title: Angiographic assessment of the stretch-recoil-gain relation after balloon coarctation angioplasty and its relation to late restenosis.
abstract: The effects of stretch and immediate recoil after balloon angioplasty were evaluated in 21 patients with coarctation of the aorta who underwent balloon coarctation angioplasty. A total of 28 procedures were performed in these patients, who ranged in age from 1 month to 17 years with a mean of 4.3 years. The systolic pressure gradient and coarcted diameter changed significantly from 42 +/- 22 to 14 +/- 9 mmHg (P < 0.0001) and from 4.0 +/- 1.7 to 6.1 +/- 2.0 mm (P < 0.001), respectively. Immediate recoil was responsible for the loss of 33% of the potentially achievable coarcted dimension. Recoil was determined mainly by the degree of arterial stretch. Gain increased exponentially with an increase in stretch. There was a narrow range of % stretch (60-80%) within which an effective diameter gain could be obtained. Both gain and stretch were the best predictors for late restenosis: patients with a larger immediate gain and stretch developed more restenosis. These results suggest that the stretch-recoil-gain relationship may be clinically important for evaluating the best predictor of late restenosis after balloon coarctation angioplasty.
authors.affiliation: Department of Pediatrics, Juntendo University School of Medicine, Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ino
authors.forename: M
authors.initials: M
authors.lastname: Ohkubo
authors.forename: K
authors.initials: K
authors.lastname: Akimoto
authors.forename: K
authors.initials: K
authors.lastname: Nishimoto
authors.forename: K
authors.initials: K
authors.lastname: Yabuta
authors.forename: S
authors.initials: S
authors.lastname: Kawasaki
authors.forename: M
authors.initials: M
authors.lastname: Watanabe
authors.forename: Y
authors.initials: Y
authors.lastname: Hosoda
mesh_terms: D000293:Adolescent; D000800:Angioplasty, Balloon; D001011:Aorta / Q000033:anatomy & histology / Q000503:physiopathology*; D001017:Aortic Coarctation / Q000000981:diagnostic imaging / Q000628:therapy*; D001027:Aortography; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012008:Recurrence