Association of Early Tolvaptan Treatment and Length of In Hospital Stay in Elderly Patients with Acute Decompensated Heart Failure

Introduction: Long hospital stay is associated with high costs and poor quality of life in elderly patients with heart failure (HF). This study aimed to investigate the association of early administration of tolvaptan with length of hospital stay among elderly patients with HF.

Methods: The cohort included elderly patients (age ≥ 75 years) admitted to Shinonoi General Hospital between July 2016 and December 2018 with a primary diagnosis of acute decompensated HF treated with tolvaptan. Patients who died during hospitalization, patients who had acute coronary syndrome, patients who required treatment in the intensive care unit, and patients who had already taken tolvaptan before admission were excluded. Patients were divided into two groups according to the median duration of admission to tolvaptan administration: those who received tolvaptan within 1 day (24 h) after admission (early treatment group) and those for whom tolvaptan was prescribed after 1 day (24 h) or more from hospitalization (add-on group). We compared the length of hospital stay between the two groups and investigated the relationship between early tolvaptan administration and length of hospital stay.

Results: Of 110 enrolled patients (median age 85 years), 56 (51%) received tolvaptan within 1 day (24 h) after admission. The median length of hospital stay was 22 [14-35] days. The length of hospital stay was significantly shorter in the early treatment group (16 [11-22] days vs. 30 [21-46] days, p < 0.001). On multivariable regression analysis, early tolvaptan was associated with shorter hospital stay after adjusting for age, sex, serum creatinine, B-type natriuretic peptide, continuous dobutamine, and whether they live alone (partial regression coefficient -16.213, p < 0.001). Linear regression analysis showed a positive relationship between time of tolvaptan administration and length of hospital stay (R² = 0.564, p < 0.001).

Conclusions: Early tolvaptan administration was associated with reduced length of hospital stay in elderly HF.