High sensitivity troponin I as a biomarker for cardiac allograft vasculopathy: Evaluation of diagnostic potential and clinical utility

INTRODUCTION

Cardiac allograft vasculopathy (CAV) limits long-term survival in heart transplant (HTx) recipients. The use of biomarkers in CAV surveillance has been studied, but none are used in clinical practice. The predictive value of high-sensitivity troponin I (hsTnI) has not been extensively investigated in HTx recipients.

METHODS

HTx patients undergoing surveillance coronary angiograms and enrolled in the Emory Cardiovascular Biobank had plasma hsTnI measured. CAV grade was assessed using ISHLT nomenclature. Multivariable cumulative link mixed modeling was performed to determine association between hsTnI level and CAV grade. Patients were followed for adverse outcomes over a median 10-year period. Kaplan-Meier survival analysis and Cox proportional hazard modeling were performed.

RESULTS

Three hundred and seventy-two angiograms were analyzed in 156 patients at a median 8.9 years after transplant. hsTnI levels were positively correlated with concurrent CAV grade after adjustment for age, age at transplant, sex, BMI, hypertension, diabetes, hyperlipidemia, estimated glomerular filtration rate, and history of acute cellular rejection (p = .016). In an adjusted Cox proportional hazard model, initial hsTnI level above the median (4.9 pg/mL) remained a predictor of re-transplantation or death (hazard ratio 1.82; 95% confidence interval 1.16-2.90; p = .01).

CONCLUSION

An elevated hsTnI level reflects severity of CAV and is associated with poor long-term outcomes in patients with HTx.

A machine learning model for predicting congenital heart defects from administrative data

INTRODUCTION

International Classification of Diseases (ICD) codes recorded in administrative data are often used to identify congenital heart defects (CHD). However, these codes may inaccurately identify true positive (TP) CHD individuals. CHD surveillance could be strengthened by accurate CHD identification in administrative records using machine learning (ML) algorithms.

METHODS

To identify features relevant to accurate CHD identification, traditional ML models were applied to a validated dataset of 779 patients; encounter level data, including ICD-9-CM and CPT codes, from 2011 to 2013 at four US sites were utilized. Five-fold cross-validation determined overlapping important features that best predicted TP CHD individuals. Median values and 95% confidence intervals (CIs) of area under the receiver operating curve, positive predictive value (PPV), negative predictive value, sensitivity, specificity, and F1-score were compared across four ML models: Logistic Regression, Gaussian Naive Bayes, Random Forest, and eXtreme Gradient Boosting (XGBoost).

RESULTS

Baseline PPV was 76.5% from expert clinician validation of ICD-9-CM CHD-related codes. Feature selection for ML decreased 7138 features to 10 that best predicted TP CHD cases. During training and testing, XGBoost performed the best in median accuracy (F1-score) and PPV, 0.84 (95% CI: 0.76, 0.91) and 0.94 (95% CI: 0.91, 0.96), respectively. When applied to the entire dataset, XGBoost revealed a median PPV of 0.94 (95% CI: 0.94, 0.95).

CONCLUSIONS

Applying ML algorithms improved the accuracy of identifying TP CHD cases in comparison to ICD codes alone. Use of this technique to identify CHD cases would improve generalizability of results obtained from large datasets to the CHD patient population, enhancing public health surveillance efforts.

Initial attendance and retention in adult healthcare as criteria for transition success among organ transplant recipients

BACKGROUND

Adolescent and young adult (AYA) solid organ transplant recipients experience worsening medical outcomes during transition to adult healthcare. Current understanding and definitions of transition success emphasize first initiation of appointment attendance in adult healthcare; however, declines in attendance over time after transfer remain possible, particularly as AYAs are further removed from their pediatric provider and assume greater independence in their care.

METHODS

The current study assessed health-care utilization, medical outcomes, and transition success among 49 AYA heart, kidney, or liver recipients recently transferred to adult healthcare. Differences in outcomes were examined along two transition success criteria: (1) initial engagement in adult healthcare within 6 or 12 months of last pediatric appointment and (2) retention in adult healthcare over 3 years following last pediatric appointment. Growth curve modeling examined change in attendance over time.

