title: [Visualization of sinus node arteries by multislice spiral computed tomography coronary angiography].
abstract: OBJECTIVE
  To assess the capabilities of multislice spiral computed tomography coronary angiography (MSCT-CA) to visualize the anatomy of the sinus node artery (SNA).
  
  
  METHODS
  The retrospective analysis of coronary artery examinations covered 46 patients with the referral diagnosis of coronary heart disease. MSCT-CA showed no evidence of coronary artery stenosis. This sample included 23 (50%) men and 23 (50%) women; the mean age of the patients was 52.4 +/- 9.1 years; the mean height was 170 +/- 6.67 cm; the mean weight was 80.7 +/- 12.1 kg. X-ray computed tomography was carried out using a SOMATOM Definition AS+ 128-slice computed tomography scanner with retrospective ECG synchronization, reconstructed slice thicknesses of 1 and 3-mm. The Spearman correlation test was used for statistical data analysis.
  
  
  RESULTS
  The SNA was visualized in 83% of the patients. It originated from the right coronary artery (RCA) and the circumflex branch of the left coronary artery in 84 and 16% of cases, respectively. No significant association was found between the type of heart blood supply and that of sinus node one (r = 0.06). In 18% of cases, the SNA was visualized only at the level of the ostium, allowing the assessment of the origin of the artery, and at the level of its mid-third in 32%; the distal SNA bed was visualized up to its division; in 10% of them the artery could be visualized all the way, including the division (the dissipation site). Unclear visualization of the proximal SNA was observed among 17% of the patients in whom the SNA could not be visualized with a heart rate (HR) of more than 80 beats/min in 62.5% of the patients, less than 41 beats/min in 12.5%, and 60-61 beats/min in 25%. HR was not found to be associated with the quality of SNA visualization (r = 0.09).
  
  
  CONCLUSIONS
  MSCT can assess the anatomy of SNA up to the distal bed and dissipation site. In the overwhelming majority of the patients, the SNA originated from the RCA (84%) regardless of the type of heart blood supply. The best SNA visualization was noted with a HR of 50 to 80 beats per minute. There was no statistical relationship of the quality of visualization to HR.
authors.forename: L A
authors.initials: LA
authors.lastname: Bokeriia
authors.forename: V N
authors.initials: VN
authors.lastname: Makarenko
authors.forename: L A
authors.initials: LA
authors.lastname: Iurpol'skaia
authors.forename: S A
authors.initials: SA
authors.lastname: Aleksandrova
authors.forename: M A
authors.initials: MA
authors.lastname: Shliappo
mesh_terms: D000328:Adult; D017023:Coronary Angiography / Q000379:methods*; D003326:Coronary Circulation; D023921:Coronary Stenosis / Q000175:diagnosis / Q000503:physiopathology; D003331:Coronary Vessels / Q000000981:diagnostic imaging*; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography / Q000295:instrumentation / Q000379:methods; D017063:Outcome Assessment, Health Care; D058996:Quality Improvement; D012849:Sinoatrial Node / Q000503:physiopathology*; D013223:Statistics as Topic