Tara Karamlou

National Practice Patterns for Management of Adult Congenital Heart Disease Operation By Pediatric Heart Surgeons Decreases In-Hospital Death

Background— Surgery for grown-up (age ≥18 years) patients with congenital heart disease (GUCH) is frequently performed by surgeons without specialization in pediatric heart surgery. We sought to define national practice patterns and to determine whether outcomes for GUCH patients are improved if they are treated by specialized pediatric heart surgeons (PHSs) compared with non-PHSs. Methods and Results— We identified index cardiac procedures in patients with 12 congenital heart disease diagnostic groups using the Nationwide Inpatient Sample 1988 to 2003. PHSs were defined as surgeons whose annual practice volumes were made of >75% annual pediatric heart cases. GUCH operations were defined as operations within these 12 diagnoses occurring in patients ≥18 years of age. We identified 30 250 operations, yielding a national estimate of 152 277±7875 operations. Of these, 111 816±7456 (73%) were pediatric operations, and 40 461±1365 (27%) were GUCH operations. PHSs performed 68% of pediatric operations in all diagnostic groups, whereas non-PHSs performed 95% of GUCH operations within the same diagnostic groups (P<0.0001). In-hospital death rates for GUCH patients operated on by PHSs were lower than death rates for GUCH patients operated on by non-PHSs (1.87% [95% CI, 0.62 to 3.13] versus 4.84% [95% CI, 4.30 to 5.38%]; P<0.0001). Survival advantage increased with increasing surgeon annual pediatric volume (P=0.0031). Conclusions— Pediatric patients within specific diagnostic groups are more likely to undergo operation by PHSs, whereas GUCH patients within the same diagnostic groups are more likely to undergo operation by non-PHSs. In-hospital death rates are lower for GUCH patients operated on by PHSs. GUCH patients should be encouraged to obtain surgical operation by PHS.

Congenital Heart Disease in the Older Adult A Scientific Statement From the American Heart Association

The population of adults with congenital heart disease (ACHD) has increased dramatically over the past few decades, with many people who are now middle-aged and some in the geriatric age range. This improved longevity is leading to increased use of the medical system for both routine and episodic care, and caregivers need to be prepared to diagnose, follow up, and treat the older adult with congenital heart disease (CHD). The predictable natural progression of CHD entities and sequelae of previous interventions must now be treated in the setting of late complications, acquired cardiac disease, multiorgan effects of lifelong processes, and the unrelenting process of aging. Despite the advances in this field, death rates in the population from 20 to >70 years of age may be twice to 7 times higher for the ACHD population than for their peers.1 This American Heart Association (AHA) scientific statement will focus on the older adult (>40 years old) with CHD. It is meant to be complementary to the 2008 American College of Cardiology (ACC)/AHA guidelines for ACHD and orient the reader to the natural history, ramifications of childhood repair, and late initial diagnosis of CHD in the older adult. This population with CHD is unique and distinct from both the pediatric and young adult populations with CHD. Much of the information we provide is from scientific research combined with clinical experience from longitudinal care. We emphasize that this is the beginning of a discussion regarding this rapidly growing population, and continued research aimed at the progression of disease and complications reviewed here is necessary to advance the field of ACHD with the scientific rigor it deserves. ACHD encompass a broad range of presentations. There are people who are diagnosed for the first time in adulthood, as well as those with prior palliative repair …

The Relationship Between Hospital Surgical Case Volumes and Mortality Rates in Pediatric Cardiac Surgery: A National Sample, 1988–2005