RESULTS

Successful retention in adult healthcare was significantly related to more improved clinical outcomes, including decreased number and duration of hospitalizations and greater medication adherence, as compared to initial engagement. Significant declines in appointment attendance over 3 years were noted, and individual differences in declines were not accounted for by age at transfer or time since transplant.

CONCLUSIONS

Findings underscore support for AYAs after transfer, as significant declines in attendance were noted after initiating adult care. Clinical care teams should examine transition success longitudinally to address changes in health-care utilization and medical outcomes. Attention to interventions and administrative support aimed at maintaining or increasing attendance and identifying risk factors and intervention for unsuccessful transition is warranted.

Motivations, Barriers, and Outcomes of Patient-Reported Shared Decision Making in Eosinophilic Esophagitis

BACKGROUND

Little is known about patient choice in treatment of eosinophilic esophagitis (EoE).

AIM

Determine motivators and barriers to using common EoE therapies and describe patient-reported shared decision making (SDM) and satisfaction with treatment.

METHODS

We developed and administered a Web-based survey on factors influencing EoE treatment choice, SDM, and satisfaction. Adults with EoE and adult caregivers of pediatric EoE patients were recruited via patient advocacy groups and at two centers. Descriptive statistics of multiple response questions and multivariable logistic regression were performed to identify predictors of SDM and satisfaction with treatment.

RESULTS

A total of 243 adults (mean age 38.7 years) and 270 adult caregivers of children (mean age 9.5 years) completed the survey. Preventing worsening disease was the most common motivator to treat EoE. Barriers to topical steroids were potential side effects, cost, and preferring a medication-free approach. Inconvenience and quality of life were barriers to diet. Potential adverse events, discomfort, and cost were barriers to dilation. Nearly half (42%) of patients experienced low SDM, but those followed by gastroenterologists were more likely to experience greater SDM compared to non-specialists (OR 1.81; 95% CI 1.03-3.15). Patients receiving more SDM were more satisfied with treatment, regardless of provider or treatment type (OR 2.62, 95% CI 1.76-3.92).

CONCLUSIONS

Patients with EoE pursue treatment mostly to prevent worsening disease. Common barriers to treatment are inconvenience and financial costs. SDM is practiced most by gastroenterologists, but nearly half of patients do not experience SDM, indicating a substantial area of need in EoE.

Health Care Transition Perceptions Among Parents of Adolescents with Congenital Heart Defects in Georgia and New York

With increasing survival trends for children and adolescents with congenital heart defects (CHD), there is a growing need to focus on transition from pediatric to adult specialty cardiac care. To better understand parental perspectives on the transition process, a survey was distributed to 451 parents of adolescents with CHD who had recent contact with the healthcare system in Georgia (GA) and New York (NY). Among respondents, 90.7% reported excellent, very good or good health-related quality of life (HRQoL) for their adolescent. While the majority of parents (77.8%) had been told by a provider about their adolescent's need to transition to adult specialty cardiac care, most reported concerns about transitioning to adult care. Parents were most commonly concerned with replacing the strong relationship with pediatric providers (60.7%), locating an appropriate adult provider (48.7%), and accessing adult health insurance coverage (43.6%). These findings may offer insights into transition planning for adolescents with CHD.

Omission of Heart Transplant Recipients From the Appropriate Use Criteria for Revascularization and the Ramifications on Heart Transplant Centers

Importance

Guidelines endorse routine coronary angiography and percutaneous coronary intervention (PCI) to screen for and treat cardiac allograft vasculopathy in heart transplant recipients. However, the current Appropriate Use Criteria for Revascularization (AUC-R) do not recognize prior heart transplant as a unique PCI indication. Whether this affects rates of rarely appropriate (RA) PCIs is unknown.

Objective

To assess the rate of RA PCI procedures in heart transplant recipients and how it pertains to hospital PCI appropriateness metrics and pay-for-performance scorecards.

Design, Setting, and Participants

This observational study used National Cardiovascular Data Registry CathPCI Registry data on all patients undergoing elective PCIs from 96 Medicare-approved heart transplant centers from quarter 3 of 2009 to quarter 2 of 2017. The data were analyzed in July 2018.

