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Related Experiment Videos

Post-reperfusion function evaluated using two-dimensional echocardiography in dog: systolic/diastolic function vs

Y Fujibayashi1, R V Haendchen, T Uchiyama

  • 1Second Department of Internal Medicine, Surugadai Nihon University School of Medicine, Surugadai Nihon University Hospital, Tokyo.

Journal of Cardiography
|December 1, 1986
PubMed
Summary

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Mean velocity of segmental luminal area change (Seg-VLAC) effectively predicts left ventricular function recovery after coronary artery occlusion. Seg-VLAC also estimates myocardial necrosis extent seven days post-reperfusion.

Area of Science:

  • Cardiovascular Research
  • Echocardiography
  • Myocardial Infarction

Background:

  • Assessing regional left ventricular function post-myocardial infarction is crucial for predicting outcomes.
  • Traditional methods for evaluating myocardial damage can be invasive or lack real-time assessment capabilities.

Purpose of the Study:

  • To investigate the predictive value of two-dimensional echocardiography (2DE) parameters for regional left ventricular function recovery and myocardial necrosis.
  • To compare systolic and diastolic function parameters in predicting infarct severity and recovery.

Main Methods:

  • Nine dogs underwent 3-hour LAD occlusion followed by 7-day reperfusion.
  • 2DE was used to measure percent segmental fractional area change (Seg-FAC%) and mean velocity of segmental luminal area change (Seg-VLAC).

Related Experiment Videos

  • Triphenyl-tetrazolium-chloride staining assessed mural necrosis (N%) in myocardial segments.

    • Main Results:

    • Seg-VLAC showed significant differences between groups with >=40% necrosis (Group A) and <40% necrosis (Group B) at 3 hours and 7 days post-reperfusion.
    • Seg-VLAC correlated strongly and negatively with N% (r=-0.94) at 7 days post-reperfusion.
    • Seg-FAC% did not significantly correlate with N% (r=-0.58) at 7 days post-reperfusion.

    Conclusions:

    • Seg-VLAC measured after 3 hours of occlusion predicts 7-day recovery of regional left ventricular function.
    • Seg-VLAC at 7 days post-reperfusion estimates the regional transmural extent of myocardial necrosis.