Correlation between Doppler, Manual Morphometry, and Histopathology Based Morphometry of Radial Artery as a Conduit...

Area of Science:

• Cardiovascular Surgery
• Vascular Imaging
• Histopathology

Background:

• Long-term graft patency is crucial for survival after coronary artery bypass grafting (CABG).
• The radial artery is a preferred second-best conduit after the internal mammary artery for CABG.
• Assessing radial artery morphology preoperatively is key to ensuring graft success.

Purpose of the Study:

• To evaluate the morphologic characteristics of the radial artery using preoperative Doppler ultrasound.
• To compare Doppler ultrasound findings with intraoperative manual morphometry and postoperative histology-based morphometry.
• To validate Doppler ultrasound as a reliable noninvasive test for preoperative radial artery assessment in CABG.

Main Methods:

• A prospective study of 100 patients undergoing CABG using the radial artery.
• Radial artery assessment via preoperative Doppler ultrasound, intraoperative morphometry, and postoperative histopathology.
• Morphometric measurements included luminal diameter, intimal and medial thickness, and intima-media thickness ratio.

Main Results:

• Bland-Altman analysis showed a 95% limit of agreement between preoperative Doppler ultrasound and postoperative histopathology.
• Doppler ultrasound measurements of intimal/medial thickness and luminal diameter closely matched histological findings.
• The study validated Doppler ultrasound's accuracy in assessing key radial artery characteristics.

Conclusions:

• Preoperative Doppler ultrasound is an accurate and validated screening tool for evaluating radial artery conduits for CABG.
• This noninvasive modality reliably assesses intimal/medial thickness and luminal diameter, crucial for graft patency.
• Doppler ultrasound facilitates informed selection of radial arteries, potentially improving CABG outcomes.