Three decades of demographic trends among academic emergency physicians.

Purpose: To describe trends in emergency medicine faculty demographics, examining changes in the proportion of historically underrepresented groups including female, Black, and Latinx faculty over time. Methods: Data from the Association of American Medical Colleges faculty roster (1990-2020) were used to assess the changing demographics of full-time emergency medicine faculty. Descriptive statistics, graphic visualizations, and logistic regression modeling were used to illustrate trends in the proportion of female, Black, and Latinx faculty. Odds ratios (OR) were used to describe the estimated annual rate of change of underrepresented demographic groups. Results: The number of full-time emergency medicine faculty increased from 214 in 1990 to 5874 in 2020. Female emergency medicine faculty demonstrated increases in representation overall, from 35 (16.36%) in 1990 to 2247 (38.25%) in 2020, suggesting a 3% estimated annual rate of increase (OR 1.03, 95% CI 1.03-1.04) and within each academic rank. A very small positive trend was noted among Latinx faculty (n = 3, 1.40% in 1990 to n = 326, 5.55% in 2020; OR 1.01, 95% CI 1.01-1.02), whereas an even smaller, statistically insignificant increase was observed among Black emergency medicine faculty during the 31-year study period (N = 9, 4.21% in 1990 and N = 266, 4.53% in 2020; OR 1.00, 95% CI 0.99-1.00). Conclusions: Although female physicians have progressed toward equitable representation among academic emergency medicine faculty, no meaningful progress has been made toward racial parity. The persistent underrepresentation of Black and Latinx physicians in the academic emergency medicine workforce underscores the need for urgent structural changes to address contemporary manifestations of racism in academic medicine and beyond.

COVID-19 Seroprevalence in ED Health Care Professionals Study: A Cross-Sectional Study.

INTRODUCTION: ED health care professionals are at the frontline of evaluation and management of patients with acute, and often undifferentiated, illness. During the initial phase of the SARS-CoV-2 outbreak, there were concerns that ED health care professionals may have been at increased risk of exposure to SARS-CoV-2 due to difficulty in early identification of patients. This study assessed the seroprevalence of SARS-CoV-2 antibodies among ED health care professionals without confirmed history of COVID-19 infection at a quaternary academic medical center. METHODS: This study used a cross-sectional design. An ED health care professional was deemed eligible if they had worked at least 4 shifts in the adult emergency department from April 1, 2020, through May 31, 2020, were asymptomatic on the day of blood draw, and were not known to have had prior documented COVID-19 infection. The study period was December 17, 2020, to January 27, 2021. Eligible participants completed a questionnaire and had a blood sample drawn. Samples were run on the Roche Cobas Elecsys Anti-SARS-CoV-2 antibody assay. RESULTS: Of 103 health care professionals (16 attending physicians, 4 emergency residents, 16 advanced practice professionals, and 67 full-time emergency nurses), only 3 (2.9%; exact 95% CI, 0.6%-8.3%) were seropositive for SARS-CoV-2 antibodies. DISCUSSION: At this quaternary academic medical center, among those who volunteered to take an antibody test, there was a low seroprevalence of SARS-CoV-2 antibodies among ED clinicians who were asymptomatic at the time of blood draw and not known to have had prior COVID-19 infection.

Neighborhood Disadvantage Measures and COVID-19 Cases in Boston, 2020.

OBJECTIVE: Understanding the pattern of population risk for coronavirus disease 2019 (COVID-19) is critically important for health systems and policy makers. The objective of this study was to describe the association between neighborhood factors and number of COVID-19 cases. We hypothesized an association between disadvantaged neighborhoods and clusters of COVID-19 cases. METHODS: We analyzed data on patients presenting to a large health care system in Boston during February 5-May 4, 2020. We used a bivariate local join-count procedure to determine colocation between census tracts with high rates of neighborhood demographic characteristics (eg, Hispanic race/ethnicity) and measures of disadvantage (eg, health insurance status) and COVID-19 cases. We used negative binomial models to assess independent associations between neighborhood factors and the incidence of COVID-19. RESULTS: A total of 9898 COVID-19 patients were in the cohort. The overall crude incidence in the study area was 32 cases per 10 000 population, and the adjusted incidence per census tract ranged from 2 to 405 per 10 000 population. We found significant colocation of several neighborhood factors and the top quintile of cases: percentage of population that was Hispanic, non-Hispanic Black, without health insurance, receiving Supplemental Nutrition Assistance Program benefits, and living in poverty. Factors associated with increased incidence of COVID-19 included percentage of population that is Hispanic (incidence rate ratio [IRR] = 1.25; 95% CI, 1.23-1.28) and percentage of households living in poverty (IRR = 1.25; 95% CI, 1.19-1.32). CONCLUSIONS: We found a significant association between neighborhoods with high rates of disadvantage and COVID-19. Policy makers need to consider these health inequities when responding to the pandemic and planning for subsequent health needs.