Exposures

Prior heart transplant.

Main Outcomes and Measures

Rates of RA elective PCIs in heart transplant recipients compared with nonrecipients and hospital rates of RA PCI before vs after exclusion of heart transplant recipients using paired t tests. In a subset of heart transplant centers participating in the Anthem Blue Cross and Blue Shield's Quality-In-Sights Hospital Incentive Program (Q-HIP), we compared the change in Q-HIP scorecards before vs after excluding heart transplant recipients.

Results

Of 168 802 participants, 123 124 (72.9%) were men, 137 457 were white, and the mean (SD) age was 66.3 (11.4) years. Of 168 802 elective PCIs performed in heart transplant centers, 1854 (1.1%) were for heart transplant recipients. Heart transplant recipients were less likely to have ischemic symptoms (14.6% vs 61.4%, P < .001), had lower rates of antecedent stress testing (15.0% vs 58.4%, P < .001), and had higher RA PCI rates (66.0% vs 16.9%, P < .001) compared with nonrecipients. In heart transplant centers, the absolute difference in RA rates (before vs after excluding transplant recipients) was directly associated with the proportion of PCIs performed in heart transplant recipients (r = 0.91; P < .001). In the subset of heart transplant centers participating in Q-HIP during the 2016 and 2017 calendar years, 8 of 20 (40%) and 8 of 16 centers (50%), respectively, could have benefited from a change in their Q-HIP scorecards if their RA PCI rates excluded transplant recipients.

Conclusions and Relevance

Two-thirds of PCIs in heart transplant recipients were deemed RA by the AUC-R. The failure of the AUC-R to consider prior heart transplant as a unique PCI indication may lead to inflated RA PCI rates with the potential for affecting quality reporting and pay-for-performance metrics in heart transplant centers.

Biomarker profile in stable Fontan patients

BACKGROUND

As the population of adults with congenital heart disease (CHD) grows, cardiologists continue to encounter patients with complex anatomies that challenge the standard treatment of care. Single ventricle Fontan palliated patients are the most complex within CHD, with a high morbidity and mortality burden. Factors driving this early demise are largely unknown.

METHODS AND RESULTS

We analyzed biomarker expression in 44 stable Fontan outpatients (29.2 ± 10.7 years, 68.2% female) seen in the outpatient Emory Adult Congenital Heart Center and compared them to 32 age, gender and race matched controls. In comparison to controls, Fontan patients had elevated levels of multiple cytokines within the inflammatory pathway including Tumor Necrosis Factor-α (TNF-α) (p < 0.001), Interleukin-6 (IL-6) (p < 0.011), Growth Derived Factor-15 (GDF-15) (p < 0.0001), β2-macroglobulin, (p = 0.0006), stem cell mobilization: Stromal Derived Factor-1∝ (SDF-1α) (p = 0.006), extracellular matrix turnover: Collagen IV (p < 0.0001), neurohormonal activation: Renin (p < 0.0001), renal dysfunction: Cystatin C (p < 0.0001) and Urokinase Receptor (uPAR) (p = 0.022), cardiac injury: Troponin-I (p < 0.0004) and metabolism: Adiponectin (p = 0.0037). Within 1 year of enrollment 50% of Fontan patients had hospitalizations, arrhythmias or worsening hepatic function. GDF-15 was significantly increased in Fontan patients with clinical events (p < 0.0001). In addition, GDF-15 moderately correlated with longer duration of Fontan (r = 0.55, p = 0.01) and was elevated in atriopulmonary (AP) Fontan circulation. Finally, in a multivariate model, VEGF-D and Collagen IV levels were found to be associated with a change in MELDXI, a marker of liver dysfunction.

CONCLUSION

Multiple clinical and molecular biomarkers are upregulated in Fontan patients, suggesting a state of chronic systemic dysregulation.

