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Related Experiment Videos

Right ventricular long-axis function in relation to left ventricular systolic function.

Kent Emilsson1

  • 1Department of Clinical Physiology, Karlskoga Hospital, SE-691 81 Karlskoga, Sweden. kent.emilsson@orebroll.se

Clinical Physiology and Functional Imaging
|July 6, 2004
PubMed
Summary

Reduced left ventricular systolic function is linked to impaired right ventricular long-axis function, affecting both systolic and diastolic measures. This suggests a connection between ventricular mechanics and RV afterload changes due to LV dysfunction.

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Area of Science:

  • Cardiology
  • Echocardiography
  • Ventricular Mechanics

Background:

  • Left ventricular (LV) systolic dysfunction is associated with reduced LV relaxation velocity.
  • The impact on right ventricular (RV) long-axis function remains less understood.

Purpose of the Study:

  • To investigate if decreased LV systolic function correlates with diminished RV long-axis systolic and diastolic function.
  • To explore the relationship between LV and RV longitudinal function.

Main Methods:

  • Echocardiography was performed on 35 consecutive patients.
  • Left ventricular ejection fraction (LVEF) and mitral annulus motion (MAM) assessed LV function.
  • Tricuspid annulus motion (TAM) and maximal diastolic velocity of TAM (MDV TAM) assessed RV function.

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Main Results:

  • Significant positive correlations were observed between MDV TAM and MAM (r=0.64) and LVEF (r=0.54).
  • TAM also showed significant positive correlations with MAM (r=0.68) and LVEF (r=0.57).
  • These findings indicate that reduced LV systolic function is accompanied by decreased RV systolic and diastolic long-axis function.

Conclusions:

  • A decrease in LV systolic function is associated with impaired RV long-axis function.
  • These changes are likely influenced by the close anatomical relationship between ventricles and RV afterload alterations secondary to LV dysfunction.