In-hospital and 1-year outcomes among unselected percutaneous coronary intervention patients treated with either sirolimus- or paclitaxel-eluting stents: results from the EVENT (Evaluation of Drug Eluting Stents and Ischemic Events) registry.
OBJECTIVE
The aim of this study was to compare outcomes among unselected patients undergoing percutaneous coronary intervention (PCI) with either sirolimus-eluting (SES) or paclitaxel-eluting stents (PES).


BACKGROUND
Although the benefits of both SES and PES are well-established, studies comparing these stents directly have yielded conflicting results.


METHODS
We used data from the EVENT (Evaluation of Drug Eluting Stents and Ischemic Events) registry to compare in-hospital and 1-year outcomes among unselected patients undergoing nonemergent PCI with either SES or PES implantation.


RESULTS
Between July 2004 and June 2006, 6,035 patients underwent PCI with either SES (n = 3,443) or PES (n = 2,592) at 47 U.S. centers. Baseline clinical and angiographic characteristics were generally similar for the 2 stent types. At 1-year, there were no differences in the primary end point of cardiac death or myocardial infarction (MI) between the SES and PES groups (9.1% vs. 10.0%, p = 0.11) or in any individual end points including cardiac death, nonfatal MI, or stent thrombosis. In unadjusted analyses, target lesion revascularization (TLR) was slightly more common with SES than with PES (4.4% vs. 3.3%, p = 0.048), but this difference was no longer apparent after adjusting for baseline characteristics as well as site-related factors (adjusted hazard ratio: 1.09, 95% confidence interval: 0.78 to 1.50).


CONCLUSIONS
Among unselected patients undergoing PCI, adjusted rates of both ischemic complications as well as clinically important restenosis were similar for SES and PES. The unexpected finding that TLR was influenced by site characteristics suggests that the correlation between TLR and angiographic restenosis might be weaker than previously described and warrants further study.
Novack
Victor
V
Harvard Clinical Research Institute, Boston, Massachusetts, USA.
Cutlip
Donald
D
Kleiman
Neal
N
Pencina
Michael
M
Mauri
Laura
L
Yen
Chen-Hsing
CH
Berger
Peter
P
Goldberg
Steven
S
Kellett
Mirle
M
Waksman
Ronald
R
Hong
Mun
M
Raizner
Albert E
AE
Cohen
David J
DJ
D054058:Acute Coronary Syndrome / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000295:instrumentation* / Q000401:mortality; D002317:Cardiovascular Agents / Q000008:administration & dosage*; D017023:Coronary Angiography; D023903:Coronary Restenosis / Q000209:etiology; D023921:Coronary Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D054855:Drug-Eluting Stents; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology; D017239:Paclitaxel / Q000008:administration & dosage*; D016016:Proportional Hazards Models; D011446:Prospective Studies; D011474:Prosthesis Design; D012042:Registries; D018570:Risk Assessment; D012720:Severity of Illness Index; D020123:Sirolimus / Q000008:administration & dosage*; D013927:Thrombosis / Q000209:etiology; D013997:Time Factors; D016896:Treatment Outcome; D014481:United States
D002317:Cardiovascular Agents; D017239:Paclitaxel; D020123:Sirolimus