up to 16 h. IPA levels are subsequently lower than on the placebo until the administration of the first maintenance dose. Conclusions: Model-based predictions informed the transition from selatogrel subcutaneous administration to oral P2Y12 therapy. The application of modeling techniques illustrates the value of employing pharmacokinetic and pharmacodynamic modeling for the simulation of various clinical scenarios of switching therapies.

Protectin D1 Alleviates Myocardial Ischemia/Reperfusion Injury by Regulating PI3K/AKT Signaling Pathway.

Myocardial ischemia/reperfusion (I/R) injury after the onset of acute myocardial infarction (AMI) can be life-threatening, and there is no effective strategy for therapeutic intervention. Here, we studied the potential of protectin D1 in protecting from I/R-induced cardiac damages and investigated the underlying mechanisms. An in vivo rat model of I/R after AMI induction was established through the ligation of the left anterior descending (LAD) artery to assess the cardiac functions and evaluate the protective effect of protectin D1. Protectin D1 protected against I/R-induced oxidative stress and inflammation in the rat model, improved the cardiac function, and reduced the infarct size in myocardial tissues. The beneficial effect of protectin D1 was associated with the up-regulation of miRNA-210 and the effects on PI3K/AKT signaling and HIF-1α expression. Together, our data suggest that protectin D1 could serve as a potential cardioprotective agent against I/R-associated cardiac defects.

Cold Spells and the Onset of Acute Myocardial Infarction: A Nationwide Case-Crossover Study in 323 Chinese Cities.

Few studies have explored the relationships between cold spells and acute myocardial infarction (AMI) using the information of symptom onset. We assessed the impact of cold spells on AMI onset and the potential effect modifiers. We conducted a time-stratified case-crossover study among 456,051 eligible patients with AMI from 2,054 hospitals in 323 Chinese cities between January 2015 and June 2021 during cold seasons (November to March). Nine definitions of cold spells were used by combining three relative temperature thresholds (i.e., lower than the 7.5th, 5th, and 2.5th percentiles) and three durations of at least 2-4 consecutive d. Conditional logistic regressions with distributed lag models were applied to evaluate the cumulated effects of cold spells on AMI onset over lags 0-6 d, after adjusting for daily mean temperature. The associations generally appeared on lag 1 d, peaked on lag 3 d, and became nonsignificant approximately on lag 5 d. Cold spells defined by more stringent thresholds of temperature were associated with higher risks of AMI onset. For cold spell days defined by a daily mean temperature of percentile and durations of , , and , the percentage changes in AMI risk were 4.24% [95% confidence interval (CI): 2.31%, 6.20%], 3.48% (95% CI: 1.62%, 5.38%), and 2.82% (95% CI: 0.98%, 4.70%), respectively. Significant AMI risks associated with cold spells were observed among cases from regions without centralized heating, whereas null or much weaker risks were found among those from regions with centralized heating. Patients years of age were more susceptible to cold spells. This national case-crossover study presents compelling evidence that cold spells could significantly increase the risk of AMI onset. https://doi.org/10.1289/EHP11841.

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.

Association of body mass index, metabolic health status and clinical outcomes in acute myocardial infarction patients: a national registry-based study.

Obesity is an important risk factor for acute myocardial infarction (AMI), but the interplay between metabolic health and obesity on AMI mortality has been controversial. In this study, we aimed to elucidate the risk of short- and long-term all-cause mortality by obesity and metabolic health in AMI patients using data from a multi-ethnic national AMI registry. A total of 73,382 AMI patients from the national Singapore Myocardial Infarction Registry (SMIR) were included. These patients were classified into four groups based on the presence or absence of metabolic diseases, diabetes mellitus, hyperlipidaemia, and hypertension, and obesity: (1) metabolically-healthy-normal-weight (MHN); (2) metabolically-healthy-obese (MHO); (3) metabolically-unhealthy-normal-weight (MUN); and (4) metabolically-unhealthy-obese (MUO). MHO patients had reduced unadjusted risk of all-cause in-hospital, 30-day, 1-year, 2-year, and 5-year mortality following the initial MI event. However, after adjusting for potential confounders, the protective effect from MHO on post-AMI mortality was lost. Furthermore, there was no reduced risk of recurrent MI or stroke within 1-year from onset of AMI by the MHO status. However, the risk of 1-year mortality was higher in female and Malay AMI patients with MHO compared to MHN even after adjusting for confounders. In AMI patients with or without metabolic diseases, the presence of obesity did not affect mortality. The exception to this finding were female and Malay MHO who had worse long-term AMI mortality outcomes when compared to MHN suggesting that the presence of obesity in female and Malay patients may confer worsened outcomes.

