Explainable Graph Convolutional Network Framework for Robust ECG Arrhythmia Classification and Patient-Level Risk Stratification - Abu Monsur Mohammad Fahim; Md. Eftekhar Alam; Md Saiful Islam; Riadul Islam Rabbi; Ekramul Haque Tusher; Md. Jakir Hossen; Aritra Mohajan (Informatica, 2026)