Sex differences in symptom presentation in acute myocardial infarction: A systematic review and meta-analysis

Identify and mitigate bias in electronic phenotyping: A comprehensive study from computational perspective

Electronic phenotyping is a fundamental task that identifies the special group of patients, which plays an important role in precision medicine in the era of digital health. Phenotyping provides real-world evidence for other related biomedical research and clinical tasks, e.g., disease diagnosis, drug development, and clinical trials, etc. With the development of electronic health records, the performance of electronic phenotyping has been significantly boosted by advanced machine learning techniques. In the healthcare domain, precision and fairness are both essential aspects that should be taken into consideration. However, most related efforts are put into designing phenotyping models with higher accuracy. Few attention is put on the fairness perspective of phenotyping. The neglection of bias in phenotyping leads to subgroups of patients being underrepresented which will further affect the following healthcare activities such as patient recruitment in clinical trials. In this work, we are motivated to bridge this gap through a comprehensive experimental study to identify the bias existing in electronic phenotyping models and evaluate the widely-used debiasing methods' performance on these models. We choose pneumonia and sepsis as our phenotyping target diseases. We benchmark 9 kinds of electronic phenotyping methods spanning from rule-based to data-driven methods. Meanwhile, we evaluate the performance of the 5 bias mitigation strategies covering pre-processing, in-processing, and post-processing. Through the extensive experiments, we summarize several insightful findings from the bias identified in the phenotyping and key points of the bias mitigation strategies in phenotyping.

The role of sex and gender in somatic complaints among patients with coronary heart disease: A longitudinal study on acute and long-term changes

BACKGROUND

Somatic complaints are persistently reported in patients with coronary heart disease (CHD). Sex and gender influence health and well-being in a variety of ways, but it is unknown how they affect somatic complaints over time after percutaneous coronary intervention (PCI). Therefore, we examined the association between sex and gender on somatic health complaints during the first month (acute) and the first two years (recovery) after PCI.

METHODS

514 patients (Mage = 64.2 ± 8.9, 84.2% male) completed the somatic scale of the Health Complaints Scale (including the subscales: cardiopulmonary complaints, fatigue, sleep problems) at baseline, one, 12-, and 24-months post-PCI. In a follow-up study, they filled in additional questionnaires to gauge gender norms, traits, and identity. Linear mixed modeling analyses were used to assess the influence of sex, gender, their interaction, and covariates on somatic complaints for the acute and recovery phases separately.

RESULTS

A general decline in somatic complaints over time was observed during the acute phase, followed by a stabilization in the recovery phase. Females and individuals with more feminine traits, norms, and identities reported increased somatic complaints. Males with more pronounced feminine norms and females with more masculine norms likewise reported more somatic, cardiopulmonary, and fatigue complaints. Furthermore, age, cardiac history, and comorbid diseases partly explained the associations with somatic complaints.

CONCLUSION

While somatic complaints improve post-PCI, there are still conspicuous sex and gender differences that need to be considered. Future research should further elaborate upon these discrepancies and incorporate sex and gender in prevention and develop tailored interventions to diminish somatic complaints.

Emergency Nurses' Recognition of and Perception of Sex Differences in Acute Coronary Syndrome Symptoms

INTRODUCTION

Emergency nurses must quickly identify patients with potential acute coronary syndrome. However, no recent nationwide research has explored nurses' knowledge of acute coronary syndrome symptoms. The purpose of this study was to explore emergency nurses' recognition of acute coronary syndrome symptoms, including whether nurses attribute different symptoms to women and men.

METHODS

We used a cross-sectional, descriptive design using an online survey. Emergency nurses from across the United States were recruited using postcards and a posting on the Emergency Nurses Association website. Demographic data and participants' recognition of acute coronary syndrome symptoms, using the Acute Coronary Syndrome Symptom Checklist, were collected. Descriptive statistics and ordinal regression were used to analyze the data.

RESULTS

The final sample included 448 emergency nurses with a median 7.0 years of emergency nursing experience. Participants were overwhelmingly able to recognize common acute coronary syndrome symptoms, although some symptoms were more often associated with women or with men. Most participants believed that women and men's symptoms were either "slightly different" (41.1%) or "fairly different" (42.6%). Nurses who completed training for the triage role were significantly less likely to believe that men and women have substantially different symptoms (odds ratio 0.47; 95% CI 0.25-0.87).

DISCUSSION

Emergency nurses were able to recognize common acute coronary syndrome symptoms, but some reported believing that the symptom experience of men and women is more divergent than what is reported in the literature.

Large-scale characterization of gender differences in diagnosis prevalence and time to diagnosis

We carry out an analysis of gender differences in patterns of disease diagnosis across four large observational health datasets and find that women are routinely older when first assigned most diagnoses. Among 112 acute and chronic diseases, women experience longer lengths of time between symptom onset and disease diagnosis than men for most diseases regardless of metric used, even when only symptoms common to both genders are considered. These findings are consistent for patients with private as well as government insurance. Our analysis highlights systematic gender differences in patterns of disease diagnosis and suggests that symptoms of disease are measured or weighed differently for women and men. Data and code leverage the open-source common data model and analytic code and results are publicly available.

The Influence of Sex, Age, and Race on Coronary Artery Disease: A Narrative Review

Cardiovascular disease has remained one of the leading causes of mortality in the world. The basic pathophysiology of coronary artery disease (CAD) is a reduction of the blood flow in coronary vessels, leading to restricted blood flow to the heart muscle. Both modifiable and non-modifiable risk factors contribute to its multifactorial etiology. The clinical presentation ranges from asymptomatic to typical symptoms like chest pain, shortness of breath, and left arm or jaw pain. The purpose of this review is to investigate and analyze the variation of CAD depending on the biological sex, age, race, or ethnicity and how it might differ in the studied population while comparing the symptoms and prognosis of CAD. For this research, PubMed's database was used. A total of 926 articles were selected using pre-determined inclusion and exclusion criteria, with 74 articles eligible to be included in the narrative review. Studies were selected from the general population of patients with CAD, regardless of their severity, stage of diagnosis, and treatment plan. The scale for the assessment of non-systematic review articles (SANRA) was used to assess the quality of the study. As humans age, the incidence of CAD increases, and people over 75 are more likely to have multiple-vessel CAD. It has been observed that South Asians have the highest rate of CAD at 24%, while the White population has the lowest at 8%. The prevalence of CAD also depends on race, with the White population having the lowest rate at 3.2%, followed by Hispanics at 5%, Black women at 5.2%, and Black men at 5.7%. Younger Black women tend to have more chest pain. Men with CAD commonly experience chest pain, and women are more likely to present with atypical symptoms. Modifiable risk factors such as smoking and alcoholism are more commonly observed in young men than in young women. Coronary artery disease in the elderly, female, minority, and Black patients is associated with a higher mortality rate. Acknowledging the prevalence of certain risk factors, signs, results, and responses to treatment in certain socio-demographic groups, as well as the provision and accessibility of diagnosis and treatment, would lead to a better outcome for all individuals. The impact of this shift can range from an earlier diagnosis of CAD to a faster and more customized treatment plan tailored to each patient's individual requirements.

