This article refers to 'Association of time-to-intravenous furosemide with mortality in acute heart failure: data from REPORT-HF' by W. Ouwerkerk et al., published in this issue on pages 43-51.There are acute cardiovascular conditions in which the speed of treatment is directly correlated with clinical outcomes -most notably, in ST-elevation myocardial infarction ('door-to-balloon time') and in cardiac arrest (time to defibrillation). The success of efforts to increase the speed of treatment in such diseases has prompted clinicians to explore whether more rapid care delivery might lead to improved outcomes for other similar diagnoses. Acute heart failure (AHF) is one of the most common causes of hospitalization worldwide and is associated with significant morbidity and mortality. 1 Decompensation is most often characterized by signs and symptoms of congestion, and the backbone of treatment is typically the escalation of diuretics. Prior work exploring the relationship between the speed of diuretic delivery (i.e. 'door-to-diuretic time') and clinical outcomes in AHF has revealed largely neutral results. [2][3][4][5][6] In this issue of the Journal, Ouwerkerk and colleagues provide a valuable contribution to this body of work. 7 Utilizing the international, multicentre, REPORT-HF registry, 8 the authors assessed the association of time-to-diuretics with in-hospital and 30-day conditional post-discharge mortality in 15 078 patients presenting with AHF between 2014 and 2017. In their analysis, time-to-diuretic was not associated with in-hospital mortality. However, longer time-to-diuretic was associated with higher 30-day conditional post-discharge mortality. This association was increased amongst patients with higher baseline risk based on the ADHERE risk score, 9 and was not modified by left ventricular ejection fraction or geographic region.This study has several notable strengths. Prior investigations of time-to-diuretic and outcomes in AHF have generally analysed data from single centres or individual countries. [2][3][4][5][6] This study utilized prospectively collected data from subjects in 44 countries, resulting in the most diverse and representative global cohort to date in which this relationship has been evaluated.