Transverse Sinus Drainage Dominance Patterns

Morphological Study in Cerebral Angiography Exams

Abstract

Objective: To investigate the pattern of dural sinus drainage dominance through the prevalence of anatomical variations of the ST in digital cerebral angiography exams. Methods: This is a cross-sectional, observational, and retrospective study, with non-probabilistic convenience sampling, performed through the analysis of 83 2D digital brain angiography exams. Results: In males, a right dominance pattern of 32.43%, a left ST dominance pattern of 8.11%, and a symmetrical pattern of 59.46% were observed. In females, the percentages were 32.61%, 6.52 and 60.87 for the right, left, and symmetrical ST dominance patterns, respectively. For all subjects, the highest percentage was the symmetrical dominance of the ST, around 60.24%. Conclusion: The most prevalent transverse sinus drainage pattern identified was symmetrical, regardless of the individual's sex. When dominance was identified, the right pattern was the most prevalent. The most prevalent variation was left transverse sinus hypoplasia. Rare variations such as ST agenesis were found. No differences were identified between sex.