A capillary-based microfluidic chip with the merits of low cost and easy fabrication for the rapid detection of acute myocardial infarction

Point-of-care testing methods currently utilize rapid, portable, inexpensive, and multiplexed on-site detection. Microfluidic chips have become a very promising platform with broad development prospects due to their breakthrough improvement in miniaturization and integration. However, the conventional microfluidic chips still have disadvantages, such as difficulty in fabrication processing, long production time and high cost, which hinder its applications in the fields of POCT and in vitro diagnostics. In this study, a capillary-based microfluidic chip with the characteristics of low cost and easy fabrication was developed for the rapid detection of acute myocardial infarction (AMI). Several short capillaries, which were already conjugated with the capture antibodies respectively, were connected by peristaltic pump tubes and then formed the working capillary. Two working capillaries were encapsulated in the plastic shell and ready for the immunoassay. Multiplex detection of Myoglobin (Myo), cardiac troponin I (cTnI) and creatine kinase-MB (CK-MB) were chosen to demonstrate the feasibility and analytical performance of the microfluidic chip, which requires rapid and accurate detection during diagnosis and therapy for AMI. The capillary-based microfluidic chip required tens of minutes to prepared, and its cost was less than $1. The limit of detection (LOD) was 0.5 ng/mL for Myo, 0.1 ng/mL for cTnI and 0.5 ng/mL for CK-MB respectively. The capillary-based microfluidic chips with easy fabrication and low cost hold promise for the portable and low-cost detection of target biomarkers.

Age and Sex Differences and Temporal Trends in the Use of Invasive and Noninvasive Procedures in Patients Hospitalized With Acute Myocardial Infarction

Background

Few studies have examined age and sex differences in the receipt of cardiac diagnostic and interventional procedures in patients hospitalized with acute myocardial infarction and trends in these possible differences during recent years.

Methods and Results

Data from patients hospitalized with a first acute myocardial infarction at the major medical centers in the Worcester, Massachusetts, metropolitan area were utilized for this study. Logistic regression analysis was used to examine age (<55, 55–64, 65–74, and ≥75 years) and sex differences in the receipt of echocardiography, exercise stress testing, coronary angiography, percutaneous coronary interventions, and coronary artery bypass graft surgery, and trends in the use of those procedures during patients' acute hospitalization, between 2005 and 2018, while adjusting for important confounding factors. The study population consisted of 1681 men and 1154 women with an initial acute myocardial infarction who were hospitalized on an approximate biennial basis between 2005 and 2018. A smaller proportion of women underwent cardiac catheterization, percutaneous coronary intervention, and coronary artery bypass graft surgery, while there were no sex differences in the receipt of echocardiography and exercise stress testing. Patients aged ≥75 years were less likely to undergo cardiac catheterization, percutaneous coronary intervention, and coronary artery bypass graft surgery, but were more likely to receive echocardiography compared with younger patients. Between 2005 and 2018, the use of echocardiography and coronary artery bypass graft surgery nonsignificantly increased among all age groups and both sexes, while the use of cardiac catheterization and percutaneous coronary intervention increased nonsignificantly faster in women and older patients.

Conclusions

We observed a continued lower receipt of invasive cardiac procedures in women and patients aged ≥75 years with acute myocardial infarction, but age and sex gaps associated with these procedures have narrowed during recent years.

Clinical presentation in EMS patients with acute chest pain in relation to sex, age and medical history: prospective cohort study

OBJECTIVE

To assess symptom presentation related to age, sex and previous medical history in patients with chest pain.

DESIGN

Prospective observational cohort study.

SETTING

Two-centre study in a Swedish county emergency medical service (EMS) organisation.

PARTICIPANTS

Unselected inclusion of 2917 patients with chest pain cared for by the EMS during 2018.

DATA ANALYSIS

Multivariate analysis on the association between symptom characteristics, patients' sex, age, previous acute coronary syndrome (ACS) or diabetes and the final outcome of acute myocardial infarction (AMI).

RESULTS

Symptomology in patients assessed by the EMS due to acute chest pain varied with sex and age and also with previous ACS or diabetes. Women suffered more often from nausea (OR 1.6) and pain in throat (OR 2.1) or back (OR 2.1). Their pain was more often affected by palpation (1.7) or movement (OR 1.4). Older patients more often described pain onset while sleeping (OR 1.5) and that the onset of symptoms was slow, over hours rather than minutes (OR 1.4). They were less likely to report pain in other parts of their body than their chest (OR 1.4). They were to a lesser extent clammy (OR 0.6) or nauseous (OR 0.6). These differences were present regardless of whether the symptoms were caused by AMI or not.

CONCLUSIONS

A number of aspects of the symptom of chest pain appear to differ in unselected prehospital patients with chest pain in relation to age, sex and medical history, regardless of whether the chest pain was caused by a myocardial infarction or not. This complicates the possibility in prehospital care of using symptoms to predict the underlying aetiology of acute chest pain.

Pulmonary Embolism in Women: A Systematic Review of the Current Literature

Cardiovascular disease is the leading cause of death in women. Pulmonary embolism (PE) is the third most-common cause of cardiovascular death, after myocardial infarction (MI) and stroke. We aimed to evaluate the attributes and outcomes of PE specifically in women and explore sex-based differences. We conducted a systematic review of the literature using electronic databases PubMed and Embase up to 1 April 2022 to identify studies investigating PE in women. Of the studies found, 93 studies met the eligibility criteria and were included. The risk of PE in older women (especially >40 years of age) superseded that of age-matched men, although the overall age- and sex-adjusted incidence of PE was found to be lower in women. Risk factors for PE in women included age, rheumatologic disorders, hormone replacement therapy or oral contraceptive pills, pregnancy and postpartum period, recent surgery, immobilization, trauma, increased body mass index, obesity, and heart failure. Regarding pregnancy, a relatively higher incidence of PE has been observed in the immediate postpartum period compared to the antenatal period. Women with PE tended to be older, presented more often with dyspnea, and were found to have higher NT-proBNP levels compared to men. No sex-based differences in in-hospital mortality and 30-day all-cause mortality were found. However, PE-related mortality was higher in women, particularly in hemodynamically stable patients. These differences form the basis of future research and outlets for reducing the incidence, morbidity, and mortality of PE in women.

Perceived posttraumatic growth in cardiac patients: A systematic scoping review

Despite the life-threatening nature of many cardiac conditions, patients often report perceived posttraumatic growth (PPTG) in their recovery. To date, this research remains scattered across the literature, and no systematic review across cardiac patient populations is available. To understand the state of the literature on PPTG in cardiac patients, we conducted a systematic scoping review, aiming to (a) describe patient populations included, (b) characterize associations between PPTG and mental and physical health indices, (c) identify potential psychosocial resources that moderate or mediate the effects of a cardiac condition on PPTG, and (d) describe and critique study methodologies. A systematic search was conducted on June 21, 2021, using the PubMed and PsycInfo databases. Two authors independently screened the results for eligibility and resolved discrepancies before extracting study data. We identified 21 studies that met the search and eligibility criteria (i.e., original, peer-reviewed, English language). Most studies focused on a single cardiac condition (61.9%), with myocardial infarction the most common. PPTG was studied in relation to myriad mental health and physical health indices. The findings suggested that appraisal and coping may mediate and psychosocial resources (e.g., social support) may moderate the effects of a cardiac condition on PPTG. The generalizability of results is limited, as most studies employed a cross-sectional design with mostly male and majority White samples. Future research would benefit from studying PPTG in more diverse cardiac populations, assessing appraisals of the cardiac condition as traumatic, measuring posttraumatic depreciation in tandem with PPTG, and conducting prospective studies.

Vitamin D3 intake as modulator for the early biomarkers of myocardial tissue injury in diabetic hyperlipidaemic rats

CONTEXT

Myocardial cell death occurs within hours following the onset of myocardial ischaemia and its chief cause is atherosclerosis. There is a link between vitamin D3 deficiency and many cardiovascular risk factors.

OBJECTIVE

This study compared the effect of vitamin D3 on early biomarkers of myocardial injury, to that of atorvastatin.

