Prevalence and anatomical features of acute longitudinal stent deformation: An intravascular ultrasound study.
OBJECTIVE
We report the prevalence and anatomical features of longitudinal stent deformation as detected by intravascular ultrasound (IVUS) BACKGROUND: Angiographic studies have recently reported longitudinal stent deformation as a mechanical complication occurring during percutaneous coronary intervention; however, there are no IVUS studies on this phenomenon


METHODS
We retrospectively analyzed 1,489 consecutive stent-treated lesions in 1,057 patients who underwent IVUS post-stent implantation


RESULTS
Seventeen longitudinal stent deformations in 17 lesions (1.1% per lesion) in 17 patients (1.6% per patient) were identified by IVUS. Of the 17 IVUS-detected deformations, only three deformations (17.6%) were detectable by angiography. By IVUS, there were three patterns of longitudinal stent deformation: (1) Deformation with intra-stent wrinkling and overlapping of the proximal and distal stent fragments within a single stent (n = 14), (2) deformation with elongation (n = 2), and (3) deformation with shortening (n = 1). Most of the deformations were located near to the proximal stent edge (88%), consistent with the finding that they were observed in 11 ostial (65%) and eight left main lesions (47%), and 8.3% of 96 left main stented lesions had evidence of deformation


CONCLUSIONS
By IVUS, longitudinal stent deformation during percutaneous coronary intervention was seen more frequently than in previous studies; however, it is still uncommon (1.1%) except in the left main location. The most frequent pattern was intrastent wrinkling and overlapping of the proximal and distal stent fragments.
Clinical Trials Center, Cardiovascular Research Foundation, New York, New York; Division of Cardiology, Columbia University Medical Center, New York, New York.
Shinji
S
Inaba
Giora
G
Weisz
Nobuaki
N
Kobayashi
Shigeo
S
Saito
Tomotaka
T
Dohi
Liang
L
Dong
Lin
L
Wang
Joyce A
JA
Moran
LeRoy E
LE
Rabbani
Manish A
MA
Parikh
Martin B
MB
Leon
Jeffrey W
JW
Moses
Gary S
GS
Mintz
Akiko
A
Maehara
D000208:Acute Disease; D000368:Aged; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000601:surgery*; D003331:Coronary Vessels / Q000000981:diagnostic imaging / Q000601:surgery; D054855:Drug-Eluting Stents / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009518:New York / Q000453:epidemiology; D062645:Percutaneous Coronary Intervention / Q000379:methods*; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000453:epidemiology*; D015995:Prevalence; D011475:Prosthesis Failure; D012189:Retrospective Studies; D018084:Ultrasonography, Interventional / Q000379:methods*
IVUS; PCI; stent