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Effect of coronary artery bypass surgery on left ventricular function as assessed by strain and strain rate imaging

T Durmaz1, H Bayram2, Na Bayram1

  • 1Department of Cardiology, Ataturk Education and Research Hospital, Ankara, Turkey.

Perfusion
|December 6, 2013
PubMed

Insights

Strain and strain rate echocardiography accurately evaluate left ventricular function after coronary artery bypass graft (CABG) surgery. This imaging technique detects improvements in regional contractile function, even in seemingly normal segments, following CABG.

Area of Science:

  • Cardiology
  • Echocardiography
  • Cardiac Surgery

Background:

  • Coronary artery disease (CAD) significantly impacts left ventricular function.
  • Coronary artery bypass graft (CABG) surgery aims to restore blood flow and improve cardiac function.
  • Assessing regional myocardial function post-CABG is crucial for patient outcomes.

Purpose of the Study:

  • To evaluate the effectiveness of strain and strain rate echocardiography in assessing left ventricular function after CABG.
  • To detect changes in regional contractile function before and after revascularization.
  • To determine if strain imaging can identify functional improvements in all myocardial segments.

Main Methods:

  • Prospective study of 68 patients with coronary artery disease.
  • Conventional echocardiography and color tissue Doppler-derived strain-strain rate imaging were utilized.
  • Imaging was performed 24 hours before and 3 months after CABG surgery.

Main Results:

  • Significant increases in strain rate were observed in multiple left ventricular segments, including the septum, lateral, inferior, and anterior walls.
  • Mean systolic strain rate and mean systolic strain values significantly increased post-CABG.
  • Improvements in regional contractile function were detected by strain and strain rate echocardiography.

Conclusions:

  • Strain and strain rate echocardiography offer accurate assessment of regional contractile function post-CABG.
  • These echocardiographic techniques can identify functional improvements even in myocardial segments that appear normal.
  • Strain imaging is a valuable tool for evaluating the success of revascularization in CAD patients.
Abstract

Keywords:
Doppler echocardiographycoronary artery bypass graftingleft ventricleoff-pump coronary artery bypassventricular function

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