An Implementation Study to Improve Care of Patients With Acute Heart Failure in the Emergency Department

Background: Heart failure is a syndrome that results from impairment of ventricular filling or ejection of blood. Patients with acute heart failure (AHF) commonly present to the emergency department (ED) with increased shortness of breath and often have poor outcomes or death. Management of AHF is very complex and entails assessment, multiple treatment options, and the difficult decision of whether to hospitalize or discharge. Unfortunately, there are no specific guidelines for how to manage AHF in the ED. The Canadian Cardiovascular Society (CCS) has very detailed high-quality guidelines for heart failure, but these are not specific for AHF or the ED setting.

The investigators recently created the Canadian Association of Emergency Physicians (CAEP) AHF Best Practices Checklist by adapting the CCS guidelines with a panel of 32 emergency physicians, cardiologists, intern-ists, methodologists, and patients. This concise document provides specific guidance for ED physicians and was recently published (Can J Emerg Med Sept 2025).

Study Objective: Our overall goal is to improve care of AHF patients in Canadian EDs and our specific objective is to conduct an implementation study of the CAEP AHF Checklist to decrease mortality and morbidity.

Methods: Design: Cross-sectional 4-sequence 5 period stepped-wedge cluster study in which the "clinical intervention" is the CAEP AHF Checklist, and the "implementation intervention" is the introduction of the Checklist into ED physician practice. Over 30 months, 3 hospitals will cross over every 6 months from the control to the intervention period. There will be a 2-month transition period. Setting: 12 large EDs in 5 provinces. Subjects: All physicians managing AHF in the ED are the primary study participants (emergency, medicine, cardiology, and hospitalists). The patients to be included are consecutive adults age >18 who present with shortness of breath due to AHF. Interventions: The clinical intervention is the CAEP AHF Checklist and the implementation intervention are the behaviour change strategies to encourage the adoption of and adherence to the Checklist into the practice of the physicians managing AHF patients (during the intervention periods of the trial). Outcomes: The primary outcome will be a composite of 3 clinical effectiveness variables: 1) Mortality <30 days, 2) Deterioration post index visit admission, requiring endotracheal intubation or non-invasive ventilation, or 3) Relapse back to ED requiring hospital admission <14 days. Secondary effectiveness outcomes include any of the individual com-ponents of the composite primary outcome. Secondary implementation outcomes include adherence to the Checklist by review of quality indicators and surveys to measure penetration and acceptability. Data Analysis: The primary outcome will be analyzed according to the intention to treat principle, adhering to the randomized schedule of implementation. The unit of analysis will be the individual patient using mixed effects logistic regression accounting for the stepped wedge design. A priori subgroups will be sex male/female, age >75/<75 years, and admitted/discharged. Sample Size: The investigators estimate a total enrollment of 5,040 cases.

Importance: If the investigators demonstrate that local implementation of the CAEP AHF Checklist improves patient management and outcomes, this justifies widespread scaling of the initiative to all EDs in Canada and elsewhere worldwide.