Immediate results and dilatation effect of the vein-covered Palmaz-Schatz stent assessed by intravascular ultrasound.
To evaluate the clinical results of stenting using the vein-covered Palmaz-Schatz (PS) stent by intravascular ultrasound (IVUS). Twenty-eight patients with angina pectoris or confirmed ischemia were entered into this study. Thirteen were allocated to the vein-covered PS stent group and 15 to the normal Palmaz-Schatz stent group. The immediate clinical results in these groups and changes in lumen dimension as assessed by IVUS, were investigated. Acute success was 100% in both groups. There were no immediate complications. Subacute thrombosis occurred in one patient in the vein-covered PS group. In the vein-covered PS group, percent diameter stenosis of the involved coronary artery changed from 70.2% before stenting to 8.8% immediately after and 42.2% at 5 months follow-up. The respective values were 84.5%, 13.4%, and 36.5% in the normal Palmaz-Schatz group. Restenosis in the vein-covered group was 23.1% and in the Palmaz-Schatz group was 20%, showing no significant differences between the two groups. The luminal area in the vein-covered group as assessed by IVUS increased from 3.2 mm2 to 7.4 mm2 (pre to post) and from 3.2 mm2 to 8.2 mm2 in the normal Palmaz-Schatz group. The plaque area decreased from 13.6 mm2 to 10 mm2 (pre to post) in the vein-covered group and from 13.0 mm2 to 9.2 mm2 in the Palmaz-Schatz group. In this study, conducted in a limited number of cases, it is possible to use vein-covered stent like as usual Palmaz-Schatz stent. The vein-covered stent had less dilative effect compared with the Palmaz-Schatz stent. This was probably because of its increased profile but there was no difference in the occurrence of subacute thrombosis or in restenosis rate.
Muramatsu
T
T
Cardiovascular Division, Health Insurance General Kawasaki Central Hospital, Kanagawa Prefecture, Japan.
Tukahara
R
R
Hou
M
M
Ito
S
S
Inoue
T
T
D000368:Aged; D000787:Angina Pectoris / Q000628:therapy; D003327:Coronary Disease / Q000000981:diagnostic imaging; D003331:Coronary Vessels / Q000000981:diagnostic imaging; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000628:therapy; D011183:Postoperative Complications; D015607:Stents; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional; D014664:Vasodilation / Q000502:physiology; D014680:Veins