Surveillance of Congenital Heart Defects among Adolescents at Three U.S. Sites

The prevalence, co-morbidities, and healthcare utilization in adolescents with congenital heart defects (CHDs) is not well understood. Adolescents (11 to 19 years old) with a healthcare encounter between January 1, 2008 (January 1, 2009 for MA) and December 31, 2010 with a CHD diagnosis code were identified from multiple administrative data sources compiled at 3 US sites: Emory University, Atlanta, Georgia (EU); Massachusetts Department of Public Health (MA); and New York State Department of Health (NY). The estimated prevalence for any CHD was 4.77 (EU), 17.29 (MA), and 4.22 (NY) and for severe CHDs was 1.34 (EU), 3.04 (MA), and 0.88 (NY) per 1,000 adolescents. Private or commercial insurance was the most common insurance type for EU and NY, and Medicaid for MA. Inpatient encounters were more frequent in severe CHDs. Cardiac co-morbidities included rhythm and conduction disorders at 20% (EU), 46% (MA), and 9% (NY) as well as heart failure at 3% (EU), 15% (MA), and 2% (NY). Leading noncardiac co-morbidities were respiratory/pulmonary (22% EU, 34% MA, 16% NY), infectious disease (17% EU, 22% MA, 20% NY), non-CHD birth defects (12% EU, 23% MA, 14% NY), gastrointestinal (10% EU, 28% MA, 13% NY), musculoskeletal (10% EU, 32% MA, 11% NY), and mental health (9% EU, 30% MA, 11% NY). In conclusion, this study used a novel approach of uniform CHD definition and variable selection across administrative data sources in 3 sites for the first population-based CHD surveillance of adolescents in the United States. High resource utilization and co-morbidities illustrate ongoing significant burden of disease in this vulnerable population.

Lost in the system? Transfer to adult congenital heart disease care-Challenges and solutions

OBJECTIVE

Transfer of congenital heart disease care from the pediatric to adult setting has been identified as a priority and is associated with better outcomes. Our objective is to determine what percentage of patients with congenital heart disease transferred to adult congenital cardiac care.

DESIGN

A retrospective cohort study.

SETTING

Referrals to a tertiary referral center for adult congenital heart disease patients from its pediatric referral base.

PATIENTS

This resulted in 1514 patients age 16-30, seen at least once in three pediatric Georgia health care systems during 2008-2010.

INTERVENTIONS

We analyzed for protective factors associated with age-appropriate care, including distance from referral center, age, timing of transfer, gender, severity of adult congenital heart disease, and comorbidities.

OUTCOME MEASURES

We analyzed initial care by age among patients under pediatric care from 2008 to 2010 and if patients under pediatric care subsequently transferred to an adult congenital cardiologist in this separate pediatric and adult health system during 2008-2015.

RESULTS

Among 1514 initial patients (39% severe complexity), 24% were beyond the recommended transfer age of 21 years. Overall, only 12.1% transferred care to the referral affiliated adult hospital. 90% of these adults that successfully transferred were seen by an adult congenital cardiologist, with an average of 33.9 months between last pediatric visit and first adult visit. Distance to referral center contributed to delayed transfer to adult care. Those with severe congenital heart disease were more likely to transfer (18.7% vs 6.2% for not severe).

CONCLUSION

Patients with severe disease are more likely to transfer to adult congenital heart disease care than nonsevere disease. Most congenital heart disease patients do not transfer to adult congenital cardiology care with distance to referral center being a contributing factor. Both pediatric and adult care providers need to understand and address barriers in order to improve successful transfer.

Abstract 196: Omission of Heart Transplant Recipients from the Appropriate Use Criteria for Revascularization and Impact on High-Volume Heart Transplant Centers

Background: For heart transplant recipients, guidelines endorse routine coronary angiography and percutaneous coronary intervention (PCI) to screen for and treat cardiac allograft vasculopathy (CAV). However, current Appropriate Use Criteria for Revascularization (AUC-R) do not recognize CAV as a unique PCI indication, and thus PCI for CAV is often labeled “rarely appropriate (RA).” The AUC-R’s omission of CAV patients, and its impact on RA PCI rates and hospital pay-for-performance reimbursement have never been described.

