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Related Experiment Video

Updated: Oct 5, 2025

Functional Assessment of the Donor Heart During Ex Situ Perfusion: Insights from Pressure-Volume Loops and Surface Echocardiography
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Optimizing left ventricular-arterial coupling during the initial resuscitation in septic shock - a pilot prospective

Xiaoyang Zhou1,2, Yiqin Zhang3, Jianneng Pan1,2

  • 1Department of Intensive Care Medicine, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, 315000, Zhejiang, China.

BMC Anesthesiology
|January 22, 2022
PubMed
Summary

Optimizing left ventricular-arterial coupling (VAC) in septic shock patients improved lactate clearance and showed potential for better survival. This algorithm-based resuscitation strategy aims to reduce the Ea/Ees ratio for improved cardiovascular work efficacy.

Keywords:
Cardiac stroke workPrognosisResuscitationSeptic shockVentricular-arterial coupling

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Area of Science:

  • Cardiovascular Physiology
  • Critical Care Medicine
  • Hemodynamics

Background:

  • Left ventricular-arterial coupling (VAC) is crucial for cardiovascular efficiency.
  • Left ventricular-arterial uncoupling is linked to poor outcomes in shock patients.
  • Septic shock management requires effective resuscitation strategies.

Purpose of the Study:

  • To evaluate if an algorithm-based resuscitation optimizing left ventricular-arterial coupling improves prognosis in septic shock.
  • To assess the impact of reducing the Ea/Ees ratio on patient outcomes.
  • To investigate the effect of VAC optimization on lactate clearance and mortality.

Main Methods:

  • Pilot study in an ICU involving 83 septic shock patients with left ventricular-arterial uncoupling.
  • Random assignment to usual care or an algorithm-based resuscitation targeting an Ea/Ees ratio of 1 within 6 hours.
  • Transthoracic echocardiography used to monitor left VAC every 2 hours.

Main Results:

  • The VAC-optimized group showed a significantly greater reduction in the Ea/Ees ratio compared to the usual care group.
  • The VAC-optimized group demonstrated a trend towards reduced 28-day mortality (33% vs. 50%).
  • Lactate clearance rate was significantly higher in the VAC-optimized group (P=0.038).

Conclusions:

  • Optimizing left ventricular-arterial coupling during initial septic shock resuscitation is associated with improved lactate clearance.
  • This strategy may offer a beneficial effect on patient prognosis.
  • Further research is warranted to confirm these findings in larger trials.