Beat-Level Echocardiographic Clip Analysis with Geometry-Video Fusion and Cross–Attention for Accurate Ejection Fraction Estimation and Heart Failure Stratification
The proposed framework, combining beat-level motion analysis and geometric features with Shapley Additive Explanations- and Gradient-Weighted Class Activation Mapping-based explainability, enables quantification of ejection fraction and clinically reliable heart failure classification, thereby scaling echocardiographic...