Hyperkalemia during spironolactone use in patients with decompensated heart failure.

Abstract:

BACKGROUND:The incidence of hyperkalemia related to spironolactone use is low in stable heart failure; however, it has not been studied during decompensation. OBJECTIVE:To evaluate the influence of spironolactone on serum potassium in decompensated heart failure (HF). METHODS:In a cohort study, patients that had been hospitalized due to decompensated HF, with left ventricular ejection fraction (LVEF) < 0.45 and serum potassium between 3.5 and 5.5 mEq/l were selected. The patients were divided according to spironolactone use (Group S) or no use (Group C). The outcome was potassium increase (> 6.0 mEq/l) and the use of calcium polystyrene. A multivariate analysis through logistic regression was carried out and values of p < 0.05 were considered significant. RESULTS:A total of 186 patients (group S: 56; group C: 130) were studied; LVEF of 0.25, aged 55.5 years and 65.2% of them males. The incidence of hyperkalemia was 10.7% in group S and 5.4% in group C (p = 0.862). The multivariate analysis showed that serum urea > 60.5 mg/dl during the hospitalization presents a relative risk of 9.6 (95%CI 8.03 - 11.20; p = 0.005) for the occurrence of hyperkalemia. CONCLUSION:The incidence of hyperkalemia was two-fold higher with spironolactone use, but it was not statistically significant. The increase in urea levels was associated to the hyperkalemia. Randomized studies are necessary to clarify this issue.

journal_name

Arq Bras Cardiol

authors

Lima MV,Ochiai ME,Cardoso JN,Morgado PC,Munhoz RT,Barretto AC

doi

10.1590/s0066-782x2008001500009

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

177-82, 194-9

issue

3

eissn

0066-782X

issn

1678-4170

pii

S0066-782X2008001500009

journal_volume

91

pub_type

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