The cases not seen: Patterns of emergency department visits and procedures in the era of COVID-19.

OBJECTIVE: Prior data suggest Emergency Department (ED) visits for many emergency conditions decreased during the initial COVID-19 surge. However, the pandemic's impact on the wide range of conditions seen in EDs, and the resources required for treating them, has been less studied. We sought to provide a comprehensive analysis of ED visits and associated resource utilization during the initial COVID-19 surge. METHODS: We performed a retrospective analysis from 5 hospitals in a large health system in Massachusetts, comparing ED encounters from 3/1/2020-4/30/2020 to identical weeks from the prior year. Data collected included demographics, ESI, diagnosis, consultations ordered, bedside procedures, and inpatient procedures within 48 h. We compared raw frequencies between time periods and calculated incidence rate ratios. RESULTS: ED volumes decreased by 30.9% in 2020 compared to 2019. Average acuity of ED presentations increased, while most non-COVID-19 diagnoses decreased. The number and incidence rate of all non-critical care ED procedures decreased, while the occurrence of intubations and central lines increased. Most subspecialty consultations decreased, including to psychiatry, trauma surgery, and cardiology. Most non-elective procedures related to ED encounters also decreased, including craniotomies and appendectomies. CONCLUSION: Our health system experienced decreases in nearly all non-COVID-19 conditions presenting to EDs during the initial phase of the pandemic, including those requiring specialty consultation and urgent inpatient procedures. Findings have implications for both public health and health system planning.

A Video-based Debriefing Program to Support Emergency Medicine Clinician Well-being During the COVID-19 Pandemic.

INTRODUCTION: Emergency clinicians on the frontline of the coronavirus pandemic experience a range of emotions including anxiety, fear, and grief. Debriefing can help clinicians process these emotions, but the coronavirus pandemic makes it difficult to create a physically and psychologically safe space in the emergency department (ED) to perform this intervention. In response, we piloted a video-based debriefing program to support emergency clinician well-being. We report the details of our program and results of our evaluation of its acceptability and perceived value to emergency clinicians during the pandemic. METHODS: ED attending physicians, resident physicians, and non-physician practitioners (NPP) at our quaternary-care academic medical center were invited to participate in role-based, weekly one-hour facilitated debriefings using Zoom. ED attendings with experience in debriefing led each session and used an explorative approach that focused on empathy and normalizing reactions. At the end of the pilot, we distributed to participants an anonymous 10-point survey that included multiple-answer questions and visual analogue scales. RESULTS: We completed 18 debriefings with 68 unique participants (29 attending physicians, 6 resident physicians, and 33 NPPs. A total of 76% of participants responded to our survey and 77% of respondents participated in at least two debriefings. Emergency clinicians reported that the most common reasons to participate in the debriefings were "to enhance my sense of community and connection" (81%) followed by "to support colleagues" (75%). Debriefing with members of the same role group (92%) and the Zoom platform (81%) were considered to be helpful aspects of the debriefing structure. Although emergency clinicians found these sessions to be useful (78.8 +/- 17.6) interquartile range: 73-89), NPPs were less comfortable speaking up (58.5 +/- 23.6) than attending physicians (77.8 +/- 25.0) (p = < 0.008). CONCLUSION: Emergency clinicians participating in a video-based debriefing program during the coronavirus pandemic found it to be an acceptable and useful approach to support emotional well-being. Our program provided participants with a platform to support each other and maintain a sense of community and connection. Other EDs should consider implementing a debriefing program to safeguard the emotional well-being of their emergency clinician workforce.

Patient Experiences With Transfer for Community Hospital Inpatient Admission From an Academic Emergency Department.

