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Eur J Heart Fail. 2012 Oct;14(10):1139-46. Epub 2012 Jul 9.

Relationship of serum sodium concentration to mortality in a wide spectrum of heart failure patients with preserved and with reduced ejection fraction: an individual patient data meta-analysis(†): Meta-Analysis Global Group in Chronic heart failure (MAGGIC).

Collaborators (156)

Doughty R, Whalley GA, Andersson B, Hall C, Richards AM, Troughton R, Lainchbury J, Berry C, Hogg K, Norrie J, Stevenson K, Brett M, McMurray JJ, Køber L, Torp-Pedersen C, Ahmed A, Lenzen MJ, Scholte WJ, Boersma E, Vantrimpont PJ, Follath F, Swedberg K, Cleland J, Komajda M, Gotsman I, Zwas D, Planer D, Azaz-Livshits T, Admon D, Lotan C, Keren A, Grigorian-Shamagian L, Varela-Roman A, Mazón-Ramos P, Rigeiro-Veloso P, Bandin-Dieguez MA, Gonzalez-Juanatey JR, Guazzi M, Myers J, Arena R, McAlister FA, Ezekowitz J, Armstrong PW, Cujec B, Paterson I, Cowie MR, Wood DA, Coats AJ, Thompson SG, Suresh V, Poole-Wilson PA, Sutton GC, Martínez-Sellés M, Robles JA, Prieto L, Muñoa MD, Frades E, Díaz-Castro O, Almendral J, Registry HF, Tarantini L, Faggiano P, Senni M, Lucci D, Bertoli D, Porcu M, Opasich C, Tavazzi L, Maggioni AP, Kirk V, Bay M, Parner J, Krogsgaard K, Herzog TM, Boesgaard S, Hassager C, Nielsen OW, Aldershvile J, Nielsen H, Køber L, Macín SM, Perna ER, Canella JP, Alvarenga P, Pantich R, Ríos N, Farias EF, Badaracco JR, Madsen BK, Hansen JF, Stokholm KH, Brons J, Husum D, Mortensen LS, Bayes-Genis A, Vazquez R, Puig T, Fernandez-Palomeque C, Bardají A, Pascual-Figal D, Valdes M, Gabarrus A, Ordoñez-Llanos J, Pavon R, Pastor L, Gonzalez-Juanatey JR, Almendral J, Fiol M, Nieto V, Macaya C, Cinca J, de Luna A, Newton JD, Blackledge HM, Squire IB, Wright SP, Whalley GA, Doughty RN, Kerzner R, Gage BF, Freedland KE, Rich MW, Huynh BC, Rovner A, Freedland KE, Carney RM, Rich MW, Taffet GE, Teasdale TA, Bleyer AJ, Kutka NJ, Luchi RJ, Tribouilloy C, Rusinaru D, Mahjoub H, Soulière V, Lévy F, Peltier M, Tsutsui H, Tsuchihashi M, Takeshita A, Kearney MT, Cubbon R, Nolan J, Lee AJ, Prescott RJ, Shah AM, Brooksby WP, Fox KA, Varela-Roman A, Gonzalez-Juanatey JR, Basante P, Trillo R, Garcia-Seara J, Martinez-Sande JL, Gude F.

Author information

  • 1Department of Cardiovascular Diseases, Amiens University Hospital, 80054 Amiens Cedex 1, France.

Abstract

AIMS:

Hyponatraemia has been associated with reduced survival in patients with heart failure and reduced ejection fraction (HF-REF). The relationship between serum sodium and outcome is unclear in heart failure with preserved (≥ 50%) ejection fraction (HF-PEF). Therefore, we used a large individual patient data meta-analysis to study the risk of death associated with hyponatraemia in HF-REF and in HF-PEF.

METHODS AND RESULTS:

This analysis included 14 766 patients from 22 studies that recruited patients without ejection fraction inclusion criterion at baseline and reported death from any cause. Cox proportional analysis was undertaken for hyponatraemia (sodium <135 mmol/L), adjusted for variables of clinical relevance, and stratified by study. The endpoint was death from any cause at 3 years. Patients with hyponatraemia (n = 1618) and patients with normal serum sodium had similar characteristics as regards to age, gender, and ischaemic aetiology. However, patients with hyponatraemia had higher New York Heart Association class and lower blood pressure. At follow-up, there were 335 deaths among 1618 patients with hyponatraemia (21%) and 2128 deaths among 13 148 patients with normal serum sodium (16%). The risk of death appeared to increase linearly with serum sodium levels <140 mmol/L. Hyponatraemia was identified in 1199 HF-REF patients (11%) and 419 HF-PEF patients (11%). Hyponatraemia was independently predictive of death in both HF-REF [adjusted hazard ratio (HR) 1.69, 95% confidence interval (CI) 1.50-1.91] and HF-PEF (adjusted HR 1.40, 95% CI 1.10-1.79, P for interaction 0.20).

CONCLUSION:

Hyponatraemia is a powerful determinant of mortality in patients with HF regardless of ejection fraction. Further work is needed to determine if correction of hyponatraemia translates into clinical benefit.

Comment in

PMID:
22782968
[PubMed - indexed for MEDLINE]
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