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The prevalence of anemia and its impact on hospitalization mortality in patients with acute heart failure


Authors: R. Miklík 1;  M. Felšöci 1;  J. Pařenica 1;  D. Tomčíková 2;  J. Jarkovský 2;  J. Špinar 1
Authors‘ workplace: Interní kardiologická klinika Lékařské fakulty MU a FN Brno, pracoviště Bohunice, přednosta prof. MU Dr. Jindřich Špinar, CSc., FESC 1;  Institut bio­statistiky a analýz Lékařské a Přírodovědecké fakulty MU Brno, ředitel doc. RNDr. Ladislav Dušek, Ph. D. 2
Published in: Vnitř Lék 2010; 56(5): 382-391
Category: Original Contributions

Overview

Aim of study:
To evaluate the influence of entry hemoglobin level on the hospitalization mortality of the patients admitted with AHF caused by 4 major etiologies –  acute coronary syndrome with ST elevation (STEMI, n = 325) and without ST elevation (nonSTEMI, n = 210), decompensated chronic ischaemic heart disease (IHD, n = 206) and dilated cardiomyopathy (CMP, n = 88).

Results:
We analyzed 1,253 consecutive 1st‑ time hospitalizations of AHF patients of whom 1,212 had their entry hemoglobin known. Out of these, 829 subjects were of STEMI (1), nonSTEMI (2), IHD (3) and CMP (4) etiology and were included in further analyses. We devided these patients into subgroups according to hemoglobin levels: I –  no anemia, II –  minor and III –  severe anemia. The hospitalization mortality in subgroups (I– II– III) of each etiology was 16.9– 24.5– 35.3% (1); 12.4– 9.8– 35.7% (2); 9.0– 9.7– 18.2% (3); 1.5– 21.4– 33.3% (4); all etiologies together 12.4– 15.0– 28.8%, total rate 14.1%. Univariate analysis (χ2) showed significant differencies in hospitalization mortality depending on etio­logy and hemoglobin level but not type of failure (de novo/ decompensation). Other parametres (comorbidities, laboratory and hemodynamic values, medication at entry) had a very variable impact on mortality throughout etiologies and hemoglobin subgroups.

Conclusion:
The presence of anemia increases hospitalization mortality of patients with acute heart failure. The relation between hemoglobin level and mortality seems to be linear, we did not observe „U shape“ type of relation. It is necessary to distinguish etiologies of AHF as well as consider effects of laboratory and anamnestic variables when interpreting the results.

Key words:
prevalence –  anemia –  haemoglobin –  acute heart failure –  hospitalization mortality


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