Emergency department (ED) crowding continues to be a major challenge and has important ramifications for patient care quality. One strategy to decrease ED crowding has been to implement alternative pathways to traditional hospital admission. Through a survey-based retrospective cohort study, we aimed to assess the patient experience for those who agreed to transfer and admission to an affiliated community hospital from a large, academic center's ED. In all, 85% of participants rated their overall experience as either great or good, 92% did not find it hard to make the decision to be transferred, and 95% found the transfer process itself to be easy.

Risk of Acute Myocardial Infarction and Ischemic Stroke in Patients with Asthma Exacerbation: A Population-Based, Self-Controlled Case Series Study.

BACKGROUND: Patients with asthma have a high incidence of acute myocardial infarction and ischemic stroke. OBJECTIVE: To investigate the acute effect of asthma exacerbation on these cardiovascular events. METHODS: Using population-based inpatient data of 3 geographically diverse US states (Florida, Nebraska, and New York) during the period 2011 to 2014, we conducted a self-controlled case series study of adults (aged ≥40 years) hospitalized with asthma exacerbation. The primary outcome was a composite of acute myocardial infarction and ischemic stroke. We used conditional Poisson regression to compare each patient's incidence rate of the outcome during 3 sequential risk periods (1-7, 8-14, and 15-28 days after asthma exacerbation) with that of the reference period (ie, summed period before and after the 3 risk periods). RESULTS: We identified 4607 adults hospitalized for asthma exacerbation who had a first episode of acute myocardial infarction or ischemic stroke. During the reference period, the incidence rate of acute myocardial infarction or ischemic stroke was 25.0/100 person-years. Compared with the reference period, the incidence rate significantly increased during the first risk period (129.1/100 person-years), with a corresponding adjusted incidence rate ratio of 5.04 (95% CI, 4.29-5.88; P < .001). In the 2 subsequent risk periods, the incidence rate declined but remained high-50.1/100 person-years (adjusted incidence rate ratio, 1.96; 95% CI, 1.51-2.48; P < .001) and 38.0/100 person-years (adjusted incidence rate ratio, 1.48; 95% CI, 1.20-1.81; P < .001), respectively. The findings were similar when the 2 outcomes were examined separately. CONCLUSIONS: In this population-based study of adults with asthma, the risk of acute myocardial infarction and ischemic stroke increased significantly after asthma exacerbation.

Impact of Urgent Care Openings on Emergency Department Visits to Two Academic Medical Centers Within an Integrated Health Care System.

STUDY OBJECTIVE: The effect of urgent cares on local emergency department (ED) patient volumes is presently unknown. In this paper, we aimed to assess the change in low-acuity ED utilization at 2 academic medical centers in relation to patient proximity to an affiliated urgent care. METHODS: We created a geospatial database of ED visits occurring between April 2016 and March 2018 to 2 academic medical centers in an integrated health care system, geocoded by patient home address. We used logistic regression to characterize the relationship between the likelihood of patients visiting the ED for a low-acuity condition, based on ED discharge diagnosis, and urgent care center proximity, defined as living within 1 mile of an open urgent care center, for each of the academic medical centers in the system, adjusting for spatial, temporal, and patient factors. RESULTS: We identified a statistically significant reduction in the likelihood of ED visits for low-acuity conditions by patients living within 1 mile of an urgent care center at 1 of the 2 academic medical centers, with an adjusted odds ratio of 0.87 (95% confidence interval 0.78 to 0.98). There was, however, no statistically significant reduction at the other affiliated academic medical center. Further analysis showed a statistically significant temporal relationship between time since urgent care center opening and likelihood of a low-acuity ED visit, with approximately a 1% decrease in the odds of a low-acuity visit for every month that the proximal urgent care center was open (odds ratio 0.99; 95% confidence interval 0.985 to 0.997). CONCLUSION: Although further research is needed to assess the factors driving urgent care centers' variable influence on low-acuity ED use, these findings suggest that in similar settings urgent care center development may be an effective strategy for health systems hoping to decrease ED utilization for low-acuity conditions at academic medical centers.

Impact of a Multidisciplinary Treatment Pathway for Atrial Fibrillation in the Emergency Department on Hospital Admissions and Length of Stay: Results of a Multi-Center Study.

