Imaging findings of the myocardial bridge-mural coronary artery with 256-slice coronary CT angiography / 实用放射学杂志

ABSTRACT

Objective To study the imaging findings of myocardial bridge-mural coronary artery (MBMCA)using 256-slice coronary CT angiography (CTA).Methods 335 patients with MBMCA were diagnosed in our hospital,189 of whom with complete data were collected.The image findings of the MBMCA on 256-slice coronary CTA were reviewed,and the related measurements were done by two independent radiologists.A statistical software (SPSS13.0)was used and P <0.05 was regarded as significant difference.Results The incidence of MBMCA was 8.1 1% on 256-slice coronary CTA.Most MBMCAs were seen in the left anterior descending artery (LAD)(79.59%)with mean length of (23.24±10.32)mm.The mean diameter of MBMCA was (2.21±0.73)mm on later systol phase and (2.35±0.76)mm on later distol phase (t=3.140,P =0.005).The thickness of myocardial bridge was (1.44 ±1.31)mm.The average area change from systol phase to distole phase was decreased by 24.62% on retrospective electrocardiogating coronary CTA. Among the 189 patients,only MBMCA was diagnosed in 100,and MBMCA in combination with coronary atherosclerosis was in 89. The MBMCA and coronary atherosclerosis were found in the same artery in 74.Conclusion Myocardial bridge-mural coronary artery is a poten-tial heart disease because of artery abnormality.Coronary CT angiography palys an important role in diagnosis of this disease.