Methods: Using NCDR CathPCI Registry data, we identified all elective PCIs from 96 Medicare-approved heart transplant centers between 2009Q3 and 2017Q2. NCDR-reported rates of RA elective PCI were compared before and after exclusion of CAV patients using paired t-tests. The annual pay-for-performance financial incentives potentially lost by heart transplant centers were estimated based on AUC-R performance thresholds published by Anthem Blue Cross and Blue Shield’s Quality-In-Sights®: Hospital Incentive Program (Q-HIP®).

Results: Of 168,802 elective PCIs performed in heart transplant centers, 1,854 (1.1%) were for CAV. CAV patients, compared with non-heart transplant recipients, were more frequently asymptomatic (81.9% vs. 33.4%, p<0.001) and had lower rates of prior stress testing (15.0% vs. 58.4%, p<0.001), resulting in higher RA PCI rates (66.0% vs 16.9%, p<0.001). In transplant centers, the absolute difference in RA rates (before vs. after exclusion of CAV patients) was directly associated with the proportion of total PCIs performed in CAV patients (p<0.001, Figure ). In a sample of 16 heart transplant centers participating in Q-HIP® during the 2017 calendar year measurement period, 2 (13%) centers could have each observed reimbursement increases estimated at ~$90,000 dollars if their Q-HIP® scorecards were re-scored after excluding CAV patients.

Conclusion: Two-thirds of PCI cases in CAV patients are deemed RA by the AUC-R. The failure of the AUC-R to recognize CAV as a unique PCI indication may lead to inflated RA PCI rates and has the potential for substantial negative pay-for-performance implications in heart transplant centers. The AUC-R should recognize CAV as a unique PCI indication so that heart transplant centers are not penalized for performing PCI for CAV.

Estimates of adolescent and adult congenital heart defect prevalence in metropolitan Atlanta, 2010, using capture-recapture applied to administrative records

PURPOSE

Although congenital heart defects (CHD) are one of the most common types of birth defects in the United States, subnational prevalence estimates beyond early childhood are limited.

METHODS

We used capture-recapture methodology and logistic regression to estimate CHD prevalence per 1000 residents as of January 1, 2010, separately for adolescents and adults treated and living within five metropolitan Atlanta, Georgia counties, during 2008-2010.

RESULTS

Data sources differed by age. Adolescents (n = 1621, aged 11-20 years) and adults (n = 3176, aged 21-64 years) were captured from at least one source. We estimated CHD prevalence to be 7.85 per 1000 adolescents (estimated n = 3718 [95% CI: 3471-4004]) and 6.08 per 1000 adults (estimated n = 12,969 [95% CI: 13,873-18,915]). When we included persons found in age-inappropriate sources, prevalence estimates increased to 11 per 1000 adolescents and 6.5 per 1000 adults.

CONCLUSIONS

This method for obtaining subnational prevalence estimates provided reasonable prevalence results and identified needs for service improvement. Only one half of adolescents and one-quarter of adults with CHD were in health care within a 3-year time frame, suggesting need for better access to health insurance, transition care, and an increased number of physicians specializing in CHD care.

Detecting moderate or complex congenital heart defects in adults from an electronic health records system

Background

The prevalence of moderate or complex (moderate-complex) congenital heart defects (CHDs) among adults is increasing due to improved survival, but many patients experience lapses in specialty care or their CHDs are undocumented in the medical system. There is, to date, no efficient approach to identify this population.

Objective

To develop and assess the performance of a risk score to identify adults aged 20-60 years with undocumented specific moderate-complex CHDs from electronic health records (EHR).

Methods

We used a case-control study (596 adults with specific moderate-complex CHDs and 2384 controls). We extracted age, race/ethnicity, electrocardiogram (EKG), and blood tests from routine outpatient visits (1/2009 through 12/2012). We used multivariable logistic regression models and a split-sample (4: 1 ratio) approach to develop and internally validate the risk score, respectively. We generated receiver operating characteristic (ROC) c-statistics and Brier scores to assess the ability of models to predict the presence of specific moderate-complex CHDs.

Results

Out of six models, the non-blood biomarker model that included age, sex, and EKG parameters offered a high ROC c-statistic of 0.96 [95% confidence interval: 0.95, 0.97] and low Brier score (0.05) relative to the other models. The adult moderate-complex congenital heart defect risk score demonstrated good accuracy with 96.4% sensitivity and 80.0% specificity at a threshold score of 10.

