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A mathematical model to evaluate hemodynamic effects of the graft anastomosis in coronary surgery

Giovanni Ruvolo1, Calogera Pisano1, Fabio Bertoldo1

  • 1Department of Cardiac Surgery, Tor Vergata University Hospital, Rome, Italy.

Kardiochirurgia I Torakochirurgia Polska = Polish Journal of Cardio-Thoracic Surgery
|August 15, 2019
PubMed

Insights

Optimizing coronary artery bypass grafting (CABG) involves precise surgical techniques. A mathematical model suggests a 30° anastomotic angle and perfect vessel alignment minimize graft occlusion and improve patient prognosis.

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Fluid Dynamics

Background:

  • Coronary artery bypass grafting (CABG) outcomes depend on graft durability and patency.
  • Technical factors like anastomotic angle and vessel alignment can lead to graft thrombosis and poor patient prognosis.

Purpose of the Study:

  • To assess the optimal anastomotic angle for coronary grafts using a mathematical model.
  • To evaluate the impact of vessel alignment on preventing early graft occlusion.

Main Methods:

  • Development and analysis of a mathematical model simulating blood flow in coronary anastomoses.
  • Simulation of various inclination angles and axial deviations at the anastomosis site.

Main Results:

  • A minimum anastomotic inclination angle of 30° is recommended for coronary artery bypass grafts.
  • Axial deviations as small as 10° can induce flow turbulence, with significant accentuation at 20°.

Conclusions:

  • Optimal anastomotic angulation and precise axial alignment are critical for preventing early graft occlusion in CABG.
  • Adherence to these technical parameters can enhance graft patency and patient outcomes.

Keywords:
coronary graftmathematical model

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