Interobserver reliability and accuracy of the visual assessment of interventricular septal flattening in pulmonary hypertension.

Background: Interventricular septal (IVS) flattening is a key echocardiographic feature of pulmonary hypertension (PH) that is associated with worse outcomes. The accuracy and interobserver reliability of visual and quantitative measures of IVS in PH patients are poorly described.

Methods: This single-center, retrospective analysis included 173 PH patients.