科研之友
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摘要
the relationships between the coronary arteries and the atrioventricular rings are important in cases of substitution or plastic of the corresponding valve. the vicinity of the circumflex branch of the left coronary artery to the left atrioventricular ring, at level of the previous corner, it has brought surgical complications, in some cases with fatal results. due to this, we consider necessary to study the relationships biometric between the coronary arteries and the left atrioventricular ring. we use 58 hearts, 28 fixed hearts of chilean individuals and 30 fresh hearts of brazilian individuals, of ages between 18 and 84 years, of both sexes and without apparent heart surgery. the region of both coronary sulcus was dissected and we classified the pieces according to the type of coronary dominance. later on, the atrium were dried up leaving visible the atrioventricular rings and their relationship with the coronary arteries. measurement of the distances were made (in mm) of the coronary arteries and their branches, in relation to the left atrioventricular ring. five points settled down in the later portion of the ring, distributed in having felt anti-timetable. the points 1 and 5 located at level of the previous and later corners, respectively. the smallest distance between the branches of the coronary arteries and the left atrioventricular ring was presented in hearts with left coronary dominance, and it was of 3,8 mm (fixed hearts) and 3,0 mm (fresh hearts).