METHODS

Diabetic hyperlipidaemia was induced in Wistar rats, which were divided into 3 groups: diabetic hyperlipidaemic control, diabetic hyperlipidaemic rats treated with atorvastatin and diabetic hyperlipidaemic rats treated with vitamin D3. Blood glucose, glycated haemoglobin and lipid profile were evaluated. Markers of myocardial injury were examined including cardiac troponin, heart fatty acid binding protein (HFABP) and C-terminal pro-endothelin-1 (CT-pro-ET-1).

RESULTS

Vitamin D3 and atorvastatin intake improved lipid profile and glucose homeostasis, and reduced levels of predictive biomarkers of myocardial injury.

CONCLUSION

Vitamin D3 can be used in a suitable dose as a safe and protective candidate against myocardial injury.

Sex differences in clinical presentation and risk stratification in the Emergency Department: An observational multicenter cohort study

OBJECTIVE

The aim of this study was to investigate whether sex differences exist in disease presentations, disease severity and (case-mix adjusted) outcomes in the Emergency Department (ED).

METHODS

Observational multicenter cohort study using the Netherlands Emergency Department Evaluation Database (NEED), including patients ≥ 18 years of three Dutch EDs. Multivariable logistic regression was used to study the associations between sex and outcome measures in-hospital mortality and Intensive Care Unit/Medium Care Unit (ICU/MCU) admission in ED patients and in subgroups triage categories and presenting complaints.

RESULTS

Of 148,825 patients, 72,554 (48.8%) were females. Patient characteristics at ED presentation and diagnoses (such as pneumonia, cerebral infarction, and fractures) were comparable between sexes at ED presentation. In-hospital mortality was 2.2% in males and 1.7% in females. ICU/MCU admission was 4.7% in males and 3.1% in females. Males had higher unadjusted (OR 1.34(1.25-1.45)) and adjusted (AOR 1.34(1.24-1.46)) risks for mortality, and unadjusted (OR 1.54(1.46-1.63)) and adjusted (AOR 1.46(1.37-1.56)) risks for ICU/MCU admission. Males had higher adjusted mortality and ICU/MCU admission for all triage categories, and with almost all presenting complaints except for headache.

CONCLUSIONS

Although patient characteristics at ED presentation for both sexes are comparable, males are at higher unadjusted and adjusted risk for adverse outcomes. Males have higher risks in all triage categories and with almost all presenting complaints. Future studies should investigate reasons for higher risk in male ED patients.

Gender differences, inequalities and biases in the management of Acute Coronary Syndrome

OBJECTIVE

The approach to Acute Coronary Syndrome from a gender perspective is relatively recent. Research is extensive at epidemiological and clinical levels. However, available evidence, besides neglecting the social dimensions of the disease, has made women invisible. The objective of this review was to analyze the inequalities and gender biases in Acute Coronary Syndrome, from the beginning of the disease process to the final resolution.

METHODS

An exhaustive review of the literature of the entire health care process, from risk factors to rehabilitation and recovery, was carried out. The search for articles on gender, gender inequalities, or gender bias was conducted in indexed journals of social and health sciences. Also, a specific search was performed for each stage of the process, such as risk factors, prehospital phase, diagnosis, treatment, and rehabilitation.

RESULTS

Results showed the presence of gender biases throughout the entire health care process in Acute Coronary Syndrome. It is shown gender inequalities in the access to medical care, including a poor recognition among women themselves as well as among health professionals; longer prehospital delays; inadequate diagnoses and treatments; or less assistance to cardiac rehabilitation programmes. These biases occurred at the different levels of the health services involved. Finally, this review included recommendations proposed or arising from the revised papers.

CONCLUSIONS

Reducing gender biases in Acute Coronary Syndrome implies developing strategies to raise awareness among women, improve training of professionals serving at the different levels of health services, reduce delays, develop health management measures, and promote a research agenda.

Digital Microfluidic Thermal Control Chip-Based Multichannel Immunosensor for Noninvasively Detecting Acute Myocardial Infarction

Rapid and automated detection of acute myocardial infarction (AMI) at its developing stage is very important due to its high mortality rate. To quantitatively diagnose AMI, Myo, CK-MB, and cTnI are chosen as three biomarkers, which are usually detected through an immunosorbent assay, such as the enzyme-linked immunosorbent assay. However, the approach poses many drawbacks, such as long detection time, the cumbersome process, the need for professionals, and the difficulty of realizing automatic operation. Here, a multichannel digital microfluidic (DMF) thermal control chip integrated with a sandwich-based immunoassay strategy is proposed for the automated, rapid, and sensitive detection of AMI biomarkers. A miniaturized temperature control module is integrated on the back of the DMF chip, meeting the temperature requirement for the immunoassay. With this DMF thermal control chip, sample and reagent consumption are reduced to several microliters, significantly alleviating reagent consumption and sample dependence, and the automated and multichannel detection of biomarkers can be achieved. In this work, the simultaneously noninvasive detection of the human serum sample containing the three biomarkers of AMI is also achieved within 30 min, which improves the diagnostic accuracy of AMI. Due to the features of automation and miniaturization, the multichannel immunosensor can be used in community hospitals to increase the speed of diagnosis of patients with various acute diseases.

Serum Level of Vitamin D Is Associated with Severity of Coronary Atherosclerosis in Postmenopausal Women

Background: Postmenopausal women experience rapid progression of coronary artery disease. Vitamin D deficiency appears to be a modifiable risk factor for cardiovascular diseases. This study aimed to analyze the impact of 25-hydroxyvitamin D3 (25(OH)D) level on the severity of coronary atherosclerosis and its potential cardioprotective effect in postmenopausal women. Material and Methods: The study prospectively recruited 351 women in postmenopausal age undergoing coronary angiography. The severity of coronary atherosclerosis was assessed using the Coronary Artery Surgery Study Score (CASSS). A level of 25(OH)D was measured with electrochemiluminescence. Results: Women with more severe coronary atherosclerosis have significantly lower 25(OH)D serum level (p = 0.0001). Vitamin D (β = -0.02; p = 0.016), hypertension (β = 0.44; p = 0.025), age (β = 0.02; p = 0.003), and history of MI (β = 0.63; p < 0.0001), were shown as CASSS determinants. Age, hyperlipidemia, and history of MI were found to determine the level of vitamin D (all p < 0.05). Women with a three-vessel disease hospitalized due to ACS, with a history of MI, hyperlipidemia and hypertension presented the lowest vitamin D level. Conclusions: Our study showed that lower serum 25(OH)D in postmenopausal women is associated with more significant stenosis in the coronary arteries. Therefore, we suggest considering low vitamin D level as a potential risk factor for coronary artery disease.

Do Women Have a Higher Mortality Risk Than Men following ICU Admission after Out-of-Hospital Cardiac Arrest? A Retrospective Cohort Analysis

Purpose: previous studies showed that women have a higher mortality risk than men after out-of-hospital cardiac arrest (OHCA). This sex difference may disappear after adjustment for cardiac arrest characteristics. Most studies also included patients who were not admitted to the intensive care unit (ICU). We analyzed whether sex impacts the mortality of ICU-admitted OHCA patients. Methods: a retrospective cohort analysis of 1240 OHCA patients admitted to the ICU (310 women, 25%, Age_Median 64.0 (IQR 53.8–73.0)) at an academic hospital in the Netherlands between 1 January 2007 and 31 December 2018. The primary outcome was 90-day mortality; the secondary outcome was a favorable cerebral performance category (CPC) score at ICU discharge and ICU length of stay (ICU LOS). Results: we found no association between sex and 90-day mortality (hazard ratio (HR) 0.867; 95% confidence interval (95% CI) 0.678–1.108) after adjusting for relevant cardiac arrest characteristics. Similarly, we found no difference for favorable CPC score (OR 1.117; 95% CI 0.777–1.608) or ICU LOS between sexes (Beta 0.428; 95% CI −0.442 to 1.298). Conclusions: after adjusting for cardiac arrest characteristics, we found no difference between women and men with respect to 90-day mortality, ICU LOS, and CPC score.