Predictive value of atherogenic index of plasma and atherogenic index of plasma combined with low-density lipoprotein cholesterol for the risk of acute myocardial infarction.

Acute myocardial infarction (AMI) is a prevalent medical condition associated with significant morbidity and mortality rates. The principal underlying factor leading to myocardial infarction is atherosclerosis, with dyslipidemia being a key risk factor. Nonetheless, relying solely on a single lipid level is insufficient for accurately predicting the onset and progression of AMI. The present investigation aims to assess established clinical indicators in China, to identify practical, precise, and effective tools for predicting AMI. The study enrolled 267 patients diagnosed with acute myocardial infarction as the experimental group, while the control group consisted of 73 hospitalized patients with normal coronary angiography. The investigators collected general clinical data and relevant laboratory test results and computed the Atherogenic Index of Plasma (AIP) for each participant. Using acute myocardial infarction status as the dependent variable and controlling for confounding factors such as smoking history, fasting plasma glucose (FPG), low-density lipoprotein cholesterol (LDL-C), blood pressure at admission, and diabetes history, the researchers conducted multivariate logistic regression analysis with AIP as an independent variable. Receiver operating characteristic (ROC) curves were employed to determine the predictive value of AIP and AIP combined with LDL-C for acute myocardial infarction. The results of the multivariate logistic regression analysis indicated that the AIP was an independent predictor of acute myocardial infarction. The optimal cut-off value for AIP to predict AMI was -0.06142, with a sensitivity of 81.3%, a specificity of 65.8%, and an area under the curve (AUC) of 0.801 (95% confidence interval [CI]: 0.743-0.859, P < 0.001). When AIP was combined with LDL-C, the best cut-off value for predicting acute myocardial infarction was 0.756107, with a sensitivity of 79%, a specificity of 74%, and an AUC of 0.819 (95% CI: 0.759-0.879, P < 0.001). The AIP is considered an autonomous determinant of risk for AMI. Utilizing the AIP index alone, as well as in conjunction with LDL-C, can serve as effective predictors of AMI.

In-hospital predictors for primary prevention of sudden death after acute myocardial infarction with cardiac dysfunction

BackgroundCurrent guidelines recommend prophylactic defibrillator implantation in patients with acute myocardial infarction (AMI) and left ventricular ejection fraction (LVEF) ≤40 % or LVEF ≤35 % plus heart failure symptoms or inducible ventricular tachyarrhythmias during an electrophysiology study at 40 days after AMI or 90 days after revascularization. In-hospital predictors of sudden cardiac death (SCD) after AMI during the index hospitalization remain unsettled. We sought to examine in-hospital predictors of SCD in patients with AMI and LVEF ≤40 % evaluated during the index hospitalization. MethodsWe retrospectively evaluated 441 consecutive patients with AMI and LVEF ≤40 % admitted to our hospital between 2001 and 2014 (77 % male gender; median age: 70 years; median hospitalization length: 23 days). The primary endpoint was a composite of SCD or aborted SCD at ≥30 days after AMI onset (composite arrhythmic event). LVEF and QRS duration (QRSd) on electrocardiography were measured at a median of 12 days and 18 days, respectively. ResultsDuring a median follow-up of 7.6 years, the incidence of composite arrhythmic events was 7.3 % (32 of 441 patients). In multivariable analysis, QRSd ≥100 msec (beta-coefficient = 1.54, p = 0.003), LVEF ≤23 % (beta-coefficient = 1.14, p = 0.007), and onset-reperfusion time > 5.5 h (beta-coefficient = 1.16, p = 0.035) were independent predictors of composite arrhythmic events. The combination of these 3 factors was associated with the highest rate of composite arrhythmic events compared with 0–2 factors (p < 0.001). ConclusionsThe combination of QRSd ≥100 msec, LVEF ≤23 %, and onset-reperfusion time > 5.5 h during the index hospitalization provides precise risk stratification for SCD in patients early after AMI.