Conclusions

A simple risk score based on age, sex, and EKG parameters offers early proof of concept and may help accurately identify adults with specific moderate-complex CHDs from routine EHR systems who may benefit from specialty care.

Population-based surveillance of congenital heart defects among adolescents and adults: surveillance methodology

BACKGROUND

Improved treatment of congenital heart defects (CHDs) has increased survival of persons with CHDs; however, no U.S. population-based systems exist to assess prevalence, healthcare utilization, or longer-term outcomes among adolescents and adults with CHDs.

METHODS

Novel approaches identified individuals aged 11-64 years who received healthcare with ICD-9-CM codes for CHDs at three sites: Emory University in Atlanta, Georgia (EU), Massachusetts Department of Public Health (MA), New York State Department of Health (NY) between January 1, 2008 (2009 for MA) and December 31, 2010. Case-finding sources included outpatient clinics; Medicaid and other claims data; and hospital inpatient, outpatient, and emergency visit data. Supplemental information came from state vital records (EU, MA), and birth defects registries (EU, NY). Demographics and diagnostic and procedural codes were linked, de-duplicated, and shared in a de-identified dataset. Cases were categorized into one of five mutually exclusive CHD severity groups; non-cardiac comorbidity codes were grouped into broad categories.

RESULTS

73,112 individuals with CHD codes in healthcare encounters were identified. Primary data source type varied: clinics (EU, NY for adolescents), claims (MA), hospital (NY for adults). There was a high rate of missing data for some variables and data varied in format and quality. Some diagnostic codes had poor specificity for CHD ascertainment.

CONCLUSIONS

To our knowledge, this is the first population-based, multi-site CHD surveillance among adolescents and adults in the U.S. Identification of people living with CHDs through healthcare encounters using multiple data sources was feasible, though data quality varied and linkage/de-duplication was labor-intensive.

Individuals affected by eosinophilic gastrointestinal disorders have complex unmet needs and frequently experience unique barriers to care

INTRODUCTION

Eosinophilic gastrointestinal disorders (EGIDs) are a rare but emerging healthcare problem. Patient advocacy groups (PAGs) have an important role in representing the EGID community, and serve as valuable research partners. By leveraging the partnership between medical researchers and PAGs, we examined the unmet needs and barriers to care perceived by individuals affected by EGIDs. Next, we examined if these varied between adult EGID patients and adult caregivers of children with EGID.

METHODS

Adult EGID patients and adult caregivers of children (<18 years) with EGIDs participated in this study. PAGs conducted focus groups comprised of individuals affected by EGIDs to identify domains and questions meaningful to the EGID community and this information was used to develop an online REDCap survey. The survey consisted of 58 questions across medical, healthcare, social, and emotional impact domains. It was distributed via the PAGs' web-based platforms. Demographic data, and responses to questions on a six-point Likert scale were collected and analyzed.

RESULTS

Of the 361 responses analyzed, 90 (25%) were from adult EGID patients and 271 (75%) were from adult caregivers. Of the applicable responses, in the medical domain only 19% of participants indicated that repeated endoscopies to monitor response to treatment was convenient. In the healthcare domain, 67% indicated that lack of insurance coverage for elemental formula was a barrier. In the social domain, only 5% of respondents reported adequate awareness of EGIDs in schools. In the emotional domain, 64% had experienced significant stress due to EGID related out-of-pocket costs. Multivariate logistic regression revealed that some of these responses varied between adult EGID patients and adult caregivers of children with EGID. The respondents indicated highest priority for improvement in the medical domain compared to other domains.

CONCLUSIONS

Individuals affected by EGIDs have a constellation of complex unmet needs and perceived barriers across medical, healthcare, social and emotional domains. Addressing unmet needs in the medical domain is relatively more important for the EGID community. Understanding unmet needs and barriers will likely help design improved patient-centered EGID care paradigms.

