The anatomic evaluation of the internal mammary artery using multidetector CT angiography
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Cardiovascular Imaging - Original Article
P: 215-220
March 2012

The anatomic evaluation of the internal mammary artery using multidetector CT angiography

Diagn Interv Radiol 2012;18(2):215-220
1. Department of Radiology, GATA Hospital, Ankara, Turkey.
2. Department of Radiology, Gülhane Military Medical School, Ankara, Turkey
3. Departments of Radiology, Gülhane Military Medical School, Ankara, Turkey
4. Department of Radiology, Gülhane Military Medical Academy, Ankara, Turkey
5. Departments of Cardiology, Gülhane Military Medical School, Ankara, Turkey
6. Departments of Cardiovascular Surgery, Gülhane Military Medical School, Ankara, Turkey
No information available.
No information available
Received Date: 22.06.2011
Accepted Date: 05.07.2011
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ABSTRACT

PURPOSE

To determine the normal anatomic features and variations of the internal mammary arteries (IMAs) and to describe the relationship between the diameter and distance to the sternal edge of the IMAs, gender, and location (right-left) of the IMAs in patients who underwent multidetector computed tomography (MDCT) angiography of the thorax for various reasons.

MATERIALS AND METHODS

A total of 164 patients who underwent MDCT angiography of the thoracic vascular structures for various reasons were analyzed retrospectively. The right and left IMAs were analyzed individually, and normal anatomic features and variations were recorded. The relationships between gender, side and diameter of the IMAs, and distance to the sternal edge of the IMAs were evaluated.

RESULTS

There were 328 (164 right, 164 left) IMAs in 164 patients (110 males, 54 females; mean age, 43.96 years). A total number of five arteries (1.5%) had anatomic variation. Whereas 325 IMAs had an origin separate from the subclavian artery, three LIMA of the 328 arteries (0.91%) had a common origin with the thyrocervical trunk or costocervical trunk. Two (0.6%) IMAs (one LIMA and one RIMA) in the same patient were duplicated at the level of the first and second costal cartilage. There were no statistically significant correlations between age and diameter or between gender and diameter of the RIMA and LIMA at the origin and level of tracheal bifurcation (P > 0.05). Mean distance between the lateral margin of the sternum and midpoint of LIMA and RIMA were 12.42 mm and 13.00 mm, respectively.

CONCLUSION

The normal anatomic features and variations of the IMAs have an important role in cardiovascular bypass surgery, breast reconstruction, and percutaneous transthoracic procedures. MDCT angiography allows a precise and detailed evaluation of IMAs.