Chronic stress exposure in men and women, and implications for the course of fatigue after percutaneous coronary intervention; the THORESCI study

BACKGROUND

Fatigue is a prevalent symptom in patients with coronary heart disease (CHD). Individual differences in chronic stress may affect the experience and persistence of fatigue, and this may vary between the sexes. Therefore, we studied the effect of chronic stress on the course of fatigue over a 2-year period after percutaneous coronary intervention (PCI), and examined the moderating effects of sex.

METHODS

1682 patients (78% men, age = 67.1 ± 10.6) were recruited and filled out multiple self-report questionnaires at baseline, one, 12, and 24 months post-PCI, including questions on demographics, fatigue (HCS). Multiple chronic stressors were assessed at baseline: work stress (ERI16), marital stress (MMQ-6), early life events (Life Events Questionnaire) and social stress. Latent class factor analysis (LatentGOLD) was used to construct a comprehensive chronic stress index. Linear mixed modeling examined the predictive quality of predictors and covariates.

RESULTS

Fatigue was found to substantially decrease over the first month post-PCI, then stabilized at a moderate level. Chronic stress impacted both the level and course of fatigue by increasing its level and delaying recovery. Overall and across time, women reported more fatigue than men. The level and course effects of chronic stress and sex were independent of demographic, health behavioral, and medical covariates.

CONCLUSIONS

Individual differences in chronic stress impact both the level and course of fatigue post-PCI, with women being affected most. Future research could further explain the mechanisms underlying the observed relationships. Developing and testing interventions focusing on exercise and stress-reduction could be used to alleviate fatigue.

Metabolic syndrome and myocardial infarction in women

Metabolic syndrome (MetS) represents a cluster of metabolic disorders that arise from insulin resistance (IR) and adipose tissue dysfunction. As a consequence, there is an increased risk for type 2 diabetes mellitus and atherosclerotic cardiovascular disease (CVD). MetS is associated with a 2-fold increase in cardiovascular outcomes. Earlier population analyses showed a lower prevalence of MetS in women (23.9%) in comparison to men (27.8%), while later analyses suggested significantly reduced difference due to an increase in prevalence in women aged between 20 and 39. However, the prevalence of MetS in specific populations of women, such as in women with polycystic ovary syndrome, ranges from 16% to almost 50% in some geographic regions. Abdominal fat accumulation and IR syndrome are recognized as the most important factors in the pathogenesis of MetS. After menopause, a decline in insulin sensitivity corresponds to an increase in fat mass, circulating fatty acids, low-density lipoproteins, and triglycerides. Prevalence of MetS in acute coronary syndrome (ACS) is significantly more present in women (55.9%-66.3%) than in men (40.2%-47.3%) in different cohorts. Younger women with ACS had a higher mortality rate than younger men. Acute myocardial infarction (AMI) remains a leading cause of death in aging women. Women with AMI have significantly higher rates of prior congestive heart failure, hypertension history, and diabetes. The role of androgens in CVD pathogenesis in women has not yet been clarified. The current review aims to give an insight into the role of MetS components and inflammation for the development of atherosclerosis, CVD, and AMI in women.

Gender Disparities in Cardiac Catheterization Rates Among Emergency Department Patients With Chest Pain

BACKGROUND

Previous studies have noted differences in rates of cardiac testing based on gender of patients. We evaluated cardiac catheterization rates for men and women presenting to the emergency department (ED) with chest pain, particularly among patients without a history of myocardial infarction (MI) or recent positive stress test.

METHODS

We performed a prospective evaluation of patients presenting to an urban, academic medical center for assessment of chest pain. We recorded baseline information, testing, and outcomes related to ED, observation unit, and inpatient stay. Primary outcomes included gender differences in cardiac catheterization and stenting rates among patients without an MI or positive stress test.

RESULTS

Over the 5.5 year study period, 2242 ED patients with chest pain participated in the study (45% male). Men and women had similar rates of cardiac stress testing (16.7% vs. 15.2%, P = 0.317) as well as similar rates of positive cardiac stress testing (2.9% vs. 1.9%, P = 0.116). Men were more likely to undergo cardiac catheterization (10.4% vs. 4.9%, P < 0.001). Men who had neither MI nor positive stress test were more likely than women to undergo cardiac catheterization: 5.8% versus 3.3%, P = 0.010. Similarly, men in this group were more likely to experience stent placement: 2.1% versus 0.7%, P = 0.003.

CONCLUSIONS

Similar to previous studies, we noted disparities in cardiac testing by gender. Men were more likely to go to cardiac catheterization without an MI or a positive stress test. This disparity in a more aggressive strategy of cardiac catheterization in men may result in higher stenting rates in this group.

Women have lower chances than men to be resuscitated and survive out-of-hospital cardiac arrest

Aims

Previous studies on sex differences in out-of-hospital cardiac arrest (OHCA) had limited scope and yielded conflicting results. We aimed to provide a comprehensive overall view on sex differences in care utilization, and outcome of OHCA.

Methods and results

We performed a population-based cohort-study, analysing all emergency medical service (EMS) treated resuscitation attempts in one province of the Netherlands (2006–2012). We calculated odds ratios (ORs) for the association of sex and chance of a resuscitation attempt by EMS, shockable initial rhythm (SIR), and in-hospital treatment using logistic regression analysis. Additionally, we provided an overview of sex differences in overall survival and survival at successive stages of care, in the entire study population and in patients with SIR. We identified 5717 EMS-treated OHCAs (28.0% female). Women with OHCA were less likely than men to receive a resuscitation attempt by a bystander (67.9% vs. 72.7%; P < 0.001), even when OHCA was witnessed (69.2% vs. 73.9%; P < 0.001). Women who were resuscitated had lower odds than men for overall survival to hospital discharge [OR 0.57; 95% confidence interval (CI) 0.48–0.67; 12.5% vs. 20.1%; P < 0.001], survival from OHCA to hospital admission (OR 0.88; 95% CI 0.78–0.99; 33.6% vs. 36.6%; P = 0.033), and survival from hospital admission to discharge (OR 0.49, 95% CI 0.40–0.60; 33.1% vs. 51.7%). This was explained by a lower rate of SIR in women (33.7% vs. 52.7%; P < 0.001). After adjustment for resuscitation parameters, female sex remained independently associated with lower SIR rate.

Conclusion

In case of OHCA, women are less often resuscitated by bystanders than men. When resuscitation is attempted, women have lower survival rates at each successive stage of care. These sex gaps are likely explained by lower rate of SIR in women, which can only partly be explained by resuscitation characteristics.

Factors affecting awareness of myocardial infarction symptoms among the general public in Korea

OBJECTIVES

We aimed to determine the level of awareness of myocardial infarction (MI) symptoms among the general public in Korea and identify factors affecting awareness of MI symptoms using data from the 2017 Korea Community Health Survey (KCHS).

METHODS

This is a cross-sectional study using KCHS data. Based on five questions about MI symptoms, participants were divided into an awareness group (replied ‘yes’ to all five questions) and an unawareness group (replied ‘no’ or ‘not sure’ to at least one of five questions) for analysis.

RESULTS

Of a total of 228,281 participants, 42.4% were aware of MI symptoms. There was a high level of awareness of chest pain and shortness of breath, but a low level of awareness of gastrointestinal symptoms and pain in the arm, shoulder, jaw, neck, and back. While women had a higher level of overall awareness relative to men, they showed a lower level of awareness regarding chest pain and discomfort. The factors affecting awareness of MI symptoms were gender, age, education level, occupation, smoking, drinking, physical inactivity, and cardiovascular disease risk factors.

