Matthew Oster et al. JACC 2019;73:1579-1595 Mean Difference in RVSP Before and After ASD Closure* *This illustrates RVSP treatment effect (i.e., after treatment minus before treatment) with the noniterative DerSimonian-Laird and Bayesian methods. ASD indicates atrial septal defect; CI, confidence interval; df, degrees of freedom; and RVSP, right ventricular systolic pressure. Matthew Oster et al. JACC 2019;73:1579-1595 2019 American Heart Association, Inc., and the American College of Cardiology Foundation