Karl F. Welke

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OBJECTIVE We sought to determine the association between pediatric cardiac surgical volume and mortality using sophisticated case-mix adjustment and a national clinical database. METHODS Patients 18 years of age or less who had a cardiac operation between 2002 and 2006 were identified in the Society of Thoracic Surgeons Congenital Heart Surgery Database(More)
OBJECTIVE We describe patient characteristics and postoperative morbidity and mortality rates for patients with Down syndrome undergoing congenital heart disease surgery. METHODS This retrospective cohort study used the Society of Thoracic Surgeons Congenital Heart Surgery Database to compare patient characteristics and postoperative outcomes for patients(More)
BACKGROUND We used The Society of Thoracic Surgeons National Cardiac Database to document the utilization of surgical atrial fibrillation (AF) correction procedures in North America. We also examined the subset of patients having mitral valve surgery to determine whether concurrent surgical AF correction procedures were associated with an increased risk of(More)
OBJECTIVE The evaluation of operative mortality risk for cardiac surgery in infants with low weight is limited. To determine whether low weight is a risk factor for increased mortality, we reviewed the experience within the Society of Thoracic Surgeons Congenital Heart Surgery Database of infants who have undergone surgical correction or palliation for(More)
OBJECTIVE Analysis of congenital heart surgery results requires a reliable method of estimating the risk of adverse outcomes. Two major systems in current use are based on projections of risk or complexity that were predominantly subjectively derived. Our goal was to create an objective, empirically based index that can be used to identify the statistically(More)
BACKGROUND In pediatric cardiac surgery, infection is a leading cause of morbidity and mortality. We created a model to predict risk of major infection in this population. METHODS Using the Society of Thoracic Surgeons Congenital Heart Surgery Database, we created a multivariable model in which the primary outcome was major infection (septicemia,(More)
OBJECTIVE We sought to examine the relationship between extracorporeal membrane oxygenation center case volume and survival in pediatric patients requiring extracorporeal membrane oxygenation support. METHODS Pediatric patients (≤ 20 years) undergoing extracorporeal membrane oxygenation cannulation were identified using the Healthcare Cost and Utilization(More)
BACKGROUND This investigation was designed to determine long-term survival, reoperation rates, and functional status after surgical repair of partial atrioventricular septal defect (PAVSD). METHODS This population-based cohort study with cumulative, prospective follow-up by questionnaire and medical record review included all patients aged younger than 19(More)
OBJECTIVES We aimed to describe management strategies for neonates with hypoplastic left heart syndrome over the past 18 years in the United States and to identify determinants of institutional management decisions. METHODS Neonates with hypoplastic left heart syndrome were retrospectively identified by use of the Nationwide Inpatient Sample 1988-2005.(More)
BACKGROUND While general thoracic surgical procedures are performed by several different surgical subspecialties, debate remains as to whether surgeon specialty impacts outcomes. METHODS The Nationwide Inpatient Sample (NIS) was queried for procedure codes for pneumonectomy, lobectomy, limited lung resection, and decortication. We constructed multivariate(More)