“Recognition of heart attack symptoms and treatment-seeking behaviors: a multi-center survey in Tehran, Iran”

BackgroundIn acute myocardial infarction (AMI), timely recognition of symptoms and early hospital presentation positively affect patient morbidity and mortality. Due to the high burden of ischemic heart disease in Iran, this study aimed to identify factors affecting the level of knowledge, responses at the time of AMI onset, and sources of health information among the Iranian population.MethodThis cross-sectional study was conducted in three tertiary hospitals in Tehran, Iran. An expert-validated questionnaire was used to obtain data. A total of 400 individuals were enrolled.ResultAmong the respondents, 285 people(71.3%) considered “chest pain or discomfort,” and 251 (62.7%) regarded “pain or discomfort in the arm or shoulder” as MI symptoms. Approximately 288 (72.0%) respondents had poor knowledge of the AMI symptoms. Knowledge of symptoms was higher among those with higher levels of education, those with medical-associated jobs, and those who resided in the capital areas. Major risk factors identified by the participants were: anxiety (340)(85.0%), obesity (327)(81.8%), an unhealthy diet (325)(81.3%), and the presence of high LDL levels (258)(64.5%) and Diabetes Mellitus (164)(41.0%) were less appreciated. Calling an ambulance (286)(71.5%) was the most common treatment-seeking behavior in the case of a suspected heart attack.ConclusionIt is vital to educate the general population about AMI symptoms, particularly those with comorbidities at the greatest risk for an AMI episode.

Less risk factor at AMI onset, higher risk in prognosis---the paradoxical phenomenon from MIMIC-III database

Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – National budget only. Main funding source(s): National Natural Science Foundation of China (NSFC). Introduction Numerous epidemiologic studies have confirmed that Standard Modifiable Cardiovascular Risk Factors (SMuRFs) are independent risk factors for coronary heart disease (CHD) and are recommended by guidelines for the primary and secondary prevention of CHD. However, it is interesting to find that the increasing proportion of individuals without SMuRFs in CHD and acute myocardial infarction (AMI). Moreover, accumulating clinical trials have reported the inverse association between the number of risk factors and crude mortality in AMI. It is unknown whether this paradoxical phenomenon can be seen in critical ill patients. Purpose To analyze and validate whether the number of risk factors contradicts the mortality outcome in patients with AMI in the MIMIC-III (Medical Information Mart for Intensive Care III) database. Methods A total of 2484 AMI patients (62.8% male, mean age 71.2 [59.3;80.8] years) admitting to cardiac care unit for the first time from the MIMIC-III database were enrolled. Risk factors were defined as hypertension, diabetes,dyslipidemia, and smoking history. They were grouped according to the number of risk factors. Main outcome was mortality at 2-year following hospitalization. Kaplan-Meier curve and Cox proportional hazards models adjusting for baseline clinical characteristics and in-hospital treatment were constructed to evaluate the impact of numbers of risk factors on mortality in critical AMI patients. Results At 2-year follow-up, death was observed in 714 patients (28.7%). A total of 474(19.1%),1541(62%),469(18.9%) patients had 0,1-2,3-4 SMuRFs respectively. No risk group has a significantly higher 2-year mortality (Picture 1). Compared with no risk group, patients with 1-2 and 3-4 SMuRFs were correlated to an HR of 0.72(95%CI, 0.61-0.86) and 0.66(95%CI, 0.52-0.83) for all-cause mortality in the unadjusted model. Interestingly, after multivariate adjustment, less risk factor at AMI onset was still associated with poor prognosis. Conclusions Taking into confounders, critical AMI patients with less risk factors have higher risk in poor prognosis. Further studies on this paradoxical phenomenon are needed.

