Prehospital emergency care of patients with acute heart failure in Spain: the SEMICA study (Emergency Medical Response Systems for Patients with Acute Heart Failure)

Abstract

Objectives. To study the means of emergency transport used to bring patients with acute heart failure (AHF) to hospital emergency departments (EDs) and explore associations between factors, type of transport, and prehospital care received. Methods. We gathered the following information on patients treated for AHF at 34 Spanish hospital EDs: means of transport used (medicalized ambulance [MA], nonmedicalized ambulance [NMA], or private vehicle) and treatments administered before arrival at the hospital. Twenty-seven independent variables potentially related to type of transport used were also studied. Indicators of AHF severity were triage level assigned in the ED, need for admission, need for intensive care, in-hospital mortality, and 30-day mortality. Results. A total of 6106 patients with a mean (SD) age of 80 years were included; 56.5% were women, 47.2% arrived in PVs, 37.8% in NMAs, and 15.0% in MAs. Use of an ambulance was associated with female sex, age over 80 years, chronic obstructive pulmonary disease, a history of AHF, functional dependency, New York Heart Association class III-IV, sphincteral incontinence, labored breathing, orthopnea, cold skin, and sensory depression or restlessness. Assignment of a MA was directly associated with living alone, a history of ischemic heart disease, cold skin, sensory depression or restlessness, and high temperature; it was inversely associated with a history of falls. The rates of receipt of prehospital treatments and AHF severity level increased with use of MAs vs. NMAs vs. PV. Seventy-three percent of patients transported in MAs received oxygen, 29% received a diuretic, 13.5% a vasodilator, and 4.7% noninvasive ventilation. Conclusions. Characteristics of the patient with AHF are associated with the assignment of type of transport to a hospital ED. Assignment appears to be related to severity. Treatment given during MA transport could be increased.