[Visualization of sinus node arteries by multislice spiral computed tomography coronary angiography]

Area of Science:

• Cardiovascular Imaging
• Medical Imaging Technology
• Anatomical Visualization

Background:

• The sinus node artery (SNA) plays a crucial role in cardiac electrical conduction.
• Accurate visualization of the SNA is important for understanding cardiac electrophysiology and potential interventions.
• Multislice spiral computed tomography coronary angiography (MSCT-CA) is an advanced imaging technique.

Purpose of the Study:

• To evaluate the capability of multislice spiral computed tomography coronary angiography (MSCT-CA) to visualize the anatomy of the sinus node artery (SNA).

Main Methods:

• Retrospective analysis of 46 patients undergoing MSCT-CA for suspected coronary heart disease without stenosis.
• Utilized a 128-slice CT scanner with retrospective ECG synchronization.
• Reconstructed images with 1-mm and 3-mm slice thicknesses; Spearman correlation test for analysis.

Main Results:

• SNA visualization achieved in 83% of patients.
• SNA originated from the right coronary artery (RCA) in 84% and the circumflex artery in 16%.
• Optimal visualization occurred with heart rates between 50-80 bpm, though no statistical association with HR was found.

Conclusions:

• MSCT-CA is capable of assessing SNA anatomy up to its distal branches.
• The RCA is the predominant origin for the SNA.
• Heart rate influences visualization quality, with rates of 50-80 bpm yielding the best results.