Multimodal Visualization and Explainable Machine Learning–Driven Markers Enable Early Identification and Prognosis Prediction for Symptomatic Aortic Stenosis and Heart Failure With Preserved Ejection Fraction After Transcatheter Aortic Valve Replacement: Multicenter Cohort Study - Jun Wang; Jiajun Zhu; Hui Li; Shili Wu; Siyang Li; Zhuoya Yao; Tongjian Zhu; Bi Tang; Shengxing Tang; Jinjun Liu (Journal of Medical Internet Research)