Citation, DOI and article data
The taenia sagittalis originates from the crista terminalis and extends upwards and anteriorly dividing the atrial appendage into anteromedial and posterolateral divisions 1,2.
The taenia sagittalis is absent in about 15-20%, it forms a single bundle in up to 65% and multiple bands in about 20-25% of the population 1,3.
On thoracic or cardiac CT, the taenia sagittalis can be regularly visualized as a linear muscular band 1.
The presence of taenia sagittalis is of no pathologic significance, however, it might be of relevance in the following clinical situations 1,3:
- possible predisposing factor for atrial fibrillation
- atrial catheters might get stuck near the taenia sagittalis in complex atrial anatomy
- 1. Rajiah P, MacNamara J, Chaturvedi A, Ashwath R, Fulton N, Goerne H. Bands in the Heart: Multimodality Imaging Review. Radiographics. 2019;39(5):1238-1263. doi:10.1148/rg.2019180176
- 2. Siddiqui A, Daimi S, Gandhi K et al. Crista Terminalis, Musculi Pectinati, and Taenia Sagittalis: Anatomical Observations and Applied Significance. ISRN Anat. 2013;2013:803853. doi:10.5402/2013/803853
- 3. Kucybała I, Ciuk K, Klimek-Piotrowska W. Clinical Anatomy of Human Heart Atria and Interatrial Septum - Anatomical Basis for Interventional Cardiologists and Electrocardiologists. Part 1: Right Atrium and Interatrial Septum. Kardiol Pol. 2018;76(3):499-509. doi:10.5603/KP.a2017.0248