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  Indian J Med Microbiol
 

Figure 4: Origin of the left coronary artery from the right coronary sinus and its course in relation to great vessels. (a) Anterior or prepulmonic, left coronary artery courses to the left anterior to the pulmonary artery and is usually asymptomatic. (b) Posterior or retroaortic, left coronary artery courses dorsal to the ascending aorta. (c) Preaortic or interarterial, left coronary artery courses to the left and posteriorly between the aortic and pulmonary roots. This is the most common subtype and in view of compression by the aortic root, and pulmonary root has been reported to be associated with myocardial ischemia and sudden death in the young athlete. (d) Subpulmonic or septal course, left coronary artery courses to the left and inferiorly burrowing into the interventricular septum through the crista supraventricularis or outflow septum. This type is also usually asymptomatic

Figure 4: Origin of the left coronary artery from the right coronary sinus and its course in relation to great vessels. (a) Anterior or prepulmonic, left coronary artery courses to the left anterior to the pulmonary artery and is usually asymptomatic. (b) Posterior or retroaortic, left coronary artery courses dorsal to the ascending aorta. (c) Preaortic or interarterial, left coronary artery courses to the left and posteriorly between the aortic and pulmonary roots. This is the most common subtype and in view of compression by the aortic root, and pulmonary root has been reported to be associated with myocardial ischemia and sudden death in the young athlete. (d) Subpulmonic or septal course, left coronary artery courses to the left and inferiorly burrowing into the interventricular septum through the crista supraventricularis or outflow septum. This type is also usually asymptomatic