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SYNTAX score affects LIMA graft flow dynamics in coronary artery bypass surgery
Gökhan Arslanhan1, Müge Evren Taşdemir Mete1, Murat Sargın1
1Department of Cardiovascular Surgery, University of Health Sciences Türkiye, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Türkiye.
Turk Gogus Kalp Damar Cerrahisi Dergisi
|January 13, 2026
Summary
SYNTAX scores correlate with intraoperative graft flow in coronary artery bypass grafting (CABG). Higher SYNTAX scores may indicate lower mean graft flow in left internal mammary artery to left anterior descending artery grafts.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
- Medical Imaging & Technology
Background:
- Intraoperative transit time flow (TTF) is crucial for assessing graft patency and anastomotic quality in coronary artery bypass grafting (CABG).
- Limited data exist on the relationship between SYNTAX scores and intraoperative graft flow dynamics.
Purpose of the Study:
- To evaluate the predictive value of SYNTAX scores for intraoperative graft flow parameters.
- To assess TTF measurements of the left internal mammary artery (LIMA) grafted to the left anterior descending (LAD) artery in relation to SYNTAX scores.
Main Methods:
- Prospective evaluation of patients undergoing CABG for critical LAD disease.
- Calculation of SYNTAX score, SYNTAX II score, and LAD-SYNTAX.
- Analysis of correlations between these scores and TTF parameters (mean graft flow, diastolic flow, pulsatility index).
Main Results:
- SYNTAX score showed non-significant correlations with MGF, DF, and PI.
- SYNTAX II score demonstrated a significant negative correlation with DF (p=0.037).
- LAD-SYNTAX showed a statistically significant negative correlation with MGF (r=-0.288, p=0.012).
Conclusions:
- SYNTAX scores are associated with intraoperative TTF measurements of LIMA-LAD grafts.
- Atherosclerotic burden of the target vessel and patient-specific factors may influence LIMA graft flow dynamics during CABG.