CONCLUSIONS

In order to enhance awareness of MI symptoms among the general population, appropriate education and promotion efforts must be implemented based on gender, age, education level, and occupation. Moreover, active efforts by the government, educational institutions, and medical institutions are necessary to improve awareness of both typical and atypical MI symptoms. Furthermore, health policies to promote reduced smoking and drinking and increased physical activity, as well as continuous monitoring and management of individuals with cardiovascular disease risk factors, are required.

Sex Differences in Symptom Presentation in Acute Coronary Syndromes: A Systematic Review and Meta-analysis

Background Timely recognition of patients with acute coronary syndromes (ACS) is important for successful treatment. Previous research has suggested that women with ACS present with different symptoms compared with men. This review assessed the extent of sex differences in symptom presentation in patients with confirmed ACS. Methods and Results A systematic literature search was conducted in PubMed, Embase, and Cochrane up to June 2019. Two reviewers independently screened title-abstracts and full-texts according to predefined inclusion and exclusion criteria. Methodological quality was assessed using the Newcastle-Ottawa Scale. Pooled odds ratios (OR) with 95% CI of a symptom being present were calculated using aggregated and cumulative meta-analyses as well as sex-specific pooled prevalences for each symptom. Twenty-seven studies were included. Compared with men, women with ACS had higher odds of presenting with pain between the shoulder blades (OR 2.15; 95% CI, 1.95-2.37), nausea or vomiting (OR 1.64; 95% CI, 1.48-1.82) and shortness of breath (OR 1.34; 95% CI, 1.21-1.48). Women had lower odds of presenting with chest pain (OR 0.70; 95% CI, 0.63-0.78) and diaphoresis (OR 0.84; 95% CI, 0.76-0.94). Both sexes presented most often with chest pain (pooled prevalences, men 79%; 95% CI, 72-85, pooled prevalences, women 74%; 95% CI, 72-85). Other symptoms also showed substantial overlap in prevalence. The presence of sex differences has been established since the early 2000s. Newer studies did not materially change cumulative findings. Conclusions Women with ACS do have different symptoms at presentation than men with ACS, but there is also considerable overlap. Since these differences have been shown for years, symptoms should no longer be labeled as "atypical" or "typical."

Words Matter: Sex and Gender as Unique Variables in Research

Sex and gender are not equivalent concepts, even though these 2 variables are often used interchangeably by researchers. The precise use of variables is critical to ensure that research and theoretical work is of the highest quality. This article defines sex and gender and the importance of recognizing both of these variables as being unique and then demonstrates the benefit of measuring both of these variables using the cardiovascular disease literature as an exemplar. Additionally, recommendations for scholars regarding the use of sex and gender in the research and theoretical literature are provided.

Use and impact of the prehospital 12-lead ECG in the primary PCI era (PHECG2): protocol for a mixed-method study

Introduction

Use of the prehospital 12-lead ECG (PHECG) is recommended in patients presenting to emergency medical services (EMS) with suspected acute coronary syndrome (ACS). Prior research found that although PHECG use was associated with improved 30-day survival, a third of patients (typically women, the elderly and those with comorbidities) under EMS care did not receive a PHECG.

The overall aim of the PHECG2 study is to update evidence on care and outcomes for patients eligible for PHECG, specifically addressing the following research questions: (1) Is there a difference in 30-day mortality, and in reperfusion rate, between those who do and those who do not receive PHECG? (2) Has the proportion of eligible patients who receive PHECG changed since the introduction of primary percutaneous coronary intervention networks? (3) Are patients that receive PHECG different from those that do not in terms of social and demographic factors, or prehospital clinical presentation? (4) What factors influence EMS clinicians’ decisions to perform PHECG?

Methods and analysis

This is an explanatory, mixed-method study comprising four work packages (WPs). WP1 is a population-based, linked-data analysis of a national ACS registry (Myocardial Ischaemia National Audit Project). WP2 is a retrospective chart review of patient records from three large regional EMS. WP3 comprises focus groups of EMS personnel. WP4 will synthesise findings from WP1–3 to inform the development of an intervention to increase PHECG uptake.

Ethics and dissemination

The study has been approved by the London-Hampstead Research Ethics Committee (ref: 18LO1679). Findings will be disseminated through feedback to participating EMS, conference presentations and publication in peer-reviewed journals.

Trial registration number

NCT03699137

Communicating acute coronary syndrome risk to women in primary care: A scoping review of the literature

OBJECTIVES

Delay from symptom onset to hospital arrival drives poor outcomes in acute coronary syndrome (ACS), particularly for women. Primary care clinicians can discuss ACS with high-risk women, potentially reducing delay. We conducted a scoping review to assess what is known about ACS risk communication to women in primary care.

METHODS

We used Arksey and O'Malley's framework. The PubMed, CINAHL, PsycINFO, and Embase databases were searched for relevant articles from inception through September, 2018. No restrictions on study methodology were applied. At least two reviewers assessed each article. Articles addressing risk communication, coronary heart disease, and ACS, related to primary care settings, and including women were retained.

RESULTS

Eleven articles met inclusion criteria. Cardiovascular disease (CVD) risk communication is common in primary care; however, ACS symptoms are rarely discussed. Structured risk calculators are used to frame discussions. Communication styles include patient-centered discussions, paternalistic orders, and "scare tactics;" no single style is more effective. Analysis of gender differences in risk communication is extremely limited.

CONCLUSION

There is scant evidence that primary care clinicians communicate effectively about ACS risk, symptoms, and appropriate symptom response.

PRACTICE IMPLICATIONS

Interventions are needed to improve communication about ACS to at-risk women in the primary care setting.

Examining mechanisms for gender differences in admission to intensive care units

OBJECTIVE

To evaluate whether the male predominance of older people admitted to intensive care units (ICUs) is due to gender differences in the presence of spouses, partners, or children; rates of gender-specific disease; or triage decisions made by health system personnel.

DATA SOURCES AND COLLECTION

Three population-based datasets, 2004-2012, of Canadians ≥65 years: provincial health care data from Manitoba (n = 250 190) and national data of nursing home residents (n = 133 982) and community-based homecare recipients (n = 210 090).

STUDY DESIGN

Retrospective observational study, using multivariable Cox proportional hazards and logistic regression.

PRINCIPAL FINDINGS

Males predominated in ICU admissions: from Manitoba (hazard ratio [HR] = 1.87, 95% CI = 1.80-1.95), nursing homes (HR = 1.47, 1.35-1.60), and homecare (odds ratio = 1.14, 1.11-1.17). Adjustment for spouses, partners, and children did not attenuate this effect. The HR for gender was lower by 13.5 percent, relative, after excluding ICU care for cardiac causes. Male predominance was not present during a second ICU admission among survivors of a first ICU-containing hospitalization (HR = 1.07, 0.96-1.20).

CONCLUSIONS

In three older cohorts, the male predominance of ICU admission was not explained by gender differences in the presence of a spouse, partner, or children, or cardiac disease rates. The third finding suggests that triage bias is unlikely to be responsible for the male predominance.

The Gender Perspective Within the OFRECE Study: Differences in Health Care Among Patients Consulting for Chest Pain and/or Palpitations

INTRODUCTION AND OBJECTIVES

To analyze differences between sexes in the clinical management of patients presenting with symptoms of chest pain and/or palpitations within a population-based study.

