Usefulness of urinary potassium to creatinine ratio to predict diuretic response in patients with acute heart failure and preserved ejection fraction. - Llàcer P; Núñez J; Croset F; García M; Fabregate M; Ruiz R; López G; Fernández C; Del Hoyo B; Campos J; Gomis A; Manzano L (Clinical cardiology, 2023)