New developments in patients with eosinophilic gastrointestinal diseases presented at the CEGIR/TIGERS Symposium at the 2018 American Academy of Allergy, Asthma & Immunology Meeting

The Consortium of Eosinophilic Gastrointestinal Diseases and the International Gastrointestinal Eosinophil Researchers organized a day-long symposium at the recent 2018 Annual Meeting of the American Academy of Allergy, Asthma & Immunology, which was coupled for the first time with the World Allergy Organization meeting to create an international platform. The symposium featured experts in many facets of eosinophilic gastrointestinal diseases, including allergy, immunology, gastroenterology, pathology, and nutrition, and was a well-attended event. The basic science, genetics, cellular immunology, and clinical features of the diseases, with a focus on epithelial, eosinophil, and mast cell responses, as well as current and emerging treatment options, were reviewed. Here we briefly review some of the highlights of the material presented at the meeting.

The 745.5 issue in code-based, adult congenital heart disease population studies: Relevance to current and future ICD-9-CM and ICD-10-CM studies

OBJECTIVE

Although the ICD-9-CM code 745.5 is widely used to indicate the presence of a secundum atrial septal defect (ASD), it is also used for patent foramen ovale (PFO) which is a normal variant and for "rule-out" congenital heart disease (CHD). The ICD-10-CM code Q21.1 perpetuates this issue. The objective of this study was to assess whether code 745.5 in isolation or in combination with unspecified CHD codes 746.9 or 746.89 miscodes for CHD, and if true CHD positives decrease with age.

DESIGN

Echocardiograms of patients with an ICD-9-CM code of 745.5 in isolation or in combination with unspecified CHD codes 746.9 or 746.89 were reviewed to validate the true incidence of an ASD. This observational, cross-sectional record review included patients between 11 and 64 years of age.

RESULTS

Medical charts and echocardiograms of 190 patients (47.9% males) were reviewed. The number of falsely coded patients with 745.5 (no ASD) was high (76.3%). Forty-five (23.7%) patients had a true ASD. Among the 145 patients without an ASD, 100 (52.6%) were classified as having a PFO, 37 (19.5%) had a normal non-CHD echocardiogram, and 8 (4.2%) had some other CHD anomaly. The likelihood that 745.5 coded for a true ASD was higher in children aged 11-20 (64.3%) than adults aged 21-64 years (20.6%).

CONCLUSIONS

This validation study demonstrates that 745.5 performed poorly across all ages. As 745.5 is widely used in population-level investigations and ICD-10-CM perpetuates the problem, future analyses utilizing CHD codes should consider separate analysis of those identified only through code 745.5.

The Evolution of an Adult Congenital Heart Surgery Program: The Emory System

The Emory Adult Congenital Heart (Emory University, Atlanta, GA) program was founded in 2001. In 2004, the surgical component transitioned from a pediatric facility to an adult facility. The aim of this article is characterize the program as a whole, outline changes in the program, and discuss the challenges of the transition process. Between 2001 and 2015, changes in program structure and personnel were evaluated. There has been significant growth of the program between 2001 and 2015. There are currently 19 half-day clinics per week, with 2,700 clinic visits per year. There are six cardiologists, three congenital cardiac surgeons, two sonographers, one advanced practice provider, and one social worker dedicated to the program. There are Accreditation Council for Graduate Medical Education-accredited adult congenital cardiology and congenital cardiac surgery fellowships. One thousand forty-four operations were performed between 2001 and 2015. There were 828 open-heart operations, of which 581 (70%) were re-operations. Over the study period, the number of yearly operations increased from 30 to 119, and the mean age at surgery increased from 22 to 35 years. Over time, more of the operations were performed at the adult hospital: increasing from 3% in 2001 to 82% in 2015, and more of the operations were performed by congenital cardiac surgeons: 87% (114 of 131) before the 2004 transition to 97% (881 of 913) afterward. The Emory Adult Congenital Heart program has undergone significant growth and change, including transition of the surgical component from the pediatric to the adult facility. While numerous obstacles have been overcome and great progress has been made, additional challenges remain.

Antecedents of self-care in adults with congenital heart defects

BACKGROUND

Adults with congenital heart defects (ACHD) face long-term complications related to prior surgery, abnormal anatomy, and acquired cardiovascular conditions. Although self-care is an important part of chronic illness management, few studies have explored self-care in the ACHD population. The purpose of this study is to describe self-care and its antecedents in the ACHD population.