BACKGROUND Overall surgical volumes and raw mortality rates are frequently used to compare pediatric cardiac surgical programs, but unadjusted comparisons are potentially unreliable. We sought to quantify the relationship between hospital volume and pediatric cardiac surgical mortality. METHODS Pediatric cardiac operations assigned to Risk Adjustment for Congenital Heart Surgery, version 1 (RACHS-1) categories were retrospectively identified by International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) coding from the Nationwide Inpatient Sample, 1988-2005. Hospitals were grouped by yearly pediatric cardiac surgical volume (very small, <or= 20; small, 21 to 100; medium, 101 to 200; large, > 200). Mortality rates were adjusted for surgical volume, case mix (RACHS-1 categories), patient age, and year of operation by logistic regression. RESULTS We identified 55,164 operations from 307 hospitals; 188 (61%) performed 20 or fewer cases per year. The unadjusted mortality rate at very small hospitals was no different than at large hospitals (odds ratio, 1.0, 95% confidence interval [CI] 0.7 to 1.4). After adjustment for RACHS-1 category and age, large hospitals performed significantly better than all other volume groups. As a discriminator of mortality, volume performed significantly worse than a model with RACHS-1 category and age (receiver operating characteristic [ROC] curve area, 0.60 vs 0.81). CONCLUSIONS As a discriminator of mortality, volume alone was only marginally better than a coin flip (ROC curve area of 0.50). However, large-volume hospitals performed more complex operations and achieved superior results; therefore, the use of overall, unadjusted mortality rates to evaluate institution quality is misleading. Hospital comparisons and pay-for-performance initiatives must be based on robust risk-adjusted comparisons.

Surgery insight: late complications following repair of tetralogy of Fallot and related surgical strategies for management.

Biventricular correction of tetralogy of Fallot was devised more than 50 years ago. Current short-term outcomes are excellent. The potential for late complications is, however, an important concern for the growing number of postrepair survivors. Progressive pulmonary valve regurgitation leading to right heart failure and arrhythmia are centrally important problems faced by these patients. New techniques are, however, likely to change the future outcomes for postrepair survivors. These techniques include percutaneous valve replacement, arrhythmia ablation surgery, and strategies that emphasize preservation of the pulmonary valve even at the cost of leaving some residual valvular stenosis. The objectives of this Review are to outline the major complications that arise late after repair of tetralogy of Fallot, to describe the surgical approaches that have been developed to avoid and manage arising complications, and to briefly explore how novel treatment paradigms could change the future long-term outlook for patients following tetralogy repair.

The Society of Thoracic Surgeons Congenital Heart Surgery Database Mortality Risk Model: Part 1-Statistical Methodology.

BACKGROUND This studys objective was to develop a risk model incorporating procedure type and patient factors to be used for case-mix adjustment in the analysis of hospital-specific operative mortality rates after congenital cardiac operations. METHODS Included were patients of all ages undergoing cardiac operations, with or without cardiopulmonary bypass, at centers participating in The Society of Thoracic Surgeons Congenital Heart Surgery Database during January 1, 2010, to December 31, 2013. Excluded were isolated patent ductus arteriosus closures in patients weighing less than or equal to 2.5 kg, centers with more than 10% missing data, and patients with missing data for key variables. Data from the first 3.5 years were used for model development, and data from the last 0.5 year were used for assessing model discrimination and calibration. Potential risk factors were proposed based on expert consensus and selected after empirically comparing a variety of modeling options. RESULTS The study cohort included 52,224 patients from 86 centers with 1,931 deaths (3.7%). Covariates included in the model were primary procedure, age, weight, and 11 additional patient factors reflecting acuity status and comorbidities. The C statistic in the validation sample was 0.858. Plots of observed-vs-expected mortality rates revealed good calibration overall and within subgroups, except for a slight overestimation of risk in the highest decile of predicted risk. Removing patient preoperative factors from the model reduced the C statistic to 0.831 and affected the performance classification for 12 of 86 hospitals. CONCLUSIONS The risk model is well suited to adjust for case mix in the analysis and reporting of hospital-specific mortality for congenital heart operations. Inclusion of patient factors added useful discriminatory power and reduced bias in the calculation of hospital-specific mortality metrics.

