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Related Experiment Videos

Differences in LIMA Doppler characteristics for different LAD perfusion areas.

J M Hartman1, J C Kelder, R G Ackerstaff

  • 1Department of Cardiothoracic Surgery, University Hospital Rotterdam, Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands. jmhartman88@hotmail.com

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|November 22, 2001
PubMed
Summary

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Doppler ultrasound of the internal mammary artery (IMA) to the left anterior descending artery (LAD) graft can predict the revascularized area. Maximal diastolic peak velocity during hyperemia is the strongest predictor of graft run-off.

Area of Science:

  • Cardiovascular Surgery
  • Medical Imaging
  • Vascular Ultrasound

Background:

  • Coronary artery bypass grafting (CABG) using the internal mammary artery (IMA) is a gold standard for revascularization.
  • Assessing graft perfusion is crucial for long-term outcomes.
  • Non-invasive methods to evaluate graft patency and perfusion are highly desirable.

Purpose of the Study:

  • To correlate supraclavicular Doppler ultrasound characteristics of the left internal mammary artery (LIMA) graft with the angiographically determined perfused area in the left anterior descending artery (LAD) territory.
  • To identify Doppler parameters that best predict graft perfusion.

Main Methods:

  • Prospective study of 60 patients undergoing LIMA-to-LAD grafting.
  • Supraclavicular echo Doppler assessment of LIMA at baseline and follow-up (4.8 months and 1.8 years).

Related Experiment Videos

  • Angiography at 1.5 years to assess native and LIMA graft perfusion, categorized into three groups based on perfused area percentage. Multivariate linear regression analysis (MLRA) used to correlate Doppler variables with perfused area.

    • Main Results:

    • MLRA revealed significant correlations between perfused area and diastolic peak velocity (DPV) and diastolic mean velocity at rest.
    • Maximal DPV during hyperemia showed a significant correlation with the perfused area and the ratio of perfused to target area.
    • DPV max was the strongest predictor of LIMA graft run-off area.

    Conclusions:

    • Diastolic flow patterns at rest and maximal DPV in hyperemic response are significant predictors of LIMA graft run-off.
    • Maximal DPV during hyperemia is the strongest predictor of the LIMA graft's perfused area.