title: Late distortion of the original Palmaz stent implanted in postoperative lesions associated with congenital heart disease.
abstract: The objective of this study was to report late distortion of a Palmaz stent. Late distortion of an original Palmaz stent, implanted in an extracardiac lesion, is rare. We completed a 1-year follow-up of 54 patients who had been implanted with 80 Palmaz stents in extracardiac lesions. Distortion of two stents was detected in two patients. For case 1, we implanted a P188 stent for supravalvar pulmonary stenosis complicating an arterial switch operation in a 14-year-old girl. Seven months later, we found compression of the stent. Although we implanted two P308 stents anterior to the distorted stent, distortion of both stents developed after 1 month. Two more P308 stents placed inside each stent were gradually recompressed. A CAT scan showed compression of the stent by a dilated sinus of valsalva. For case 2, we implanted a P308 stent for stenosis of the superior vena cava after Williams operation in an 11-year-old boy. A chest X-ray documented longitudinal compression of the stent 27 months after implantation and a CAT scan showed the ascending aorta was in contact with the stent. A Palmaz stent may be distorted when implanted in a lesion adjacent to a pulsating aorta.
authors.affiliation: Department of Pediatrics, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan. tomitah@sapmed.ac.jp
authors.forename: Hideshi
authors.initials: H
authors.lastname: Tomita
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yazaki
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Echigo
authors.forename: Kohji
authors.initials: K
authors.lastname: Kimura
authors.forename: Motoki
authors.initials: M
authors.lastname: Takamuro
authors.forename: Norihisa
authors.initials: N
authors.lastname: Horita
authors.forename: Shigeto
authors.initials: S
authors.lastname: Fuse
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tsutsumi
mesh_terms: D000293:Adolescent; D015906:Angioplasty, Balloon, Coronary; D002648:Child; D005260:Female; D006330:Heart Defects, Congenital / Q000601:surgery; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D011475:Prosthesis Failure; D011662:Pulmonary Subvalvular Stenosis / Q000209:etiology / Q000601:surgery*; D015607:Stents / Q000009:adverse effects*; D013479:Superior Vena Cava Syndrome / Q000209:etiology / Q000601:surgery*; D013997:Time Factors