Percentage of in-hospital mortality, 30-day mortality, and prolonged hospitalization in the FAST-FURO and CONTROL groups. The analysis is presented for the whole cohort (left), by each risk category of the MEESSI scale (middle), and in 599 pairs of patients matched by the propensity score to be treated with intravenous furosemide before arrival to the emergency department (right). ^aOnly 8213 out of 12 594 (65.2%) were classified by the MEESSI risk score and in 599 pairs of patients matched by propensity score. ^bOnly 8148 out of 12 498 (65.2%) were classified by the MEESSI risk score and in 599 pairs of patients matched by propensity score. ^cOnly 8127 out of 12 447 (65.3%) were classified by the MEESSI risk score and in 599 pairs of patients matched by propensity score. ED, emergency department; EMS, emergency medical service; PS, propensity score.