Effect of balloon inflation time on expansion of sirolimus-eluting stent.
There is little information about the relationship between balloon inflation time and sirolimus-eluting stent (SES) expansion. In this randomized intravascular ultrasound (IVUS) study, 92 de novo lesions in native coronary arteries that underwent SES implantation were enrolled. Sirolimus-eluting stent was implanted using an inflation pressure of 14 atm. Stent balloon was gradually inflated until 14 atm in 10 s. In the short inflation group, it was deflated immediately after an image of the balloon inflated at 14 atm was taken. Stent balloon inflation lasted 60 s in the long inflation group. Intravascular ultrasound was then performed. The long balloon inflation resulted in a larger stent cross-sectional area (4.9 +/- 1.6 mm(2) vs 4.3 +/- 1.4 mm(2), P < 0.05) and expansion (71% +/- 13% vs 60% +/- 13%, P < 0.001) compared to the short balloon inflation, although stent expansion was relatively low in both groups. The relatively longer balloon inflation time using an inflation pressure of 14 atm results in better SES expansion. However, in the majority of lesions, adequate stent expansion is not achieved even using long balloon inflation, if it is inflated at 14 atm.
Department of Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine, Chuo-ku, Chiba, Japan.
Tatsuhiko
T
Asano
Yoshio
Y
Kobayashi
Kenichi
K
Fukushima
Yo
Y
Iwata
Hideki
H
Kitahara
Naoki
N
Ishio
Takashi
T
Nakayama
Nakabumi
N
Kuroda
Issei
I
Komuro
D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000295:instrumentation*; D002317:Cardiovascular Agents / Q000008:administration & dosage*; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000628:therapy*; D054855:Drug-Eluting Stents; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011312:Pressure; D011446:Prospective Studies; D011474:Prosthesis Design; D020123:Sirolimus / Q000008:administration & dosage*; D013997:Time Factors; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional
D002317:Cardiovascular Agents; D020123:Sirolimus