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A practical approach to sequential nephron blockade in acute decompensated heart failure Cover

A practical approach to sequential nephron blockade in acute decompensated heart failure

Open Access
|Sep 2023

Figures & Tables

Combined diuretic strategies to overcome anticipated adverse events_

Class of medicationAnticipated electrolyte or acid-base disturbancesAdd-on diuretic agents to counteract the anticipated primary adverse event
Thiazide diuretics Loop diureticsHyponatremiaSGLT2i Vasopressin receptor antagonists
Thiazide diuretics Loop diureticsHypokalemiaMRAs
RAASi MRAs ENaC blockersHyperkalemiaSGLT2i Loop or thiazide diuretics
Thiazide diuretics Loop diureticsMetabolic alkalosisCA inhibitors MRAs
CA inhibitors MRAsMetabolic acidosisThiazide diuretics Loop diuretics
Thiazide diuretics Loop diureticsHypomagnesemiaMRAs ENaC blockers
CA inhibitors Loop diureticsHypocalcemiaThiazide diuretics ENaC blockers

Trials evaluating sequential nephron blockade_

Site of additional blockadeTrialBackground diureticsAdditional comparator agent versus placeboPrimary endpointResultsAdditional findings
Proximal nephron blockadeEMPA-RESPONSE-AHF [62]Loop diureticsEmpagliflozin (10 mg)
  • -

    Change in dyspnea

  • -

    Diuretic response

  • -

    Change in NT-proBNP

  • -

    Length of stay

  • -

    No difference in any of the primary endpoint events

  • -

    Lower incidence of a combined endpoint of inhospital worsening of HF, rehospitalization for HF and mortality at 60 days.

  • -

    Greater urinary output with empagliflozin

EMPAG-HF [63]Loop diureticsEmpagliflozin (25 mg)
  • -

    Cumulative urinary output over 5 days

  • -

    25% increase in cumulative urine output over 5 days

  • -

    Empagliflozin increased diuretic efficiency compared with placebo, with more pronounced decrease in NT-proBNP

EMPULSE [64]Loop diureticsEmpagliflozin (10 mg)
  • -

    Weight loss

  • -

    Weight loss adjusted per mean daily loop diuretic dose

  • -

    Change in NT-proBNP

  • -

    Hemoconcentration

  • -

    Clinical congestion score

  • -

    Empagliflozin demonstrated significantly greater reductions in all studied markers of decongestion at all time-points

  • -

    Greater weight loss at Day 15 was associated with significantly higher probability for clinical benefit at Day 90 (composite endpoint of all-cause death, heart failure events, and a 5- point or greater difference in Kansas City Cardiomyopathy Questionnaire total symptom score change from baseline to 90 days)

DIURESIS-CHF [71]Loop diureticsAcetazolamide
  • -

    Natriuresis after 24 h

  • -

    Natriuresis after 24 h was similar in the combinational treatment vs. loop diuretic only arm

  • -

    Loop diuretic efficiency, defined as natriuresis corrected for loop diuretic dose, was higher in the group receiving acetazolamide

ADVOR [22]Loop diureticsAcetazolamide
  • -

    Successful decongestion, defined as the absence of signs of volume overload, within 3 days after randomization and without an indication for escalation of decongestive therapy

  • -

    Patients with acetazolamide add-on achieved more frequently successful decongestion both within 3 days after randomization (42.2% vs. 30.5%) and at discharge (78.8% vs. 62.5%).

  • -

    Acetazolamide led to a greater urinary output and natriuresis

  • -

    Acetazolamide did not decrease the risk of death or rehospitalization for HF

Distal nephron blockadeCLOROTIC [79]Loop diureticsHydrochlorothiazide
  • -

    Change in dyspnea

  • -

    Change in body weight

  • -

    Patients assigned to HCTZ were more likely to lose weight at 72 h than those assigned to placebo, but there were no significant differences in patient-reported dyspnea

  • -

    Patients allocated to HCTZ showed greater 24-h diuresis and weight loss for each 40 mg of furosemide

  • -

    There were no differences in mortality or rehospitalizations

ATHENA-HF [83]Standard therapy that may include low-dose spironolactone (12.5 or 25 mg)Spironolactone 100 mg
  • -

    Change in NT-proBNP levels from baseline to 96 hours

  • -

    No significant difference in the log NT-proBNP reduction between the 2 groups

  • -

    No significant change in clinical congestion score, dyspnea assessment, urinary output, weight change, mortality or rehospitalization for HF.

EVEREST [84]Standard therapyTolvaptan
  • -

    All-cause mortality

  • -

    Cardiovascular death or hospitalization for HF

  • -

    Tolvaptan had no effect on long-term mortality or heart failure–related morbidity

  • -

    Tolvaptan improved day 1 patient-assessed dyspnea, day 1 body weight, day 7 edema.

Distal nephron blockadeTACTICS-HF [55]Loop diureticsTolvaptan
  • -

    Proportion of patients with at least moderate improvement in dyspnea by 7-point Likert scale at both 8 and 24 h, without death or need for rescue therapy within 24 h (defined as responders)

  • -

    The proportion defined as responders at 24 h (primary study endpoint) was 16% for tolvaptan and 20% for placebo (p = 0.32).

  • -

    Tolvaptan addition resulted in greater weight loss and net fluid loss compared with placebo

SECRET of CHF [56]Loop diureticsTolvaptan
  • -

    7-point change in self-assessed dyspnea at 8 and 16 h

  • -

    No difference in the primary endpoint of day 1 dyspnea reduction

  • -

    Tolvaptan led to a significantly greater weight loss and dyspnea reduction at day 3.

DOI: https://doi.org/10.2478/rjc-2023-0021 | Journal eISSN: 2734-6382 | Journal ISSN: 1220-658X
Language: English
Page range: 83 - 92
Published on: Sep 21, 2023
Published by: Romanian Society of Cardiology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2023 Georgiana-Valentina Frățilă, Bogdan Obrişcă, Gener Ismail, published by Romanian Society of Cardiology
This work is licensed under the Creative Commons Attribution 4.0 License.