Specific anatomical aspects of the aortic opening (Ostium aortae) and of the left cardiac artery (A. coronaria sinistra) in swine.

Abstract

Our researches focused on high lightening the possible particularities existent at different subjects taken into study, regarding the aortic ventricular foramen, the semilunar valves and the original aperture of the left coronary artery. Also the possible trajectory and distribution variability of the left coronary artery was analyzed, taking into consideration the variations of this artery in human. The left coronary artery were studied on fresh hearts, gathered from 11 subjects of different ages, sexes and sizes. The vascular and hollow lumen was washed repeatedly with water and then injected progressively with Palux substance colored for contrast with red pigment. The hearts injected were introduced for 48 hours in a formaldehyde 2% solution and afterwards the dissection under a magnifying glass was made. In a single case the lack of the left arterial trunk was noticed, the paraconal artery and the left cardiac artery presenting a common foramen in the left aortic sinus. Regarding the existence of the left coronary artery, this was in a direct continuance with the paraconal artery and forming a right angle with the left cardiac circumflex artery. Through their distribution, the collaterals of the paraconal artery involve the right ventricular myocardium, as well as the left one in different proportions. The atrium collaterals of the left circumflex artery involve also the atrium-ventricular nodule. The vascular foramen measurements and their trajectories are not related to the age and size of the subject. The sigmoid valves are reduced. In one case the lack of the left coronary arterial trunk was noticed.