The Society of Thoracic Surgeons Congenital Heart Surgery Database Mortality Risk Model: Part 2—Clinical Application

BACKGROUND The empirically derived 2014 Society of Thoracic Surgeons Congenital Heart Surgery Database Mortality Risk Model incorporates adjustment for procedure type and patient-specific factors. The purpose of this report is to describe this model and its application in the assessment of variation in outcomes across centers. METHODS All index cardiac operations in The Society of Thoracic Surgeons Congenital Heart Surgery Database (January 1, 2010, to December 31, 2013) were eligible for inclusion. Isolated patent ductus arteriosus closures in patients weighing less than or equal to 2.5 kg were excluded, as were centers with more than 10% missing data and patients with missing data for key variables. The model includes the following covariates: primary procedure, age, any prior cardiovascular operation, any noncardiac abnormality, any chromosomal abnormality or syndrome, important preoperative factors (mechanical circulatory support, shock persisting at time of operation, mechanical ventilation, renal failure requiring dialysis or renal dysfunction (or both), and neurological deficit), any other preoperative factor, prematurity (neonates and infants), and weight (neonates and infants). Variation across centers was assessed. Centers for which the 95% confidence interval for the observed-to-expected mortality ratio does not include unity are identified as lower-performing or higher-performing programs with respect to operative mortality. RESULTS Included were 52,224 operations from 86 centers. Overall discharge mortality was 3.7% (1,931 of 52,224). Discharge mortality by age category was neonates, 10.1% (1,129 of 11,144); infants, 3.0% (564 of 18,554), children, 0.9% (167 of 18,407), and adults, 1.7% (71 of 4,119). For all patients, 12 of 86 centers (14%) were lower-performing programs, 67 (78%) were not outliers, and 7 (8%) were higher-performing programs. CONCLUSIONS The 2014 Society of Thoracic Surgeons Congenital Heart Surgery Database Mortality Risk Model facilitates description of outcomes (mortality) adjusted for procedural and for patient-level factors. Identification of low-performing and high-performing programs may be useful in facilitating quality improvement efforts.

The Rush to Atrial Septal Defect Closure: Is the Introduction of Percutaneous Closure Driving Utilization?

BACKGROUND Surgical repair of isolated atrial septal defect (ASD) and patent foramen ovale (PFO) has been largely supplanted by percutaneous closure. Whether the perceived benefit of percutaneous closure has lowered thresholds for intervention and thus increased overall utilization rates is unknown. We sought to determine nationwide trends in the use of percutaneous compared with surgical closure and their respective outcomes over an 18-year period. METHODS Using the Nationwide Inpatient Sample and International Classification of Diseases, Ninth Revision, procedure and diagnosis codes, we identified all ASD/PFO closures performed from 1988 to 2005. National estimates and their standard deviations were calculated. Logistic regression analysis identified determinants of closure type. RESULTS We identified 15,482 secundum ASD/PFO closures between 1988 and 2005, yielding a national estimate of 79,841 cases. Of these, 5,495 (national estimate, 27,554 +/- 2,526) were percutaneous, 10,278 (national estimate, 53,710 +/- 1,451) were surgical. The ASD/PFO closures per capita increased dramatically from 1.08 per 100,000 population in 1988 to 2.59 per 100,000 population in 2005, an increase of 139%. When analyzed by closure type, surgical closure increased by only 24% (from 0.86 per 100,000 population in 1988 to 1.07 per 100,000 in 2005) whereas percutaneous closure increased by 3,475% (from 0.04 per 100,000 population in 1988 to 1.43 per 100,000 in 2005). A marked shift in repair type occurred in 2001. Estimated mortality rates remained near 1% for both closure types over time. CONCLUSIONS Nationwide utilization of ASD/PFO repair has increased over time, largely attributable to the dramatic rise in percutaneous closure. Despite the substantial increase in utilization, mortality has remained constant. In the absence of meaningful benchmarks, prospective studies comparing outcomes and criteria for surgical versus percutaneous closure are needed to determine whether the increased rates of ASD closure are justified.

