Andrew C Glatz1, Kevin F Kennedy2, Jonathan J Rome3, Michael L O'Byrne4. 1. Division of Cardiology, Children's Hospital of Philadelphia, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address: glatz@email.chop.edu. 2. Mid America Heart Institute St. Luke's Health System, Kansas City, Missouri. 3. Division of Cardiology, Children's Hospital of Philadelphia, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania. 4. Division of Cardiology, Children's Hospital of Philadelphia, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Leonard Davis Institute for Health Care Policy, University of Pennsylvania, Philadelphia, Pennsylvania.
Abstract
OBJECTIVES: The authors sought to study variation in the practice of balloon aortic (BAV) and pulmonary valvuloplasty (BPV). BACKGROUND: The IMPACT (IMProving Adult and Congenital Treatment) registry provides an opportunity to study practice variation in transcatheter interventions for congenital heart disease. METHODS: The authors studied BAV and BPV in the IMPACT registry from January 1, 2011, to September 30, 2015, using hierarchical multivariable models to measure hospital-level variation in: 1) the distribution of indications for intervention; and 2) in cases with "high resting gradient" as the indication, consistency with published guidelines. RESULTS: A total of 1,071 BAV cases at 60 hospitals and 2,207 BPV cases at 75 hospitals were included. The indication for BAV was high resting gradient in 82%, abnormal stress test or electrocardiogram (2%), left ventricular dysfunction (11%), and symptoms (5%). Indications for BPV were high resting gradient in 82%, right-left shunt (6%), right ventricular dysfunction (7%), and symptoms (5%). No association between hospital characteristics and distribution of indications was demonstrated. Among interventions performed for "high resting gradient," there was significant adjusted hospital-level variation in the rates of cases performed consistently with guidelines. For BAV, significant differences were seen across census regions, with hospitals in the East and South more likely to practice consistently than those in the Midwest and West (p = 0.005). For BPV, no association was found between hospital factors and rates of consistent practice, but there was significant interhospital variation (median rate ratio: 1.4; 95% confidence interval: 1.2 to 1.6; p < 0.001). CONCLUSIONS: There is measurable hospital-level variation in the practice of BAV and BPV. Further research is necessary to determine whether this affects outcomes or resource use.
OBJECTIVES: The authors sought to study variation in the practice of balloon aortic (BAV) and pulmonary valvuloplasty (BPV). BACKGROUND: The IMPACT (IMProving Adult and Congenital Treatment) registry provides an opportunity to study practice variation in transcatheter interventions for congenital heart disease. METHODS: The authors studied BAV and BPV in the IMPACT registry from January 1, 2011, to September 30, 2015, using hierarchical multivariable models to measure hospital-level variation in: 1) the distribution of indications for intervention; and 2) in cases with "high resting gradient" as the indication, consistency with published guidelines. RESULTS: A total of 1,071 BAV cases at 60 hospitals and 2,207 BPV cases at 75 hospitals were included. The indication for BAV was high resting gradient in 82%, abnormal stress test or electrocardiogram (2%), left ventricular dysfunction (11%), and symptoms (5%). Indications for BPV were high resting gradient in 82%, right-left shunt (6%), right ventricular dysfunction (7%), and symptoms (5%). No association between hospital characteristics and distribution of indications was demonstrated. Among interventions performed for "high resting gradient," there was significant adjusted hospital-level variation in the rates of cases performed consistently with guidelines. For BAV, significant differences were seen across census regions, with hospitals in the East and South more likely to practice consistently than those in the Midwest and West (p = 0.005). For BPV, no association was found between hospital factors and rates of consistent practice, but there was significant interhospital variation (median rate ratio: 1.4; 95% confidence interval: 1.2 to 1.6; p < 0.001). CONCLUSIONS: There is measurable hospital-level variation in the practice of BAV and BPV. Further research is necessary to determine whether this affects outcomes or resource use.
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