 Blood speckle imaging, BSI, is an echocardiographic approach that provides detailed visualization of flow patterns and quantification of parameters from ultrasound data, which can aid in post-operative decision-making after subaortic membrane resection and aortic valve repair. BSI enhances the quantitative evaluation of the left ventricular outflow track beyond traditional echocardiographic parameters. But larger studies are needed to validate these findings and establish standardized protocols for clinical implementation. This article was authored by Elias Sundstrom, Michael Jung, Honey K. Naj, and others.