Ivabradine Attenuates the Microcirculatory Derangements Evoked by Experimental Sepsis

Marcos L. Miranda*, Michelle M. Balarini, Daniela S. Balthazar, Lorena S. Paes, Maria Carolina S. Santos, Eliete Bouskela

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


BACKGROUND: Experimental data suggest that ivabradine, an inhibitor of the pacemaker current in sinoatrial node, exerts beneficial effects on endothelial cell function, but it is unclear if this drug could prevent microcirculatory dysfunction in septic subjects, improving tissue perfusion and reducing organ failure. Therefore, this study was designed to characterize the microcirculatory effects of ivabradine on a murine model of abdominal sepsis using intravital videomicroscopy.

METHODS: Twenty-eight golden Syrian hamsters were allocated in four groups: sham-operated animals, nontreated septic animals, septic animals treated with saline, and septic animals treated with ivabradine (2.0 mg/kg intravenous bolus + 0.5 mg · kg · h). The primary endpoint was the effect of ivabradine on the microcirculation of skinfold chamber preparations, assessed by changes in microvascular reactivity and rheologic variables, and the secondary endpoint was its effects on organ function, evaluated by differences in arterial blood pressure, motor activity score, arterial blood gases, and hematologic and biochemical parameters among groups.

RESULTS: Compared with septic animals treated with saline, those treated with ivabradine had greater functional capillary density (90 ± 4% of baseline values vs. 71 ± 16%; P < 0.001), erythrocyte velocity in capillaries (87 ± 11% of baseline values vs. 62 ± 14%; P < 0.001), and arteriolar diameter (99 ± 4% of baseline values vs. 91 ± 7%; P = 0.041) at the end of the experiment. Besides that, ivabradine-treated animals had less renal, hepatic, and neurologic dysfunction.

CONCLUSIONS: Ivabradine was effective in reducing microvascular derangements evoked by experimental sepsis, which was accompanied by less organ dysfunction. These results suggest that ivabradine yields beneficial effects on the microcirculation of septic animals.

Original languageEnglish
Pages (from-to)140-149
Number of pages10
Issue number1
Publication statusPublished - Jan 2017

Bibliographical note

Publisher Copyright:
© 2016 the American Society of Anesthesiologists, Inc. Wolters Kluwer Health, Inc. All Rights Reserved.


  • Animals
  • Benzazepines/pharmacology
  • Cardiovascular Agents/pharmacology
  • Cricetinae
  • Disease Models, Animal
  • Ivabradine
  • Male
  • Mesocricetus
  • Microcirculation/drug effects
  • Sepsis/physiopathology


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