METHODS

The OFRECE study included a random sample of 8400 individuals from the Spanish population aged 40 years and older; 1132 (13.5%) had previously consulted for chest pain and 1267 (15.1%) had consulted for palpitations and were included in the present study. We calculated both the crude and adjusted odds ratios (OR) of undergoing certain tests and the results of consultations by sex. Adjustment was performed by classic cardiovascular risk factors, a personal history of cardiovascular disease, and a diagnosis of stable angina or atrial fibrillation confirmed in the OFRECE study in each case.

RESULTS

No differences were observed in history of consultation for chest pain between women and men (13% vs 14.1%; P=.159) but differences were found in palpitations (19% vs 10.4%, respectively; P <.001). Women who had previously consulted for chest pain underwent fewer echocardiograms (32.5% vs 45.3%, respectively; P <.001), were less frequently referred to a cardiologist (49.1% vs 60.1%; P <.001), were less often admitted to hospital (20.1% vs 39.4%; P <.001), and less frequently received a confirmed diagnosis (60.9 vs 71, 9; P <.001). After full adjustment, all differences decreased and become nonsignificant echocardiograms: adjusted OR, 0.81; 95%CI, 0.60-1.09; referral to a cardiologist: adjusted OR, 0.86; 95%CI, 0.63-1.16; hospital admission: adjusted OR, 0.76; 95%CI, 0.54-1.09). For palpitations, crude differences were smaller and all became nonsignificant after adjustment.

CONCLUSIONS

This study does not confirm the existence of sex-related bias in the management of chest pain and palpitations. However, such bias cannot be completely ruled out in diagnoses confirmed within the OFRECE study, which might limit its ability to detect sex-related differences in health care.

Gender differences in symptom misattribution for coronary heart disease symptoms and intentions to seek health care

Women are more likely to delay seeking care for coronary heart disease (CHD) symptoms than men. We tested whether this was because they are more likely to misattribute CHD symptoms. Data were collected in December 2016. Participants were 714 Amazon's Mechanical Turk (crowdsourcing marketplace) workers with US Internet Protocol (IP) addresses; 52% female (ages 35-77 years) made judgments about patients of their same gender described in vignettes. We used adjusted multivariable logistic, ordinal, and linear regression to test our hypotheses. Women had a higher odds of misattributing the symptoms of the target in the vignettes to non-cardiac causes than men (adjusted odds ratio [AOR] = 2.08, p < .001), despite having higher mean knowledge scores about CHD (4.49 vs. 4.03, p < .001) and rating their CHD risk as higher (25% more likely to get CHD vs. 19%, p = .025) than men. Women were also less likely than men to intend to seek care at an emergency department (b = -0.33, p = .024), and if they did intend to seek care, they were more likely to intend to wait to seek care (AOR = 2.37, p = .003). Symptom misattribution may partially account for women's lower likelihood of intending to seek care from an emergency department, which would be especially critical in emergency situations.

Gender bias in clinical decision making emerges when patients with coronary heart disease symptoms also have psychological symptoms

BACKGROUND

Delayed treatment may contribute to women's relatively higher morbidity and mortality from coronary heart disease (CHD). We tested whether disparities in treatment may be due to bias in diagnosis and treatment recommendations for women with psychological symptoms.

METHODS

Fourth year medical students (N = 225) from 13 U.S. medical schools were randomly assigned to make clinical decisions (CHD risk judgments, diagnosis, treatment recommendations) about one of four experimental vignette patients (male or female; with symptoms of depression and anxiety or without). Vignettes were presented as text via an online survey platform.

RESULTS

The female patient with psychological symptoms was perceived to be at lowest risk for CHD. Perceptions of risk partly mediated lower likelihood of recommending the female patient with psychological symptoms be seen in an emergency department, take medication, or receive nutrition or exercise advice relative to the male patient with psychological symptoms.

CONCLUSIONS

There was a gender bias in CHD clinical decision-making when patients had concurrent psychological symptoms.

Baseline characteristics, management practices, and long-term outcomes among patients with first presentation acute myocardial infarction in the Second Gulf Registry of Acute Coronary Events (Gulf RACE-II)

Background and objectives

Limited data are available highlighting the different clinical aspects of acute coronary syndrome (ACS) patients, especially in Gulf countries. In this study, we aimed to compare patients who presented with acute myocardial infarction (AMI) as the first presentation of patients who have a history of ACS in terms of initial presentation, medical history, laboratory findings, and overall mortality.

Methods

We used the Second Gulf Registry of Acute Coronary Events (Gulf RACE-II), which is a multinational observational study of 7930 ACS patients.

Results

Among all patients, 4723 (59.6%) patients presented with AMI. First presentation AMI patients were older (mean age, 55 years vs. 53 years; p < 0.001) and had lower risk factors than patients with a history of ACS. Higher laboratory readings of cardiac markers and all aspects of mortality were significantly higher among patients with first presentation AMI. After adjustments for baseline variables, congestive heart failure [odds ratio (OR) = 1.08; 95% confidence interval (CI), 0.73–1.57], reinfarction (OR = 1.16; 95% CI, 0.58–2.30), cardiogenic shock (OR = 1.51; 95% CI, 0.74–3.08), stroke (OR = 2.30; 95% CI, 0.29–17.99), and overall mortality (OR = 1.16; 95% CI = 0.74–1.83) were independent predictive factors for first presentation AMI.

Conclusions

First presentation AMI patients tend to be older and to have lower rates of risk factors. Adverse clinical outcomes such as congestive heart failure, reinfarction, cardiogenic shock, and stroke were higher among patients with first presentation AMI compared to patients with a history of ACS.

The second myocardial infarction: Is there any difference in symptoms and prehospital delay compared to the first myocardial infarction?

BACKGROUND

Knowledge is limited concerning the type of symptoms and the time from onset of symptoms to first medical contact at first and second myocardial infarction in the same patient.

AIM

This study aimed to describe the type of symptoms and the time from onset of symptoms to first medical contact in first and second myocardial infarctions in men and women affected by two myocardial infarctions. Furthermore, the aim was to identify factors associated with prehospital delays ≥2 h at second myocardial infarction.

METHODS

A retrospective cohort study with 820 patients aged 31-74 years with a first and a second myocardial infarction from 1986 through 2009 registered in the Northern Sweden MONICA registry.

RESULTS

The most common symptoms reported among patients affected by two myocardial infarctions are typical symptoms at both myocardial infarction events. Significantly more women reported atypical symptoms at the second myocardial infarction compared to the first. Ten per cent of the men did not report the same type of symptoms at the first and second myocardial infarctions; the corresponding figure for women was 16.2%. The time from onset of symptoms to first medical contact was shorter at the second myocardial infarction compared to the first myocardial infarction. Patients with prehospital delay ≥2 h at the first myocardial infarction were more likely to have a prehospital delay ≥2 h at the second myocardial infarction.

CONCLUSIONS

Symptoms of second myocardial infarctions are not necessarily the same as those of first myocardial infarctions. A patient's behaviour at the first myocardial infarction could predict how he or she would behave at a second myocardial infarction.

Symptoms Suggestive of Acute Coronary Syndrome: When Is Sex Important?

BACKGROUND

Studies have identified sex differences in symptoms of acute coronary syndrome (ACS); however, retrospective designs, abstraction of symptoms from medical records, and variations in assessment forms make it difficult to determine the clinical significance of sex differences.

OBJECTIVE

The aim of this study is to determine the influence of sex on the occurrence and distress of 13 symptoms for patients presenting to the emergency department for symptoms suggestive of ACS.

METHODS

A total of 1064 patients admitted to 5 emergency departments with symptoms triggering a cardiac evaluation were enrolled. Demographic and clinical variables, symptoms, comorbid conditions, and functional status were measured.

