[Changes of autologous coronary vessels and aortocoronary grafts in XXXX with ischemic heart disease after coronary artery bypass grafting].

@entity1 @entity850 @entity254 @entity453 @entity731 @entity33767
@entity33767 ) to assess effect of coronary lesion morphology on changes of grafts during first year after surgery; 2) to study the state of native coronary vascular bed during first year after surgery; 3) to elucidate special features of @entity731 in grafts and coronary arteries in remote period after surgery. MATERIAL AND METHODS: One hundred eighty seven @entity1 with 3-vessel @entity453 subjected to aorto-coronary or mammary-coronary grafting. RESULTS AND CONCLUSION: Proportions of closed venous grafts were 24,2% among grafts to arteries with 50-75% stenoses, 13.1% among grafts to occluded arteries (p=0.023), and 20.1% among grafts to arteries with 75-99% stenoses. Among venous grafts to arteries with lumen diameter <1.5 mm 30.4% were occluded what was significantly more than among grafts to vessels with 1.5-2.5 mm (15.5%, p=0.003) and >2.5 mm (14.5%, p=0.004) diameter. Morphological risk factors of venous graft closure in immediate postoperative period were 50-75% @entity850 and lumen diameter <1.5 mm. All mammary-coronary anastomoses were patent in 1 year, 99% of them remained patent 5 years after surgery. No relationship was found between patency of venous grafts after 5 years of follow-up and morphological characteristics (lumen diameter and percent @entity850 ) of bypassed arteries. During first year there was no significant differences between @entity1 with patent and occluded grafts both in incidences of novel @entity731 (10.4 and 10.3%, respectively, p=0.943) and proportion of closures of initially stenotic arteries (9.6 and 10.3%, respectively, p=0.085). After 5 years novel @entity731 were found in 31.9 and 33.6% of @entity1 with patent and occluded grafts, respectively (p=0.910). Complete occlusions of stenosed vessels proximal to @entity254 occurred more often among @entity1 with patent than with occluded grafts (28.6 and 15.9%, respectively, p=0.047). Thus in remote postoperative period development of @entity731 in proximal segments of arteries with patent grafts was more 'aggressive' than in arteries with occluded grafts.
