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In vitro cardiac function in early sepsis.

K H McDonough1, E C Burke, L W Smith

  • 1Department of Physiology, Louisiana State University Medical Center, New Orleans.

Journal of Medicine
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Early sepsis involves myocardial contractile defects, challenging previous views. Calcium dysregulation contributes to cardiac dysfunction, even when cardiac output remains normal.

Area of Science:

  • Cardiology
  • Sepsis Pathophysiology
  • Myocardial Function

Background:

  • The role of the myocardium in sepsis-induced injury remains debated.
  • Some suggest cardiac dysfunction marks the transition to late-stage sepsis.
  • This study investigates myocardial changes in early sepsis.

Purpose of the Study:

  • To determine if cardiac dysfunction occurs early in sepsis.
  • To elucidate the mechanisms underlying sepsis-induced cardiac dysfunction.
  • To assess the role of calcium in myocardial impairment during sepsis.

Main Methods:

  • Studied whole heart performance under varying calcium availability.
  • Assessed subcellular organelle function in septic models.
  • Evaluated myocardial contractile function in early sepsis.

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Main Results:

  • Contractile defects and loss of myocardial reserve were observed early in sepsis.
  • Elevated or normal cardiac output did not preclude early myocardial dysfunction.
  • Calcium dyshomeostasis was implicated in sepsis-related cardiac dysfunction.

Conclusions:

  • Myocardial dysfunction occurs earlier in sepsis than previously thought.
  • Calcium dysregulation is a potential contributor to sepsis-induced cardiac issues.
  • The heart's response to catecholamines may sustain function in early sepsis.