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(a) Receiver operating characteristic (ROC) curve for predicting heart failure-related death according to intra-renal vein Doppler score at admission (area under the curve (AUC) 89.1%; p < 0.001) and VExUS score (AUC 83.2%; p < 0.001). (b) ROC curve for predicting heart failure-related re-admission according to portal vein score at admission (AUC 69.6%; p = 0.011) and VExUS score (AUC 67.6%; p = 0.023).
