It was reported via journal article title: modified single-patch compared with two-patch repair of complete atrioventricular septal defect authors: shinya ugaki, md, phd, nee s.Khoo, mbchb, david b.Ross, md, ivan m.Rebeyka, md, and ian adatia, mbchb citation: ann thorac surg.2014; 97: 666 72.Doi: http://dx.Doi.Org/10.1016/j.Athoracsur.2013.09.084 the authors compared the outcomes of modified single-patch and two-patch surgical repair of complete atrioventricular septal defect (cavsd) on left ventricular outflow tract (lvot) diameter and on left atrioventricular valve (lavv) coaptation.The authors reviewed retrospectively post-operative 2-dimensional echocardiograms of all cavsd patients who underwent modified single-patch or two-patch repair between 2005 and 2011.A total of 51 patients (16 male infants and 35 female infants) underwent cavsd repair at a median age of 4 months (age range: 1 to 9 months).Of which 29 patients underwent single-patch while 22 patients underwent the two-patch technique.During the surgical procedure for the modified single-patch technique, the zone of apposition (lavv cleft) was closed with a series of interrupted prolene sutures.Then, a series of horizontal mattress pledgeted prolene sutures was passed through the right side of the ventricular septal crest and through the base of the lavv before being passed through a trimmed bovine pericardium.The sutures were then tied to close the ventricular component, with the lavv sandwiched between the bovine patch and the crest of the ventricular septum.The bovine pericardial patch was secured to the rim of the ostium primum defect with continuous prolene suture, leaving the coronary sinus draining normally to the right atrium.In the two-patch repair technique, the zone of apposition (lavv cleft) was approximated with interrupted prolene sutures before the atrial septal defect was closed.In the modified single-patch technique, reported complications involved 1 patient with complete antrioventricular block which required pacemaker implantation, it was concluded that the modified single-patch repair was performed with significantly shorter bypass time and myocardial ischemic time.
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