Accuracy of intraoperative touch imprint cytologic analysis of sentinel lymph nodes in breast cancer

BACKGROUND Eliminating full axillary dissection (AD) in the face of negative sentinel lymph nodes (SLN) has become increasingly popular. We sought to evaluate the accuracy of intraoperative touch imprint cytology in detecting clinically significant metastatic involvement of the SLN. METHODS Retrospective review of intraoperative cytology and final hematoxylin-eosin stain evaluation of sentinel nodes examined in a community hospital from 1997 to 2002. RESULTS During that period 1,585 patients underwent axillary dissection; 380 had SLN identification with 142 patients undergoing intraoperative cytologic evaluation of 446 SLNs. Fourteen patients with negative intraoperative cytology had involvement of a SLN on final hematoxylin-eosin examination, for a sensitivity of 75%, specificity of 100%, negative predictive value of 95%, and a false negative rate of 4.9%. In all but 1 case the metastasis was microscopic and measured 2 mm or less. Seven patients went on to completion axillary dissection (50%) with no additional nodal involvement found. CONCLUSIONS Intraoperative touch imprint cytology is accurate in predicting clinically significant SLN pathology. Although the false negative rate in this series was 4.9%, in all but 1 case it represented micrometastatic disease that may not necessarily require completion axillary dissection.

The importance of patient-specific preoperative factors: an analysis of the society of thoracic surgeons congenital heart surgery database.

BACKGROUND The most common forms of risk adjustment for pediatric and congenital heart surgery used today are based mainly on the estimated risk of mortality of the primary procedure of the operation. The goals of this analysis were to assess the association of patient-specific preoperative factors with mortality and to determine which of these preoperative factors to include in future pediatric and congenital cardiac surgical risk models. METHODS All index cardiac operations in The Society of Thoracic Surgeons Congenital Heart Surgery Database (STS-CHSD) during 2010 through 2012 were eligible for inclusion. Patients weighing less than 2.5 kg undergoing patent ductus arteriosus closure were excluded. Centers with more than 10% missing data and patients with missing data for discharge mortality or other key variables were excluded. Rates of discharge mortality for patients with or without specific preoperative factors were assessed across age groups and were compared using Fishers exact test. RESULTS In all, 25,476 operations were included (overall discharge mortality 3.7%, n=943). The prevalence of common preoperative factors and their associations with discharge mortality were determined. Associations of the following preoperative factors with discharge mortality were all highly significant (p<0.0001) for neonates, infants, and children: mechanical circulatory support, renal dysfunction, shock, and mechanical ventilation. CONCLUSIONS Current STS-CHSD risk adjustment is based on estimated risk of mortality of the primary procedure of the operation as well as age, weight, and prematurity. The inclusion of additional patient-specific preoperative factors in risk models for pediatric and congenital cardiac surgery could lead to increased precision in predicting risk of operative mortality and comparison of observed to expected outcomes.

Surgeon and Center Volume Influence on Outcomes After Arterial Switch Operation: Analysis of the STS Congenital Heart Surgery Database

BACKGROUND The relative impact of center volume and of surgeon volume on early outcomes after the arterial switch operation (ASO) is incompletely understood. METHODS Neonates in the Society of Thoracic Surgeons Congenital Heart Surgery Database (2005-2012) undergoing ASO for transposition of the great arteries were included in the analysis. Multivariable logistic regression with adjustment for patient factors and ventricular septal defect closure was used to evaluate relationships between annual center and surgeon volume and a composite end point (in-hospital mortality or major complications). RESULTS The study included 2,357 patients (84 centers, 155 surgeons). Median annual ASO center volume was 4 (range, 1 to 18). Median annual surgeon volume was 2 (range, 0.1 to 11). In-hospital mortality was 3.4%; 14.7% had major morbidity and 15.5% met the composite end point. Analyzed individually, lower center and surgeon volumes were each associated with the composite end point (odds ratios for centers with 2 versus 10 cases/y, 1.92; 95% confidence interval, 1.23 to 2.99); odds ratios for surgeons with 1 versus 6 cases/y, 2.16; 95% confidence interval, 1.42 to 3.26). When analyzed together, the addition of surgeon volume to the center volume models attenuated but did not completely mitigate the association of center volume with outcome (relative attenuation of odds ratio = 31%). Addition of center volume to surgeon volume models attenuated the association of surgeon volume with outcome to a lesser degree (relative attenuation of odds ratio = 11%). CONCLUSIONS Center and surgeon volume each influence early outcomes after ASO; however, surgeon volume appears to play a more prominent role. Surgeon and center ASO volume should be considered in the context of initiatives to improve outcomes from ASO for transposition of the great arteries.