Prevalence of treatment, risk factors, and management of atrial septal defects in a pediatric Medicaid cohort.

Atrial septal defects (ASDs) vary greatly depending on their size, age at closure, and clinical management. This report characterizes the prevalence, complexity, and clinical management of these lesions in a statewide pediatric cohort and examines predictors for receiving closures. A 15-year Medicaid data set (1996-2010) from one state was analyzed. The selection criteria specified patients 17 years of age or younger with a diagnosis of ASD primum, secundum, or sinus venosus on one or more service visits to a pediatrician or pediatric cardiologist. During the 15-year period, ASDs represented a prevalence rate for treatment of 0.47/1000 CHDs identified, with 61 % presenting as complex lesions. Concomitant cardiac anomalies that might have a negative impact on prognosis were present including patent ductus arteriosus (26.1 %), pulmonary hypertension (3.8 %), and supraventricular tachycardia (2.4 %). Pharmacologic treatments, predominantly diuretics, were prescribed for 21 % of the cohort. Both surgical closures (6.3 %) and transcatheter closures (1.4 %) were used for ASD secundum cases, whereas surgical closures predominated for ASD primum (25.6 %) and sinus venosus (13.5 %) lesions. The postoperative follow-up period was two to three times longer for children with ASD primum or sinus venosus than for those with ASD secundum (average, ~1 year). Factors predicting the likelihood of having ASD closure were older age, having a concomitant patent ductus arteriosus (PDA) repair, treatment with ibuprofen, having two or more concomitant CHDs, and receiving diuretics or preload/afterload-reducing agents. Care of ASDs in routine practice settings involves more complications and appears to be more conservative than portrayed in previous investigations of isolated ASDs.