Incidence and clinical significance of myocardial bridging
with ECG-gated 16-row MDCT coronary angiography
- Author(s)
- Sung-Min Ko; Jin-Soo Choi; Chang-Wook Nam; Seung-Ho Hur
- Keimyung Author(s)
- Ko, Sung Min; Choi, Jin Soo; Nam, Chang Wook; Hur, Seung Ho
- Department
- Dept. of Radiology (영상의학)
Dept. of Internal Medicine (내과학)
- Journal Title
- International Journal of Cardiovascular Imaging
- Issued Date
- 2008
- Volume
- 24
- Issue
- 4
- Abstract
- Aims The aims of this study were to
evaluate the incidence and the clinical significance of
myocardial bridging in 401 patients with chest pain
examined with 16-row Multidetector CT (MDCT)
coronary angiography. Material and methods Four
hundred nine consecutive patients who had chest pain
or symptoms suggestive of coronary artery disease
were involved in this study. Patients with heart rates
‡65 beats/min received 25–50 mg of atenolol orally
1 h before the scan. CT coronary angiography was
performed with a 16-row MDCT scanner. CT coronary
angiographic images were evaluated by
consensus of two radiologists, who were blinded to
clinical information. Clinical correlation was made
between the presence and type of myocardial bridging
on MDCT and the clinical results based on
history, examination, and any subsequent clinical
workup at the 2-month follow-up by a consensus of
two physicians. Results Among the 401 patients, 23
(5.7%) cases of myocardial bridging were detected.
Twenty-one (5.2%) cases of myocardial bridging
were located at the middle third of the left anterior
descending coronary artery (LAD), one (0.25%) case
was at the proximal third of the LAD, and one
(0.25%) case was at the distal third of the LAD.
Superficial bridging was identified in 15 patients and
deep bridging in 8. The length of tunneled artery was
between 5 and 27 mm, with a mean of 15.7 mm, and
the depth of tunneled artery was between 1.0 and
7.0 mm, with a mean of 3.2 mm. Out of four patients
whose chest pain was assumed to be associated with
myocardial bridging, three patients had deep bridging.
In the other 19 patients with bridging, alternative
causes of chest pain were present. Conclusions We
found the incidence of myocardial bridging in this
patient group to be 5.7%. Larger multicenter studies
are required to evaluate the incidence of myocardial
bridging and to determine a link between myocardial
bridging and chest pain.
Keywords Cardiac imaging Coronary arteries
CT coronary angiography MDCT
Myocardial bridging
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