Key result
Low second-hour spot urinary sodium linked to ~14.4-fold higher odds of inadequate natriuretic response.
Why the study?
In acute decompensated heart failure, the natriuretic response to hypertonic saline solution combined with high dose loop diuretics is markedly heterogeneous. Early identification of patients at risk for inadequate response is needed for timely therapeutic optimization.
Does a multiparametric risk stratification strategy integrating tubular, hemodynamic, and functional markers predict inadequate natriuretic response to hypertonic saline supported diuretics in hospitalized patients with acute decompensated heart failure?
Observational (n=77)
Does a multiparametric risk stratification strategy integrating tubular, hemodynamic, and functional markers predict inadequate natriuretic response to hypertonic saline supported diuretics in hospitalized patients with acute decompensated heart failure?
In acute decompensated heart failure treated with hypertonic saline-supported loop diuretics, a multiparametric assessment incorporating serum NGAL, baseline serum sodium, 2-hour spot urinary sodium, and lung disease strongly predicts inadequate 24-hour natriuretic response.
Answers are grounded in this paper and cite their sources.
May aid cautious risk stratification in acute decompensated heart failure; leaves open whether these markers guide interventions in randomized trials.
Background In acute decompensated heart failure, hypertonic saline solution combined with high dose loop diuretics is used to enhance decongestion by preserving intravascular volume and improving renal perfusion. However, the natriuretic response remains markedly heterogeneous. Early identification of patients at risk for inadequate response is crucial for timely therapeutic optimization. Purpose To evaluate a comprehensive multiparametric risk stratification strategy integrating tubular, hemodynamic and functional markers to predict inadequate natriuretic response to hypertonic saline supported diuretics. Methods This prospective observational study included 79 hospitalized patients treated with a standardized protocol of hypertonic saline solution combined with high dose intravenous loop diuretics. Inadequate response was defined as cumulative urinary sodium excretion <105 mEq within 24 hours (final n=77). Clinical characteristics, serum neutrophil gelatinase associated lipocalin and electrolytes, second hour spot urinary sodium, and advanced echocardiographic markers of right heart function and systemic venous congestion including right ventricular outflow tract velocity-time integral, inferior vena cava diameter, estimated right atrial pressure and venous excess ultrasound score were analyzed. Independent predictors were identified using multivariable logistic regression. Results Among 77 patients (mean age 70.3±10.8 years, 57% male), 37 (48.1%) demonstrated inadequate natriuretic response. Non-responders exhibited lower baseline serum sodium and chloride (both p<0.001), higher neutrophil gelatinase associated lipocalin levels (p=0.004), larger inferior vena cava diameters (p=0.010), higher right atrial pressure (p<0.001), and lower right ventricular outflow tract velocity-time integral (p=0.012). A second hour spot urinary sodium <70 mEq/L was strongly associated with inadequate response (p<0.001). In multivariable analysis, neutrophil gelatinase associated lipocalin ≥10 ng/mL (OR 4.16, p=0.025), serum sodium <135 mmol/L (OR 6.45, p=0.004), second hour spot urinary sodium <70 mEq/L (OR 14.36, p<0.001), and concomitant lung disease (OR 11.45, p=0.002) independently predicted inadequate response. Conclusion In acute decompensated heart failure treated with hypertonic saline supported diuretics, inadequate natriuretic response defines a distinct cardiorenal high-risk phenotype characterized by tubular stress, hyponatremia and severe right-sided venous congestion. Conventional congestion biomarkers alone failed to discriminate responders, whereas early functional sodium handling provided strong independent prognostic discrimination. A multiparametric strategy integrating tubular injury, right heart hemodynamics and early spot urinary sodium may refine early clinical decision-making and identify patients requiring prompt therapeutic escalation beyond conventional diuretic strategies.Figure1_Integrated_Risk_Model_AHF.pngFig2_Independent_Predictors_FP.png
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Yilmaz et al. (2026) conducted an observational in Acute decompensated heart failure (n=77). Second hour spot urinary sodium <70 mEq/L (within a multiparametric risk stratification model) vs. Adequate natriuretic responders (cumulative 24-hour urinary sodium excretion >=105 mEq) was evaluated on Inadequate natriuretic response (cumulative urinary sodium excretion <105 mEq within 24 hours) (OR 14.36, p=<0.001). Second-hour spot urinary sodium <70 mEq/L (OR 14.36, p<0.001), hyponatremia (OR 6.45), and NGAL >=10 ng/mL (OR 4.16) independently predicted inadequate natriuretic response (48.1% overall).
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