Abstract
BACKGROUND: There is a complex relationship between heart failure (HF) clinic services and health outcomes. We hypothesized that ambulatory clinic activity may be associated with both hospital admission and also with avoidance of admission. METHODS: A retrospective comparative cohort study was conducted examining activity in an ambulatory HF Clinic. Consecutive clinic visits in 2013 were recorded (n = 1728) and periods of high-intensity utilization (HIU) were identified (n = 128). A HIU period was defined by ≥2 consecutive clinic visits within 30 days, ending after 30 days passed without an additional clinic visit. For each HIU period identified, patient characteristics (n = 107) and all clinic visits (n = 324) were examined. HIU periods were then classified by association with hospital admission (±30 days). RESULTS: In 2013, 18.8% of all clinic visits occurred during HIU periods, involving 13.7% of the clinic population. Thirty-eight percent of HIU periods were associated with 62 total hospital admissions (±30 days), of which 58% (n = 36) were for a primary diagnosis of HF. In addition,17 HIU periods met criteria for admission avoided, and 7 HIU periods occurring after hospital discharge also met criteria for admission avoided. CONCLUSIONS: We identified periods of intensive ambulatory clinic activity dedicated to patients with high burdens of comorbidities and both HF and non-HF-related admissions. These periods were also associated with episodes of successful decongestion with oral diuretics, resulting in avoidance of admission. Identifying HF patients who can be treated successfully or who are likely to require admission may be helpful for allocating clinic resources.