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November 17, 2019BMC AnesthesiologyOpen Access

Preservation of renal function in cardiac surgery patients with low cardiac output syndrome: levosimendan vs beta agonists

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Key result

Postoperative administration of levosimendan decreased the incidence of kidney failure at ICU discharge to 0% compared to 40% with beta-agonists in cardiac surgery patients with low cardiac output syndrome.

Why the study?

Levosimendan treats low cardiac output syndrome after cardiac surgery and seems to protect renal function, but its effects on postoperative kidney failure compared to beta-agonists needed assessment.

Does levosimendan reduce postoperative kidney failure in cardiac surgery patients with low cardiac output syndrome compared to beta-agonists?

Population

100 cardiac surgery patients with LCOS

Comparison

Levosimendan vs beta-agonists

Design

Quasi-experimental study

Authors

JOJosé Luis Guerrero OrriachVictoria School of ManagementIAIsabel Navarro ArceHospital Clínico Universitario Virgen de la VictoriaPRPrado RodríguezCentro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas

Discussion

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Member takes

Implication

May support levosimendan over beta-agonists to avert kidney failure in low-output cardiac surgery; leaves open need for RCT confirmation.

Study Design

Type

Observational (n=100)

Multicenter

No

Structured PICO

Does levosimendan reduce postoperative kidney failure in cardiac surgery patients with low cardiac output syndrome compared to beta-agonists?

P
Population
100 adult patients who developed postoperative low cardiac output syndrome following heart surgery, treated with either levosimendan or beta-agonists and followed until ICU discharge.
I
Intervention
Levosimendan administered for 24 hours at a rate of 0.1 mcg/kg/min to a target dose of 12.5 mg.
C
Comparator
Beta-agonists (adrenaline or dobutamine, with noradrenaline added when necessary) maintained until LCOS resolution.
O
Outcome
Incidence of postoperative kidney failure (assessed by the AKI scale) at discharge from the Intensive Care Unit (ICU).surrogate

Main Result

Absolute Event Rate: 0% vs 40%

p-value: p=<0.05

In cardiac surgery patients with low cardiac output syndrome, levosimendan administration was associated with a lower incidence of postoperative kidney failure compared to standard beta-agonist therapy.

Limitations

  • Patients were not randomized to treatment groups, introducing potential selection bias.
  • Physicians may have favored conventional therapy, causing bias in the interpretation of results.
  • A triple-blinded study was not possible due to the study design.
  • Lack of biochemical parameters with greater sensitivity and specificity (e.g., N-GAL or Cystatin C) to evaluate renal action.
  • Patients were not randomized to treatment groups, which may have caused bias as physicians might favor conventional therapy.
  • Sample size was not calculated for secondary endpoints like ICU length of stay.

Cite This Study

Orriach et al. (2019) conducted an observational in Low cardiac output syndrome (LCOS) following heart surgery (n=100). Levosimendan vs. Beta-agonists (adrenaline or dobutamine) was evaluated on Incidence of kidney failure at ICU discharge among patients with renal dysfunction at LCOS diagnosis (p=<0.05). Postoperative administration of levosimendan decreased the incidence of kidney failure at ICU discharge to 0% compared to 40% with beta-agonists in cardiac surgery patients with low cardiac output syndrome.

synapsesocial.com/papers/6a9afcc80f8df4b884d15eb6https://doi.org/10.1186/s12871-019-0888-2
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Early administration of levosimendan is associated with improved kidney function after cardiac surgery – a retrospective analysis2014 · 17 citations
  2. 2Effects of Levosimendan on Glomerular Filtration Rate, Renal Blood Flow, and Renal Oxygenation After Cardiac Surgery With Cardiopulmonary Bypass2013 · 97 citations
  3. 3Levosimendan Improves Renal Function in Acute Decompensated Heart Failure: Possible Underlying Mechanisms2013 · 71 citations
  4. 4Rationale and design of the multicenter randomized trial investigating the effects of levosimendan pretreatment in patients with low ejection fraction (≤40 %) undergoing CABG with cardiopulmonary bypass (LICORN study)2016 · 13 citations
  5. 5Cardiac, renal, and neurological benefits of preoperative levosimendan administration in patients with right ventricular dysfunction and pulmonary hypertension undergoing cardiac surgery: evaluation with two biomarkers neutrophil gelatinase-associated lipocalin and neuronal enolase2016 · 28 citations