Association of PM2.5 from agriculture sources and acute myocardial infarction onset: results from 2015 to 2018 in China

Background and purpose: Acute myocardial infarction (AMI) is a manifestation of coronary artery disease. Fine particulate matter (PM2.5) has been regarded as a risk factor for AMI-related mortality and hospitalizations. Agricultural activities contribute greatly to PM2.5 formation, indicating potential health risks of PM2.5 in agricultural areas. Health effect studies on agricultural source remain scarce, and currently available evidence is controversial. This study investigated the health effects of short-term exposure to PM2.5 from agricultural sources on AMI onset using a nationwide analysis in China. Methods: We reviewed case records from the China Cardiovascular Association Database and extracted the data of 355,815 patients with AMI onset from 1,653 hospitals for the period 2015 to 2018. We obtained daily concentrations of PM2.5 from agricultural sources using the source-oriented Community Multiscale Air Quality model. Moreover, we proposed a time-stratified case-crossover study to examine associations between exposure to PM2.5 from agricultural sources and AMI onset and determined lag effects with a maximum of 3 days. Additionally, we conducted multiple subgroup and sensitivity analyses. Results: Exposure to PM2.5 caused a significantly increased risk of the onset of AMI and its subtypes. Short-term exposure to PM2.5 from agricultural sources on the current day (lag 0) was positively associated with a 4.4% (95% confidence interval [95% CI]: 3.3%–5.5%), 4.9% (95% CI: 3.5%–6.3%), and 3.4% (95% CI: 1.5%–5.4%) increase in the odds of AMI, ST-elevation myocardial infarction (STEMI), and non-STEMI (NSTEMI), for each 10 μg/m3 increase. Meanwhile, higher risk estimations were pronounced in individuals who were aged above 65 years, who lived in southern China, and who resided in the rural area setting, and significant differences were mostly found in NSTEMI onsets. Conclusions: Short-term exposure to PM2.5 from agricultural sources may trigger the onset of AMI and its two subtypes. Improving agriculture management through ammonia emission abatement can help in achieving PM2.5 reduction and protecting public health.

Air pollution and cardiovascular heath in a changing climate

Air pollution and cardiovascular heath in a changing climate

TCTAP C-003 The Slow, the Silent and the Deadly: Delayed Onset Acute Myocardial Infarction Due to Left Main Occlusion Following Motor Vehicle Accident Without Obvious Chest Trauma

TCTAP C-003 The Slow, the Silent and the Deadly: Delayed Onset Acute Myocardial Infarction Due to Left Main Occlusion Following Motor Vehicle Accident Without Obvious Chest Trauma

The Difference of Chest Pain in Adult and Elderly Patients with Acute Myocardial Infarction

Chest pain in an acute attack of myocardial infarction cannot be underestimated because this pain will have a harmful impact on the patient. Pain is influenced by personality, life stress, social economic factor, cognitive, and psychology factor. There is no study comparing chest pain between adult and elderly patients with coronary artery disease. Thus, this study to compare chest pain in patients with acute myocardial infarction in adults and the elderly. This research is a quantitative analytic study with a documentation study. With the purposive sampling technique, the number of samples in this study was 68 respondents. The statistical analysis employed the Mann Withney test. Out of total participant ( n=68), 72,1 % were elderly, 60,3 % were male and 79,4 % were STEMI. The results were obtained from the pain scale in adults with a mean value of 54.11 and a mean value at the elderly age 26.90 with a value of p (0.000). There is a significant difference between myocardial infarction pain in adults and acute myocardial infarction pain in the elderly. Adult more high intensity of pain than elderly patients. This study recommended that health workers so provide serious treatment for chest pain patients in elderly althaought the pain is not serious.