Background Variability in the management of atrial fibrillation (AF) in the emergency department (ED) leads to avoidable hospital admissions and prolonged length of stay (LOS). In a retrospective single-center study, a multidisciplinary AF treatment pathway was associated with a reduced hospital admission rate and reduced LOS. To assess the applicability of the AF pathway across institutions, we conducted a 2-center study. Methods and Results We performed a prospective, 2-stage study at 2 tertiary care hospitals. During the first stage, AF patients in the ED received routine care. During the second stage, AF patients received care according to the AF pathway. The primary study outcome was hospital admission rate. Secondary outcomes included ED LOS and inpatient LOS. We enrolled 104 consecutive patients in each stage. Patients treated using the AF pathway were admitted to the hospital less frequently than patients who received routine care (15% versus 55%; P<0.001). For admitted patients, average hospital LOS was shorter in the AF pathway cohort than in the routine care cohort (64 versus 105 hours, respectively; P=0.01). There was no significant difference in the average ED LOS between AF pathway and routine care cohorts (14 versus 12 hours, respectively; P=0.32). Conclusions In this prospective 2-stage, 2-center study, utilization of a multidisciplinary AF treatment pathway resulted in a 3.7-fold reduction in admission rate and a 1.6-fold reduction in average hospital LOS for admitted patients. Utilization of the AF pathway was not associated with a significant change in ED LOS.

Comparison of Effectiveness of Alcohol Septal Ablation Versus Ventricular Septal Myectomy on Acute Care Use for Cardiovascular Disease in Patients With Hypertrophic Cardiomyopathy.

Alcohol septal ablation (ASA) and ventricular septal myectomy (VSM) are 2 options of ventricular septal reduction therapy (VSRT) for obstructive hypertrophic cardiomyopathy (HC). We hypothesized that patients with HC who underwent ASA have a higher risk of acute care use (i.e., emergency department [ED] visit or unplanned hospitalization) for cardiovascular disease (CVD) than VSM. We performed a comparative effectiveness study of ASA versus VSM (reference group) among patients with HC who underwent VSRT, using population-based ED and inpatient databases in 3 states, 2005 to 2014. The outcome was acute care use for CVD during a 2-year post-VSRT period. We constructed univariable and multivariable logistic regression models to compare the risk during sequential 6-month periods. We also performed sensitivity analysis with propensity score-matching at 1:1 ratio. We identified 850 patients with HC who underwent VSRT, including 393 with ASA and 457 with VSM. During 13 to 18 months after VSRT, there was a nonsignificantly higher risk with ASA than VSM (adjusted odds ratio [OR] 1.73; 95% confidence interval [CI] 0.83 to 3.60; p = 0.14). Patients who had ASA had a significantly higher risk in the 19 to 24 months post-VSRT period (adjusted OR 2.12; 95% CI 1.06 to 4.23; p = 0.03). Similarly, the propensity score-matched analysis demonstrated a higher risk with ASA than VSM during 13 to 18 months (OR 2.97; 95% CI 1.04 to 8.46; p = 0.04) and 19 to 24 months (OR 7.06; 95% CI 2.04 to 24.36; p = 0.002) after VSRT. In conclusion, among 850 patients with HC who underwent VSRT, the risk of acute care use for CVD was higher after ASA than VSM during the second post-VSRT year.

Emergency department triage prediction of clinical outcomes using machine learning models.

BACKGROUND: Development of emergency department (ED) triage systems that accurately differentiate and prioritize critically ill from stable patients remains challenging. We used machine learning models to predict clinical outcomes, and then compared their performance with that of a conventional approach-the Emergency Severity Index (ESI). METHODS: Using National Hospital and Ambulatory Medical Care Survey (NHAMCS) ED data, from 2007 through 2015, we identified all adult patients (aged ≥ 18 years). In the randomly sampled training set (70%), using routinely available triage data as predictors (e.g., demographics, triage vital signs, chief complaints, comorbidities), we developed four machine learning models: Lasso regression, random forest, gradient boosted decision tree, and deep neural network. As the reference model, we constructed a logistic regression model using the five-level ESI data. The clinical outcomes were critical care (admission to intensive care unit or in-hospital death) and hospitalization (direct hospital admission or transfer). In the test set (the remaining 30%), we measured the predictive performance, including area under the receiver-operating-characteristics curve (AUC) and net benefit (decision curves) for each model. RESULTS: Of 135,470 eligible ED visits, 2.1% had critical care outcome and 16.2% had hospitalization outcome. In the critical care outcome prediction, all four machine learning models outperformed the reference model (e.g., AUC, 0.86 [95%CI 0.85-0.87] in the deep neural network vs 0.74 [95%CI 0.72-0.75] in the reference model), with less under-triaged patients in ESI triage levels 3 to 5 (urgent to non-urgent). Likewise, in the hospitalization outcome prediction, all machine learning models outperformed the reference model (e.g., AUC, 0.82 [95%CI 0.82-0.83] in the deep neural network vs 0.69 [95%CI 0.68-0.69] in the reference model) with less over-triages in ESI triage levels 1 to 3 (immediate to urgent). In the decision curve analysis, all machine learning models consistently achieved a greater net benefit-a larger number of appropriate triages considering a trade-off with over-triages-across the range of clinical thresholds. CONCLUSIONS: Compared to the conventional approach, the machine learning models demonstrated a superior performance to predict critical care and hospitalization outcomes. The application of modern machine learning models may enhance clinicians' triage decision making, thereby achieving better clinical care and optimal resource utilization.