RESULTS

The sample was predominantly male (n = 664, 62.4%), white (n = 739, 69.5%), and married (n = 497, 46.9%). Women were significantly older than men (61.3 ± 14.6 vs 59.5 ± 13.6 years). Most patients were discharged with a non-ACS diagnosis (n = 590, 55.5%). Women with ACS were less likely to report chest pain as their chief complaint and to report more nausea (odds ratio [OR], 1.56; confidence interval [CI], 1.00-2.42), shoulder pain (OR, 1.76; CI, 1.13-2.73), and upper back pain (OR, 2.92; CI, 1.81-4.70). Women with ACS experienced more symptoms (6.1 vs 5.5; P = .026) compared with men. Men without ACS had less symptom distress compared with women.

CONCLUSIONS

Women and men evaluated for ACS reported similar rates of chest pain but differed on other classic symptoms. These findings suggest that women and men should be counseled that ACS is not always accompanied by chest pain and multiple symptoms may occur simultaneously.

Estrogen weakens muscle endurance via estrogen receptor-p38 MAPK-mediated orosomucoid (ORM) suppression

Gender differences in fatigue manifest as females being more prone to feel exhaustion and having lower muscle endurance. However, the mechanisms of these effects remain unclear. We investigated whether orosomucoid, an endogenous anti-fatigue protein that enhances muscle endurance, is involved in this regulation. Female rats exhibited lower muscle endurance, and this gender difference disappeared in orosomucoid-1-deficient mice. Female rats also exhibited weaker orosomucoid induction in serum, liver and muscle in response to fatigue compared with male rats. Ovariectomy elevated orosomucoid levels and increased swimming time, and estrogen replenishment reversed these effects. Exogenous estrogen treatment in male and female mice produced opposite effects. Estrogen decreased orosomucoid expression and its promoter activity in C2C12 muscle and Chang liver cells in vitro, and estrogen receptor or p38 mitogen-activated protein kinase blockade abolished this effect. Therefore, estrogen negatively regulates orosomucoid expression that is responsible for the weaker muscle endurance in females.

Gender differences in the use of cardiovascular interventions in HIV-positive persons; the D:A:D Study

INTRODUCTION

There is paucity of data related to potential gender differences in the use of interventions to prevent and treat cardiovascular disease (CVD) among HIV-positive individuals. We investigated whether such differences exist in the observational D:A:D cohort study.

METHODS

Participants were followed from study enrolment until the earliest of death, six months after last visit or February 1, 2015. Initiation of CVD interventions [lipid-lowering drugs (LLDs), angiotensin-converting enzyme inhibitors (ACEIs), anti-hypertensives, invasive cardiovascular procedures (ICPs) were investigated and Poisson regression models calculated whether rates were lower among women than men, adjusting for potential confounders.

RESULTS

Women (n = 12,955) were generally at lower CVD risk than men (n = 36,094). Overall, initiation rates of CVD interventions were lower in women than men; LLDs: incidence rate 1.28 [1.21, 1.35] vs. 2.40 [2.34, 2.46]; ACEIs: 0.88 [0.82, 0.93] vs. 1.43 [1.39, 1.48]; anti-hypertensives: 1.40 [1.33, 1.47] vs. 1.72 [1.68, 1.77] and ICPs: 0.08 [0.06, 0.10] vs. 0.30 [0.28, 0.32], and this was also true for most CVD interventions when exclusively considering periods of follow-up for which individuals were at high CVD risk. In fully adjusted models, women were less likely to receive CVD interventions than men (LLDs: relative rate 0.83 [0.78, 0.88]; ACEIs: 0.93 [0.86, 1.01]; ICPs: 0.54 [0.43, 0.68]), except for the receipt of anti-hypertensives (1.17 [1.10, 1.25]).

CONCLUSION

The use of most CVD interventions was lower among women than men. Interventions are needed to ensure that all HIV-positive persons, particularly women, are appropriately monitored for CVD and, if required, receive appropriate CVD interventions.

Identification of risk genes associated with myocardial infarction based on the recursive feature elimination algorithm and support vector machine classifier

The aim of the present study was to identify risk genes in myocardial infarction. Microarray data GSE34198, containing data from the peripheral blood of 49 myocardial infarction samples and 48 corresponding control samples, were downloaded from the Gene Expression Omnibus database to screen the differentially expressed genes (DEGs). The DEGs were used to construct a protein-protein interaction (PPI) network of patient samples, from which the feature genes were identified using the neighboring score method. The recursive feature elimination (RFE) algorithm was employed to select the risk genes among feature genes, which were subsequently applied to perform a support vector machine (SVM) classifier to identify the specific signature in myocardial infarction samples. Another dataset, GSE61144, was also downloaded to verify the efficacy of the classifier. A total of 724 downregulated and 483 upregulated DEGs were screened in patient samples compared with control samples in the GSE34198 dataset. The PPI network of myocardial infarction was comprised of 1,083 nodes (genes) and 46,363 lines (connections). Using the neighborhood scoring method, the top 100 feature genes in myocardial infarction samples were identified as the disease feature genes, which distinguish the myocardial infarction samples from the control samples. The RFE algorithm screened 15 risk genes, which were employed to construct a SVM classifier with an average precision of 88% to the patient sample following visualization by a confusion matrix. The predictive precision of the classifier on another microarray dataset, GSE61144, was 0.92, with an average true positive of 0.9278 and an average false positive of 0.2361. A-kinase-anchoring protein 12 (AKAP12) and glycine receptor α2 (GLRA2) were two risk genes in the SVM classifier. Therefore, AKAP12 and GLRA2 exert potential roles in the development of myocardial infarction, potentially by influencing cardiac contractility and protecting against ischemia-reperfusion injury, which may provide clues in developing potential diagnostic biomarkers or therapeutic targets for myocardial infarction.

An integrative review of fatigue experienced by women before and during myocardial infarction

AIMS AND OBJECTIVES

To explore the extant literature for key features of prodromal and acute myocardial infarction fatigue experienced by women, including estimates of severity, narrative descriptors, impacts on activities of daily living and frequency, and to describe what is known from the current evidence base.

BACKGROUND

Several studies, conducted across the globe, have investigated prodromal and acute myocardial infarction symptoms experienced by women and suggested that fatigue is prevalent, and they have also sporadically described specific characteristics of fatigue, such as narrative descriptors and severity. However, no review specific to this acute and prodromal fatigue could be located in the literature.

DESIGN

Integrative review, guided by Whittemore and Knafl's approach and the Theory of Unpleasant Symptoms.

METHODS

We used a comprehensive, systematic approach to searching, screening, selecting, evaluating and analysing the records. Data were collected in February 2017.

RESULTS

Twenty-one articles were included in the review, including nine quantitative, six qualitative and six mixed-methods studies, with the majority (14) published in the USA. The average age of participants across the studies was the early 60s. Distress, quality, intensity and timing of prodromal myocardial infarction fatigue were more completely described in the literature than acute myocardial infarction fatigue.

CONCLUSIONS

Fatigue is the most common prodromal myocardial infarction symptom experienced by women and is also a common acute symptom. Additional research exploring prodromal and acute myocardial infarction fatigue is necessary.

RELEVANCE TO CLINICAL PRACTICE

As healthcare professionals work with women across the healthcare spectrum, recognising fatigue as an important potential myocardial infarction symptom is essential. Not only can women be educated about this symptom and other possible myocardial infarction symptoms, but clinicians can consider fatigue as an important symptom in a constellation of factors when evaluating women's health and the potential for coronary disease and myocardial infarction.

Using the McSweeney Acute and Prodromal Myocardial Infarction Symptom Survey to Predict the Occurrence of Short-Term Coronary Heart Disease Events in Women

BACKGROUND

Few instruments capture symptoms that predict cardiac events in the short-term. This study examines the ability of the McSweeney Acute and Prodromal Myocardial Infarction Symptom Survey to predict acute cardiac events within 3 months of administration and to identify the prodromal symptoms most associated with short-term risk in women without known coronary heart disease.

