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Related Concept Videos

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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
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Hyperdynamic Left Ventricular Ejection Fraction in ICU Patients With Sepsis.

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Hyperdynamic left ventricular ejection fraction in sepsis patients is linked to higher mortality, potentially due to unmitigated vasoplegia. Depressed ejection fraction, however, was not associated with mortality but with cardiovascular disease.

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Area of Science:

  • Critical Care Medicine
  • Cardiology
  • Infectious Diseases

Background:

  • Sepsis can lead to significant cardiac dysfunction.
  • Left ventricular ejection fraction (LVEF) is a key indicator of cardiac performance.
  • The prognostic implications of different LVEF phenotypes in sepsis require further elucidation.

Purpose of the Study:

  • To investigate the association between hyperdynamic left ventricular ejection fraction (LVEF > 70%) and mortality in critically ill patients with sepsis.
  • To explore the relationship between LVEF phenotypes (normal, depressed, hyperdynamic) and clinical variables in septic patients.

Main Methods:

  • Retrospective, single-center cohort study of ICU patients with sepsis.
  • Transthoracic echocardiograms were analyzed within 7 days of sepsis diagnosis.
  • Comparison of 90-day mortality rates across LVEF groups (normal: 55-70%, depressed: <55%, hyperdynamic: >70%).
  • Multivariate logistic regression was used to identify independent predictors of mortality and LVEF phenotypes.

Main Results:

  • A total of 1014 patients were included, with a 90-day mortality rate of 32.1%.
  • Hyperdynamic LVEF was significantly associated with higher 90-day mortality (58.9%) compared to normal (24.7%) and depressed (34.0%) LVEF.
  • Hyperdynamic LVEF independently predicted mortality (OR, 3.90), while depressed LVEF did not.
  • Lower systemic vascular resistance was linked to hyperdynamic LVEF, whereas age, frailty, and ischemic heart disease were associated with depressed LVEF.

Conclusions:

  • Hyperdynamic LVEF in septic ICU patients is an independent predictor of mortality.
  • This finding may indicate persistent vasoplegia in sepsis.
  • Depressed LVEF was not associated with mortality but was linked to pre-existing cardiovascular conditions.