Vnitr Lek 2023, 69(2):109-118 | DOI: 10.36290/vnl.2023.018

Dosing of basic pharmacotherapy and its effect on the prognosis of patients hospitalized for heart failure

Tomáš Krynský¹, Otto Mayer Jr.^{1, 2}, Jan Bruthans³, Simona Bílková¹, Josef Jirák⁴

¹ II. interní klinika, Lékařská fakulta v Plzni, Univerzita Karlova a Fakultní nemocnice Plzeň

² Biomedicínské centrum, Univerzita Karlova, Lékařská fakulta a Fakultní nemocnice, Plzeň

³ Centrum kardiovaskulární prevence, Thomayerova nemocnice a 1. lékařská fakulta Univerzity Karlovy, Praha

⁴ Správa informačního systému, Fakultní nemocnice, Plzeň

Background: We analyzed the prescription and dosage of essential pharmacotherapy in chronic heart failure (HF) at the time of discharge from the hospitalization for cardiac decompensation and how it may have influenced the prognosis of the patients.

Methods: We followed 4097 patients [mean age 70.7, 60.2% males] hospitalized for HF between 2010 and 2020. The vital status we ascertained from the population registry, other circumstances from the hospital information system.

Results: The prescription of beta-blockers (BB) was 77.5% (or only 60.8% of BB with evidence in HF), 79% of renin-angiotensin system (RAS) blockers, and 45.3% of mineralocorticoid receptor antagonists (MRA). Almost 87% of patients were treated with furosemide at the time of discharge, while only ≈53% of patients with ischemic etiology of HF took a statin. The highest target dose of BB was recommended in ≈11% of patients, RAS blockers in ≈ 24%, and MRA in ≈ 12% of patients. In patients with concomitant renal insufficiency, the prescription of BB and MRA was generally less frequent and on a significantly lower dosage. In contrast, the opposite was true for the RAS blocker (however statistically insignificant). In patients with EF ≤ 40%, the prescription of BB and RAS blockers were more frequent but in a significantly lower dosage. On the contrary, MRAs were recommended in these patients more often and in higher doses. In terms of mortality risk, patients treated only with a reduced dose of RAS blockers showed a 77% higher risk of death within one year (or 42% within five years). A significant relationship was also found between mortality and the recommended dose of furosemide.

Conclusions: The prescription and dosage of essential pharmacotherapy are far from optimal, and in the case of RAS blockers, this affected the patient's prognosis as well.

Keywords: chronic heart failure, cardiac decompensation, dose, mortality, therapy.

Accepted: March 23, 2023; Published: March 30, 2023  Show citation