A randomized comparison of a durable polymer Everolimus-eluting stent with a bare metal coronary stent: The SPIRIT first trial.
BACKGROUND
Everolimus is a sirolimus analogue with similar efficacy in animal models, and has been previously successfully tested in humans using an erodable polymer.


METHODS
This first-in-man single blind multi-centre randomized controlled trial assessed the safety and efficacy of everolimus eluting from a durable polymer on a cobalt chromium stent in patients with de novo native coronary artery lesions. Sixty patients were allocated to stent implantation with an everolimus-eluting stent (n=28) or an identical bare stent (n=32). Patients had either stable, unstable angina or silent ischaemia. Suitable lesions treated were single de novo native coronary lesions with 50-99% stenosis and could be covered by a 18 mm stent. The primary endpoint was in-stent late loss at 180 days, analysed on a per treatment basis. The major secondary endpoint was percent in-stent volume obstruction (%VO) as measured by intravascular ultrasound (IVUS) at 180 days. The clinical secondary endpoint was major adverse cardiac events (MACE) at 180 days.


RESULTS
At 6 months, (matched pairs angiographic analysis), the in-stent late loss, percentage diameter stenosis and percentage of patients with binary restenosis were 0.10 mm, 16% and 0% respectively, in the everolimus arm (n=23), as compared with 0.87 mm, 39% and 25.9%, respectively in the bare stent arm (n=27, p<0.001 for late loss and diameter stenosis, p = 0.01 for restenosis). Significantly less neointimal hyperplasia was observed in the everolimus group compared to the bare stent group (10 +/- 13 mm3 vs 38 +/- 19 mm3, p<0.001) and similarly, less volume obstruction (8.0 +/- 10.4% versus 28.1 +/- 14.0%, p<0.001). A major adverse cardiac event occurred in 2 patients in the everolimus arm versus 6 in the bare stent arm.


CONCLUSIONS
Everolimus eluted from a durable polymer on a cobalt chromium stent effectively suppresses neointimal growth at 6 months compared to an identical bare stent.
Serruys
Patrick W
PW
Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands.
Ong
Andrew T L
AT
Piek
Jan J
JJ
Neumann
Franz-Josef
FJ
van der Giessen
Willem J
WJ
Wiemer
Marcus
M
Zeiher
Andreas
A
Grube
Eberhard
E
Haase
Jürgen
J
Thuesen
Leif
L
Hamm
Christian
C
Otto-Terlouw
Patricia C
PC