Key result
Coronary artery bypass grafting using the Y-graft technique resulted in a significantly higher systolic acceleration time and shorter diastolic acceleration time compared to conventional LITA-LAD grafting.
Why the study?
The study aimed to evaluate transthoracic Doppler flow parameters of the LITA stem after CABG using a free right internal thoracic artery Y-graft technique compared with regular LITA-LAD CABG.
Does CABG with free right internal thoracic artery using Y graft technique alter LITA graft flow parameters compared to regular CABG in patients with coronary artery disease?
Observational (n=51)
Does CABG with free right internal thoracic artery using Y graft technique alter LITA graft flow parameters compared to regular CABG in patients with coronary artery disease?
Blood flow volume in the LITA graft depends on distal run-off and increases when revascularizing more than one coronary artery using a Y graft technique.
Y-graft flow changes may affect LITA performance; leaves open impact on patency and outcomes versus conventional grafting.
Purpose — The aim of our study is to assess the transthoracic Doppler parameters of left internal thoracic artery`s stem (LITA) flow after coronary artery bypass surgery with free right internal thoracic artery using Y graft technique and compare them with such parameters of LITA‐LAD (left anterior descending) graft flow after regular coronary artery bypass surgery (CABG). Material and Methods — 51 consecutive patients with coronary artery disease underwent CABG. Comparison between groups was performed using the following parameters: age, body mass index, angina class, presence of hypertension and diabetes, left ventricular ejection fraction and haemoglobin level, hemodynamic parameters during the Doppler investigation. Results — Higher systolic acceleration time value in Y graft group is due to bigger runoff of Y graft compared with the classic group. The diastolic acceleration time is shorter in Y graft group as the distal coronary runoff is bigger and LITA`s peak flow accelerates faster. The systolic and diastolic acceleration times are very sensitive parameters which depend on the distal coronary runoff changes. Conclusions — We conclude that blood flow volume in tha LITA graft depend of coronary artery distal run‐off and rising when we using to revascularize more than one coronary artery.
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Tigran Akobyan (2023) conducted an observational in Coronary artery disease (n=51). Y-graft technique (bilateral internal thoracic arteries) vs. Conventional LITA-LAD graft was evaluated on Systolic and diastolic flow acceleration times measured by transthoracic Doppler. Coronary artery bypass grafting using the Y-graft technique resulted in a significantly higher systolic acceleration time and shorter diastolic acceleration time compared to conventional LITA-LAD grafting.
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