Prevalencia e incidencia de hiperpotasemia en población española con insuficiencia cardiaca con fracción de eyección deprimida: revisión sistemática y relevancia poblacional

Background and objectives: Hyperkalaemia (K⁺ levels ≥ 5.5 mmol/L) is a severe ion imbalance that occurs in patients who have heart failure (HF) with reduced ejection fraction (HFrEF) and increases the risk of ventricular fibrillation. Given that there are no estimates on the number of patients with this complication, the aim of this study was to estimate the prevalence and incidence of hyperkalaemia in patients with HFrEF in Spain. Material and methods: Based on a systematic literature search and through a meta-analysis, we calculated an HFrEF prevalence of ≤ 40% in the European and U.S. population. Based on another systematic literature search, we calculated the prevalence of hyperkalaemia in patients with HF and its annual incidence rate. Considering the previous values and the Spanish population pyramid in 2016, we estimated the number of individuals with HFrEF who currently have hyperkalaemia and those who develop it each year in Spain. Results: Approximately 17,100 (10,000 men and 7100 women) of the 508,000 patients with HFrEF in Spain have hyperkalaemia. Furthermore, approximately 14,900 patients with HFrEF (9500 men and 5400 women) develop hyperkalaemia each year. Conclusions: Approximately 1 of every 30 patients with HFrEF has plasma potassium values > 5.5 mmol/L.