Abstract
BackgroundAlthough the incidence of myocardial bridge (MB) has been defined in different femoral access conventional coronary angiography (FACCA) studies, the frequency of MB on radial access coronary angiography (RACA) is unknown. The aim of this study was to determine the difference in the incidence of MB between patients undergoing RACA and FACCA.MethodA total of 2500 consecutive patients who underwent RACA and a total of 1455 consecutive patients who underwent FACCA were retrospectively investigated to detect the presence of MB. The incidences of the groups were calculated separately and compared. The clinical and angiographic features of the patients with MB were analyzed.ResultsMB was detected at an incidence of 10.2%, in 255/2500 patients who underwent RACA, and 1.8% in 27/1455 patients who underwent FACCA (p < 0.001). In both RACA and FACCA patients, the most involved coronary artery was the left anterior descending artery (LAD) (86.9% and 93.1%) and the mid-segment (84.9% and 88.9%) was the most affected section. Co-involvement of multiple coronary arteries by MB was 7.8% in patients who underwent RACA and 7.4% in patients who underwent FACCA. Coronary artery disease (CAD) was determined in 111 (35.7%) of the coronary arteries with MB, of which 81.9% were proximal to the MB. No significant CAD was detected in any of the vessels of 69.8% (178/255) of the patients who underwent RACA for different clinical indications.ConclusionThese data demonstrated that the incidence of myocardial bridge able to be detected on RACA was much higher than FACCA.
Highlights
Myocardial bridge (MB) is an anatomic variation in which some of the epicardial coronary arterial segments run into the myocardium
Coronary artery disease (CAD) was determined in 111 (35.7%) of the coronary arteries with myocardial bridge (MB), of which 81.9% were proximal to the MB
No significant CAD was detected in any of the vessels of 69.8% (178/255) of the patients who underwent radial access coronary angiography (RACA) for different clinical indications. These data demonstrated that the incidence of myocardial bridge able to be detected on RACA was much higher than femoral access conventional coronary angiography (FACCA)
Summary
Myocardial bridge (MB) is an anatomic variation in which some of the epicardial coronary arterial segments run into the myocardium. MB is characterized by narrowing during the systole of the coronary artery by overlying muscle fibers [1, 2]. It usually occurs in the mid-segment of the left anterior descending coronary artery (LAD) [3, 4]. The incidence of myocardial bridge (MB) has been defined in different femoral access conventional coronary angiography (FACCA) studies, the frequency of MB on radial access coronary angiography (RACA) is unknown.
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