Training to Improve Communication Quality: An Efficient Interdisciplinary Experience for Emergency Department Clinicians.

Patient-provider communication has been recognized as a critical area of focus for improved health care quality, with a mounting body of evidence tying patient satisfaction and provider communication to important health care outcomes. Despite this, few programs have been studied in the emergency department (ED) setting. The authors designed a communication curriculum and conducted trainings for all ED clinical staff. Although only 72% of clinicians believed the course would be a valuable use of their time before taking it, 97% reported that it was a valuable use of their time after ( P < .001). Pre-course self-evaluation of knowledge, skill, and ability were high. Despite this, post-course self-efficacy improved statistically significantly. This study suggests that it is possible, in a brief training session, to deliver communication content that participants felt was relevant to their practice, improved their skills and knowledge, changed their attitude, and was perceived to be a valuable use of their time.

Bariatric surgery is associated with lower risk of acute care use for cardiovascular disease in obese adults.

AIMS: Studies have suggested relationships between obesity and cardiovascular disease (CVD) morbidity. However, little is known about whether substantial weight reduction affects the risk of CVD-related acute care use in obese patients with CVD. The objective of this study was to determine whether bariatric surgery is associated with decreased risk of CVD-related acute care use. METHODS AND RESULTS: We performed a self-controlled case series study of obese adults with CVD who underwent bariatric surgery, using population-based emergency department (ED), and inpatient samples in California, Florida, and Nebraska from 2005 to 2011. The primary outcome was ED visit or unplanned hospitalization for CVD. We used conditional logistic regression to compare the risk during sequential 12-month periods, using pre-surgery months 13-24 as the reference period. We identified 11 106 obese adults with CVD who underwent bariatric surgery. During the reference period, 20.6% [95% confidence interval (CI), 19.8-21.3%] of patients had an ED visit or unplanned hospitalization for CVD. The risk did not significantly change in the subsequent 12-month pre-surgery period [adjusted odds ratio (aOR) 0.98; 95% CI, 0.93-1.04; P = 0.42]. By contrast, in the first 12-month period after bariatric surgery, the risk significantly decreased (aOR 0.91; 95% CI, 0.86-0.96; P = 0.002). The risk remained reduced in the subsequent 13-24 months post-bariatric surgery (aOR 0.84; 95% CI, 0.79-0.89; P < 0.001). There was no reduction in the risk in separate obese populations that underwent non-bariatric surgery (i.e. cholecystectomy, hysterectomy). By CVD category, the risk of acute care use for coronary artery disease (CAD), heart failure (HF), and hypertension decreased after bariatric surgery, whereas that of dysrhythmia and venous thromboembolism transiently increased (Bonferroni corrected P < 0.05 for all comparisons). CONCLUSION: Bariatric surgery is associated with a lower risk of overall CVD-related ED visit or unplanned hospitalization. The decline was mainly driven by reduced risk of acute care use for CAD, HF, and hypertension after bariatric surgery.

Implementation of a Rapid, Protocol-based TIA Management Pathway.

