Morphological description and clinical implications of myocardial bridges: an anatomical study in Colombians
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Abstract
Background: Myocardial bridges represent a hotly debated research topic. Myocardial bridges are considered to be a
vascular heart variation due to its intermittent or enduring reducing of the arterial lumen, with a possible ischemic effect.
Objective: This study aimed at determining the incidence of myocardial bridges in the Colombian half-caste population.
Methods: 154 hearts were studied, having been extracted as fresh autopsy material. Coronary arteries were injected
with synthetic resin and cleaned by extracting the pericardial fat.
Results: 92 myocardial bridges were observed in 62 hearts (40.3%). Average myocardial bridge length was 19.9 mm.
Myocardial bridges varied per artery from one myocardial bridge in 42 hearts (27.3%), two myocardial bridges in 11
hearts (7.2%), three myocardial bridges in 8 hearts (5.2%) and four myocardial bridges in 1 heart (0.7%). Most myocardial
bridges coincided with the anterior interventricular artery in its proximal and intermediate segments in 61 cases (39.6%)
and left diagonal artery in 11 cases (7.2%). Arteries emitted just before myocardial bridges (pre-bridge branch) in 50
cases (54.3%) of the sample, with an average caliber of 1.41 mm. A third coronary artery was present in 46 cases (29.8%)
of total sample. A higher frequency of myocardial bridges was found in hearts with a third coronary artery.
Conclusion: It is necessary to consider the clinical importance of the variations considering the arterial distribution and
associated clinical implications.
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Atribución-NoComercial-CompartirIgual 2.5 Colombia