METHODS

Persons with moderate or severe ACHD (N=132) were recruited from a single ACHD center. Self-care (health maintenance behaviors, monitoring and management of symptoms), and potential antecedents including sociodemographic and clinical characteristics, ACHD knowledge, behavioral characteristics (depressive symptoms and self-efficacy), and family-related factors (parental overprotection and perceived family support) were collected via self-report and chart review. Multiple regression was used to identify antecedents of self-care maintenance, monitoring, and management.

RESULTS

Only 44.7%, 27.3%, and 23.3% of participants performed adequate levels of self-care maintenance, monitoring and management, respectively. In multiple regression analysis, self-efficacy, education, gender, perceived family support, and comorbidities explained 25% of the variance in self-care maintenance (R(2)=.248, F(5, 123)=9.44, p<.001). Age, depressive symptoms, self-efficacy, and NYHA Class explained 23% of the variance in self-care monitoring (R(2)=.232, F(2, 124)=10.66, p<.001). Self-efficacy and NYHA Class explained 9% of the variance in self-care management (R(2)=.094, F(2, 80)=5.27, p=.007).

CONCLUSIONS

Low levels of self-care are common among persons with ACHD. Multiple factors, including modifiable factors of self-efficacy, depressive symptoms, and perceived family support, are associated with self-care and should be considered in designing future interventions to improve outcomes in the ACHD population.

Liver disease related to the heart

In this article, we review both acute and chronic liver diseases that occur as a result of heart or circulatory system failure. Ischemic hepatitis, congestive hepatopathy, cardiac cirrhosis, and Fontan liver disease are reviewed. We review clinical presentation, diagnostic data, prognosis, and available therapeutic strategies for these entities. We aim to increase awareness about cardio-hepatic disease as the prevalence of this disorder in adults is increasing. Due to advances in medical and surgical care, patients with heart disease are living longer and thus exposing long-term effects on the liver that are clinically relevant. There may be a role for dual organ transplantation in some cases, but this is a very challenging endeavor, and newer ideas about treatment or prevention are needed.

Surgery in adults with congenital heart disease: risk factors for morbidity and mortality

BACKGROUND

Patients with congenital heart disease are frequently surviving into adulthood, and many of them will require surgery. Unfortunately, outcome data in this patient population are limited. We aimed to identify risk factors associated with adverse events in adults with congenital heart disease undergoing cardiac surgery and establish long-term survival data.

METHODS

We retrospectively studied 458 adult patients who underwent cardiac surgery for congenital heart disease between 2000 and 2010. We constructed logistic models to assess risk factors for mortality, major adverse event (stroke, renal failure, prolonged ventilation, prolonged coma, deep sternal infection, reoperation, and operative mortality), and prolonged length of stay (>7 days). Long-term, all-cause mortality was also measured.

RESULTS

Sixteen patients died (3.49%). Risk factors for mortality included a history of cerebrovascular disease (odds ratio [OR]: 4.51), New York Heart Association (NYHA) class 3 or 4 (OR: 8.88), and surgery on the aorta or the aortic valve (OR: 5.74). Ninety-four patients suffered a major adverse event (20.5%). Significant risk factors were male gender (OR: 2.28), NYHA class of 3 or 4 (OR 2.58), 2 concomitant major operations (OR: 2.15), and cardiopulmonary bypass time of greater than 100 minutes (OR: 3.18). Last, 90 patients (19.7%) remained in the hospital longer than 7 days. Significant risk factors for a prolonged length of stay included chronic lung disease (OR: 3.05), NYHA class of 3 or 4 (OR: 3.69), surgery by an adult cardiac surgeon (OR 2.58), 2 concomitant major operations (OR: 3.28), and cardiopulmonary bypass time of greater than 100 minutes (OR: 2.41). Survival at 1, 5, and 10 years was 97.6%, 95.2%, and 93.4%, respectively.

CONCLUSIONS

Surgery in adults with congenital heart disease can be performed with low morbidity and mortality. Nonetheless, there remain important risk factors for adverse events. Awareness and modification of risk factors may help improve outcomes.