Surgical correction of incomplete form of open atrioventricular canal in adults

: Clinical and anatomo-hemodynamic features of adult patients with incomplete form of the open atrioventricular canal are presented, policy of surgical treatment and optimal degree of surgical intervention on mitral valve are determined. The study of variant anatomy of the defect, revealed two variants of left atrioventricular valve formation (with "functional" and with "anatomical" septal commissure). In the first anatomic variant the mitral insufficiency was hemodynamically important and required surgical correction. In the second variant, the mitral valve had good closure function, that permitted to avoid the routine suturing of anterior velum's splitting.