INTRODUCTION: Our goal was to assess whether use of a standardized clinical protocol improves efficiency for patients who present to the emergency department (ED) with symptoms of transient ischemic attack (TIA). METHODS: We performed a structured, retrospective, cohort study at a large, urban, tertiary care academic center. In July 2012 this hospital implemented a standardized protocol for patients with suspected TIA. The protocol selected high-risk patients for admission and low/intermediate-risk patients to an ED observation unit for workup. Recommended workup included brain imaging, vascular imaging, cardiac monitoring, and observation. Patients were included if clinical providers determined the need for workup for TIA. We included consecutive patients presenting during a six-month period prior to protocol implementation, and those presenting between 6-12 months after implementation. Outcomes included ED length of stay (LOS), hospital LOS, use of neuroimaging, and 90-day risk of stroke or TIA. RESULTS: From 01/2012 to 06/2012, 130 patients were evaluated for TIA symptoms in the ED, and from 01/2013 to 06/2013, 150 patients. The final diagnosis was TIA or stroke in 45% before vs. 41% after (p=0.18). Following the intervention, the inpatient admission rate decreased from 62% to 24% (p<0.001), median ED LOS decreased by 1.2 hours (5.7 to 4.9 hours, p=0.027), and median total hospital LOS from 29.4 hours to 23.1 hours (p=0.019). The proportion of patients receiving head computed tomography (CT) went from 68% to 58% (p=0.087); brain magnetic resonance (MR) imaging from 83% to 88%, (p=0.44) neck CT angiography from 32% to 22% (p=0.039); and neck MR angiography from 61% to 72% (p=0.046). Ninety-day stroke or recurrent TIA among those with final diagnosis of TIA was 3% for both periods. CONCLUSION: Implementation of a TIA protocol significantly reduced ED LOS and total hospital LOS.

Expedited Discharge from an Academic Emergency Department: A Pilot Program.

BACKGROUND: As the numbers of emergency department (ED) visits and inpatient admissions continue to increase, there is growing interest in alternatives to inpatient hospitalization. OBJECTIVE: Our aim was to investigate a novel approach to expediting discharges from the ED with multidisciplinary discharge services to prevent an avoidable admission into the hospital. METHODS: This pilot study was conducted at a large urban tertiary-care ED in 2016. All patients presenting to the ED with planned inpatient or observation admission were considered for discharge with enhanced discharge planning services. The patients selected, discharge diagnoses, and outcomes were analyzed by descriptive statistics. This study was approved by the study site's Institutional Review Board, including waiver of patient consent. RESULTS: During the pilot period, 57 out of 143 (40%) selected patients with planned admission were discharged with enhanced discharge planning services. Median ED length of stay was 17.2 h and mean patient age was 73 years old. Of these patients, 7 (12%) returned within 72 h and 4 (0.07%) were subsequently admitted to the hospital. CONCLUSIONS: In this pilot study, a novel approach to expediting discharges from the ED with multidisciplinary discharge services was feasible and resulted in fewer admissions to the hospital.

Association of bariatric surgery with risk of acute care use for hypertension-related disease in obese adults: population-based self-controlled case series study.

BACKGROUND: Hypertension carries a large societal burden. Obesity is known as a risk factor for hypertension. However, little is known as to whether weight loss interventions reduce the risk of hypertension-related adverse events, such as acute care use (emergency department [ED] visit and/or unplanned hospitalization). We used bariatric surgery as an instrument for investigating the effect of large weight reduction on the risk of acute care use for hypertension-related disease in obese adults with hypertension. METHODS: We performed a self-controlled case series study of obese patients with hypertension who underwent bariatric surgery using population-based ED and inpatient databases that recorded every bariatric surgery, ED visit, and hospitalization in three states (California, Florida, and Nebraska) from 2005 to 2011. The primary outcome was acute care use for hypertension-related disease. We used conditional logistic regression to compare each patient's risk of the outcome event during sequential 12-month periods, using pre-surgery months 13-24 as the reference period. RESULTS: We identified 980 obese patients with hypertension who underwent bariatric surgery. The median age was 48 years (interquartile range, 40-56 years), 74% were female, and 55% were non-Hispanic white. During the reference period, 17.8% (95% confidence interval [CI], 15.4-20.2%) had a primary outcome event. The risk remained unchanged in the subsequent 12-month pre-surgery period (18.2% [95% CI, 15.7-20.6%]; adjusted odds ratio [aOR] 1.02 [95% CI, 0.83-1.27]; P = 0.83). In the first 12-month period after bariatric surgery, the risk significantly decreased (10.5% [8.6-12.4%]; aOR 0.58 [95% CI, 0.45-0.74]; P < 0.0001). Similarly, the risk remained significantly reduced in the 13-24 months after bariatric surgery (12.9% [95% CI, 10.8-15.0%]; aOR 0.71 [95% CI, 0.57-0.90]; P = 0.005). By contrast, there was no significant reduction in the risk among obese patients who underwent non-bariatric surgery (i.e., cholecystectomy, hysterectomy, spinal fusion, or mastectomy). CONCLUSIONS: In this population-based study of obese adults with hypertension, we found that the risk of acute care use for hypertension-related disease decreased by 40% after bariatric surgery. The data provide the best evidence on the effectiveness of substantial weight loss on hypertension-related morbidities, underscoring the importance of discussing options for weight reduction when treating obese patients with hypertension.

