During the performance of an angiotecnich in a human heart, to highlight the coronary circulation, we observed the presence of myocardial bridges in the anterior and medial branches of the left coronary artery, in this heart was also demonstrated the presence of an artery trifurcation left coronary branches that originated the anterior interventricular, circumflex and median. Myocardial bridges are intriguing entities that do not always show signs and symptoms, the presence of the median artery in hearts with myocardial bridges, is one of the factors that may explain the absence of signs and symptoms in some patients with this entity. Moreover the myocardial bridges can explain the signs and symptoms of ischemia on functional testing.