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Short and long-term prognostic value of hyponatremia in heart failure with preserved ejection fraction versus reduced ejection fraction: An analysis of the Korean Acute Heart Failure registry

Authors
 Jin Joo Park  ;  Young-Jin Cho  ;  Il-Young Oh  ;  Hyun-Ah Park  ;  Hae-Young Lee  ;  Kye Hun Kim  ;  Byung-Su Yoo  ;  Seok-Min Kang  ;  Sang Hong Baek  ;  Eun-Seok Jeon  ;  Jae-Joong Kim  ;  Myeong-Chan Cho  ;  Shung Chull Chae  ;  Byung-Hee Oh  ;  Dong-Ju Choi 
Citation
 International Journal of Cardiology, Vol.248 : 239-245, 2017 
Journal Title
 International Journal of Cardiology 
ISSN
 0167-5273 
Issue Date
2017
MeSH
Acute Disease ; Aged ; Aged, 80 and over ; Cohort Studies ; Female ; Heart Failure/diagnosis* ; Heart Failure/epidemiology* ; Heart Failure/physiopathology ; Humans ; Hyponatremia/diagnosis* ; Hyponatremia/epidemiology* ; Hyponatremia/physiopathology ; Male ; Middle Aged ; Prognosis ; Prospective Studies ; Registries* ; Republic of Korea/epidemiology ; Stroke Volume/physiology* ; Time Factors
Keywords
Heart failure with preserved ejection fraction ; Heart failure with reduced ejection fraction ; Hyponatremia ; Prognosis
Abstract
BACKGROUND: Hyponatremia is a well-known risk factor for worse outcomes in heart failure (HF) patients. The impact of hyponatremia according to the ejection fraction (EF) is unclear. We evaluated the prognostic value of hyponatremia according to HF type. METHODS AND RESULTS: The Korea Acute Heart Failure (KorAHF) registry consecutively enrolled 5625 patients. Hyponatremia was defined as serum sodium level<135mmol/L at hospital admission. HF with preserved and reduced ejection fraction were defined as an LVEF ≥50% and LVEF ≤40%, respectively. Among 5103 patients with available EF, 2088 (60%) had HFrEF, and 1284 (25%) had HFpEF. There was no difference in serum sodium level between the groups (HFrEF: 137.4±4.7mmol/L vs. HFpEF: 137.5±5.0mmol/L, P=0.710). Hyponatremic patients had higher in-hospital mortality or urgent heart transplantation in all (11.3% vs. 4.5%, P<0.001), in HFrEF (13.1% vs. 4.9%, P<0.001), and in HFpEF (6.0% vs. 1.9%, P<0.001). After adjustment for significant covariates, hyponatremia was associated with 1.5 fold increased risk for 1-year post-discharge death in the HFrEF group (HR, 1.52; 95% CI, 1.24-1.86), but not in the HFpEF group (HR, 1.16; 95% CI, 0.84-1.61). During admission, the sodium status changed in 22% of the patients and the discharge sodium status had greater prognostic value. CONCLUSIONS: Hyponatremia is independent of HF type. Hyponatremia is a significant risk factor for adverse in-hospital outcomes; however its long-term prognostic value is only limited to patients with HFrEF, but not for those with HFpEF.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/161153
DOI
10.1016/j.ijcard.2017.08.004
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실)
Yonsei Authors
강석민(Kang, Seok Min)
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Full Text
https://www.sciencedirect.com/science/article/pii/S0167527317335970
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