Effect of Bariatric Surgery on Emergency Department Visits and Hospitalizations for Atrial Fibrillation.

Atrial fibrillation (AF) and obesity are major health problems in the United States. However, little is known about whether bariatric surgery affects AF-related morbidities. This study investigated whether bariatric surgery is associated with short-term and long-term changes in the risk of emergency department (ED) visits or hospitalizations for AF. We performed a self-controlled case series study of obese adults with AF who underwent bariatric surgery by using population-based ED and inpatient databases in California, Florida, and Nebraska from 2005 to 2011. The primary outcome was ED visit or hospitalization for AF. We used conditional logistic regression to compare each patient's risk of the outcome event during sequential 12-month periods, using presurgery months 13 to 24 as a reference period. Our sample consisted of 523 obese adults with AF who underwent bariatric surgery. The median age was 57 years (interquartile range 48 to 64 years), 59% were female, and 84% were non-Hispanic white. During the reference period, 15.9% (95% confidence interval [CI] 12.7% to 19.0%) of patients had an ED visit or hospitalization for AF. The risk remained similar in the subsequent 12-month presurgery period (adjusted OR [aOR] 1.29 [95% CI, 0.94 to 1.76] p = 0.11). In contrast, the risk significantly increased within 12 months after bariatric surgery (aOR 1.53 [95% CI 1.13 to 2.07] p = 0.006). The risk remained elevated during 13-24 months after bariatric surgery (aOR 1.41 [95% CI, 1.03 to 1.91] p = 0.03). In conclusion, this population-based study demonstrated that bariatric surgery was associated with an increased risk of AF episodes requiring an ED visit or hospitalization for at least 2 years after surgery among obese patients with AF.

Clinical implementation of an emergency department coronary computed tomographic angiography protocol for triage of patients with suspected acute coronary syndrome.

OBJECTIVES: To evaluate the efficiency and safety of emergency department (ED) coronary computed tomography angiography (CTA) during a 3-year clinical experience. METHODS: Single-center registry of coronary CTA in consecutive ED patients with suspicion of acute coronary syndrome (ACS). The primary outcome was efficiency of coronary CTA defined as the length of hospitalization. Secondary endpoints of safety were defined as the rate of downstream testing, normalcy rates of invasive coronary angiography (ICA), absence of missed ACS, and major adverse cardiac events (MACE) during follow-up, and index radiation exposure. RESULTS: One thousand twenty two consecutive patients were referred for clinical coronary CTA with suspicion of ACS. Overall, median time to discharge home was 10.5 (5.7-24.1) hours. Patient disposition was 42.7 % direct discharge from the ED, 43.2 % discharge from emergency unit, and 14.1 % hospital admission. ACS rate during index hospitalization was 9.1 %. One hundred ninety two patients underwent additional diagnostic imaging and 77 underwent ICA. The positive predictive value of CTA compared to ICA was 78.9 % (95 %-CI 68.1-87.5 %). Median CT radiation exposure was 4.0 (2.5-5.8) mSv. No ACS was missed; MACE at follow-up after negative CTA was 0.2 %. CONCLUSIONS: Coronary CTA in an experienced tertiary care setting allows for efficient and safe management of patients with suspicion for ACS. KEY POINTS: • ED Coronary CTA using advanced systems is associated with low radiation exposure. • Negative coronary CTA is associated with low rates of MACE. • CTA in ED patients enables short median time to discharge home. • CTA strategy is characterized by few downstream tests including unnecessary ICA.