Abbreviations
IMA: left internal mammary artery; CABG: coronary artery bypass
grafting; ACCF/AHA: American College of Cardiology Foundation/American
Heart Association; PSV: peak systolic velocity; PDV: peak diastolic
velocity; sVTI: systolic velocity–time integral; dVTI: diastolic
velocity–time integral; RI: resistance index; dVTIF: diastolic
velocity–time integral fraction; D/S: peak systolic velocity/peak
diastolic velocity.