Clinical comparison between spiral CT coronary angiography and coronary angiography in the diagnosis of coronary myocardial bridge in patients with coronary heart disease

Abstract

Objective To investigate the clinical value of spiral CT coronary angiography (SCTCA) and coronary angiography (CAG) in the diagnosis of coronary myocardial bridge in patients with coronary heart disease. Methods The imaging data of SCTCA and CAG of 877 patients with coronary heart disease were retrospectively analyzed. The diagnostic consistency of coronary myocardial bridge and the measurement result of myocardial bridge length and mural coronary artery stenosis degree between SCTCA and CAG were compared. Results Two imaging methods in the diagnosis of superficial type and deep type myocardial bridge in patients with coronary heart disease had good consistency (Kappa = 0.872). The CAG measurement results of superficial type and deep type myocardial bridge length were significantly lower than the SCTCA measurement results: (5.46 ± 2.21) mm vs. (7.12 ± 3.04) mm and (9.75 ± 3.28) mm vs. (11.38 ± 4.44) mm, and there were statistical differences (P<0.05). The CAG measurement results of superficial type and deep type mural coronary artery stenosis degree were significantly higher than SCTCA measurement results: (38.08 ± 6.37)% vs. (31.69 ± 5.11)% and (60.40 ± 11.86)% vs. (52.38 ± 9.27)%, and there were statistical differences (P<0.05). Conclusions SCTCA and CAG in the diagnosis of coronary myocardial bridge in patients with coronary heart disease have good consistency. The SCTCA in diagnosis accuracy of myocardial bridge length is better than CAG, but the CAG in the diagnosis of mural coronary artery stenosis degree is better. Key words: Coronary artery disease; Myocardial bridging; Tomography, spiral computed; Coronary angiography; Retrospective studies