METHODS

The McSweeney Acute and Prodromal Myocardial Infarction Symptom Survey was administered to 1,097 women referred to a cardiologist for initial coronary heart disease evaluation. Logistic regression models were used to examine prodromal symptoms individually and in combination to identify the subset of symptoms most predictive of an event within 3 months.

RESULTS

Fifty-one women had an early cardiac event. In bivariate analyses, 4 of 30 prodromal symptoms were significantly associated with event occurrence within 90 days. In adjusted analyses, women reporting arm pain or discomfort and unusual fatigue were more likely (OR, 4.67; 95% CI, 2.08-10.48) to have a cardiac event than women reporting neither.

CONCLUSIONS

The McSweeney Acute and Prodromal Myocardial Infarction Symptom Survey may assist in predicting short-term coronary heart disease events in women without known coronary heart disease.

Acute coronary syndrome in relation to the occurrence of associated symptoms: A quantitative study in prehospital emergency care

INTRODUCTION

Acute chest pain is a common symptom among prehospital emergency care patients. Therefore, it is crucial that ambulance nurses (ANs) have the ability to identify symptoms and assess patients suffering from acute coronary syndrome (ACS). The aim of this study is to explore the occurrence of dyspnoea and nausea and/or vomiting in the prehospital phase of a suspected ACS and the associations with patients' outcome.

METHODS

This study has a quantitative design based on data from hospital records and from a previous interventional study (randomised controlled trial) including five Emergency Medical Service (EMS) systems in western Sweden in the years 2008-2010.

RESULTS

In all, 1836 patients were included in the interventional study. Dyspnoea was reported in 38% and nausea and/or vomiting in 26% of patients. The risk of death within one year increased with the presence of dyspnoea. The presence of nausea and/or vomiting increased the likelihood of a final diagnosis of acute myocardial infarction (AMI).

CONCLUSION

This study shows that dyspnoea, nausea and/or vomiting increase the risk of death and serious diagnosis among ACS patients. This means that dyspnoea, nausea and/or vomiting should influence the ANs' assessment and that special education in cardiovascular nursing is required.

Cardiac MRI left ventricular global function index and quantitative late gadolinium enhancement in unrecognized myocardial infarction

PURPOSE

To compare left ventricular global function index (LVGFI) and quantitative late gadolinium enhancement (LGE) in patients with unrecognized myocardial infarction (UMI), recognized myocardial infarction (RMI) and without myocardial infarction (MI).

MATERIAL AND METHODS

Under waiver of the Institutional Review Board 235 patients (age 63.5±10.5years, 57 female) were retrospectively evaluated. All patients had undergone cardiac MRI at 1.5T for symptoms of CAD. 67 patients (29%) had suffered a known RMI before. Functional imaging and full-intensity late gadolinium enhancement (LGE) imaging were evaluated for LVGFI and quantitative LGE mass.

RESULTS

Of 168 patients without history of RMI, 48 patients (29%) had UMI, 120 patients had no MI. LVGFI was lower in RMI patients (34±8% [range 16;52]), and UMI patients (35±8% [range 10;51]), compared to patients with no MI (38±7% [range 16;55]) respectively and similar between RMI and UMI patients. RMI patients had full-intensity LGE in 11±6% of left ventricular myocardial mass (LVMM). UMI patients had LGE in 9±5% of LVMM. RMI patients had significantly more LGE than UMI patients (p=0.0096).

CONCLUSION

LGE quantification is effective to assess infarction scar size in RMI and UMI patients. LVGFI provides information on cardiac function and morphology but does not allow for a reliable differentiation between patients with and without history of MI, due small differences and wide overlap of LVGFI values for all three patient groups. This may be a reason why LVGFI is not applied in clinical routine.

Clinical presentation of patients with spontaneous coronary artery dissection

BACKGROUND

Spontaneous coronary artery dissection (SCAD) is an infrequent but important cause of myocardial infarction (MI) especially in younger women. However, the clinical presentation and the acuity of symptoms prompting invasive management in SCAD patients have not been described. Understanding these presenting features may improve SCAD diagnosis and management.

METHODS

We reviewed SCAD patients who were prospectively followed at the Vancouver General Hospital SCAD Clinic. Their presenting symptoms and unstable features were obtained from detailed clinical histories and hospital admission documentation. Baseline characteristics, predisposing and precipitating conditions, angiographic findings, management strategies, in-hospital, and long-term events were recorded prospectively.

RESULTS

We included 196 SCAD patients who had complete documentation of their presenting symptoms. The majority were women (178/196; 90.8%) and all presented with MI (24.0% STEMI). The most frequent presenting symptom was chest discomfort, reported by 96%. Other symptoms included arm pain (49.5%), neck pain (22.1%), nausea or vomiting (23.4%), diaphoresis (20.9%), dyspnea (19.3%), and back pain (12.2%). Ventricular tachycardia/fibrillation occurred in 8.1% (16/196), with 1.0% having cardiac arrest. The time from symptom onset to hospital presentation was 1.1 ± 3.0 days. NSTEMI patients had longer delay for coronary angiography compared with STEMI (2.0 ± 2.5 days vs. 0.8 ± 1.7 days, P = 0.002). Overall, 34.2% had unstable symptoms upon arrival for coronary angiography. Those with unstable symptoms were more likely to undergo repeat angiography (65.7% vs. 50.4%, P = 0.049), and repeat or unplanned revascularization (14.9% vs. 5.4%, P = 0.033) during acute hospitalization.

CONCLUSION

Chest discomfort was the most frequent presenting symptom with SCAD and one-third had unstable symptoms prompting urgent invasive angiography. © 2017 Wiley Periodicals, Inc.

A Qualitative Study of Symptom Experiences of Women With Acute Coronary Syndrome

BACKGROUND

Most studies show that women with symptoms of acute coronary syndrome (ACS) delay seeking care longer than men do. Contributing factors include women being more likely to experience diverse symptoms, to experience symptoms that do not match preexisting symptom expectations, to interpret symptoms as noncardiac, and to minimize symptoms until they become incapacitating.

OBJECTIVE

The aim of the study is to identify factors influencing women's ability to recognize and accurately interpret symptoms of suspected ACS.

METHODS

This qualitative study used in-depth interviews with 18 women diagnosed with ACS to determine how they recognized, interpreted, and acted on symptoms. An interview guide developed from the author's initial research was used to provide structure for the process.

RESULTS

All of the women went through a process of recognizing and interpreting their symptoms. Eight women had symptoms arise abruptly. Most of these women recognized a change immediately, "knew" to go for treatment, and did so quickly. Three women had vague symptoms that started slowly, converting unexpectedly to intense symptoms prompting them to seek care urgently. The remaining 7 women had evolving symptoms, were more likely to interpret symptoms as unrelated to their heart, and avoided disclosing symptoms to others. Despite recognizing that the situation may be serious, women with evolving symptoms adopted a wait-and-see approach.

CONCLUSION

Women with less severe, intermittent, or evolving symptoms are at increased risk for delayed presentation, diagnosis, and treatment for ACS. These women should be targeted for educational and behavioral interventions.

Recognizing Myocardial Infarction in Women: A Case Study

: The author presents the case of a 52-year-old woman who experienced symptoms of myocardial infarction (MI) over many months; neither her clinicians nor the patient-herself a nurse-recognized them. The author discusses the signs and symptoms of MI in women and highlights how failure to recognize them may lead to misdiagnosis and even death. This case illustrates how important it is that health care providers consider the possibility of heart disease in any woman whose symptoms could be cardiac in origin, even when the cause appears to be something else.