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Publisher: American Heart Association
Languages: English
Types: Article
Subjects: R1
Background—Chloride plays a role in renal salt sensing, neurohormonal activation, and regulation of diuretic targets, and hypochloremia predicts mortality in acute heart failure (AHF). AHF therapies, such as diuretics, alter chloride homeostasis. We studied the association between (changes in) chloride levels and diuretic responsiveness, decongestion, and mortality in patients with AHF.\ud \ud Methods and Results—Patients hospitalized for AHF in the PROTECT trial (n=2033) with serum chloride levels within 24 hours of admission and 14 days later were studied (n=1960). Hypochloremia was defined as serum chloride <96 mEq/L. Mean baseline chloride was 100.8±5.0 mEq/L. Low baseline chloride was associated with high bicarbonate, poor diuretic response, less hemoconcentration, and worsening heart failure (all P<0.01). Newly developed hypochloremia at day 14 was common and associated with a decline in renal function and an increase in blood urea nitrogen (P<0.01). In multivariable analyses, chloride measured at day 14, but not baseline chloride, was strongly and independently associated with mortality through 180 days (hazard ratio per unit decrease: 1.07 [1.03–1.10]; P<0.001). In comparison, sodium was not significantly associated with mortality after multivariable adjustment at any time point. Hypochloremia at baseline that resolved was not associated with mortality (P=0.55), but new or persistent hypochloremia at day 14 was associated with increased mortality (hazard ratio: 3.11 [2.17–4.46]; P<0.001).\ud \ud Conclusions—Low serum chloride at AHF hospital admission was strongly associated with impaired decongestion. New or persistent hypochloremia 14 days later was independently associated with reduced survival, whereas hypochloremia that resolved by day 14 was not.\ud \ud Clinical Trial Registration—URL: http://www.clinicaltrials.gov. Unique identifier: NCT00354458.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • 7. Piala AT, Moon TM, Akella R, He H, Cobb MH, Goldsmith EJ. Chloride sensing by WNK1 involves inhibition of autophosphorylation. Sci Signal 2014;7:ra41.
    • 9. Grodin JL, Simon J, Hachamovitch R, et al. Prognostic Role of Serum Chloride Levels in Acute Decompensated Heart Failure. J Am Coll Cardiol 2015;66:659-66.
    • 10. Testani JM, Simon J, Arroyo JP, et al. Hypochloremia is strongly and independently associated with moratlity in patients with chronic heart failure. European journal of heart failure Submitted.
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