[Technical modification and late results of arterial switch operation].

The success of arterial switch operations for transposition of the great arteries largely depends on faultless coronary translocation and subsequent sufficient myocardial perfusion. Occurrence of late coronary obstructions after arterial switch operation was often reported. We developed the bay window technique as a useful adjunct to prevent coronary complications. Late results of this technique are described. No coronary events occurred (i.e. inclusive of coronary stenosis, myocardial infarction, and coronary death). The bay window technique is an innovative and simple surgical adjunct for translocating complex coronary arteries.