[A comparison of clinical and angiographic outcome after implantation of a Wiktor stent in large and small coronary arteries].
The objective of this study was to investigate the mid term influence of vessel size in clinical and angiographic outcome, after Wiktor stent implantation in arteries larger and smaller than 3 mm.


METHODS
A total of 188 stents were implanted in 167 patients divided in two groups. Group 1: stents implanted in arteries smaller than 3 mm, 40 stents in 38 patients. Group 2: in arteries larger than 3 mm. 148 stents in 129 patients. Clinical follow up and a repeated coronary angiographic study were carried out after six months.


RESULTS
Angiographic success was achieved in 97% and 98% cases, with clinical success in 92% and 95% respectively. Acute occlusion occurred in 2 patients of group 1 (5%), and in four patients in group 2 (2.7%); one patient died and four patients suffered a non-fatal myocardial infarction. During clinical follow up, nine patients presented a major complication, two in group 1 and seven in group 2 (5.5% vs. 5.6%). Asymptomatic survival was 86% and 84% respectively. In angiographic follow up we observed a restenosis rate of 41% of the patients in group 1 and 25% of those in group 2. Immediate gain was similar in both groups, but late loss (1.06 +/- 0.85 vs 0.97 +/- 0.86) and loss rate (0.60 vs 0.46) were greater in group 1.


CONCLUSIONS
The frequency of stent thrombosis as well as the incidence of restenosis were higher in arteries smaller than 3 mm. No differences were observed in the incidence of major ischemic events.
Carrillo-Calvillo
J
J
Servicio de Hemodinámica y Cardiología Intervencionista, Hospital Universitario de la Princesa, Madrid, España.
Martínez-Elbal
L
L
Gómez-Recio
M
M
Romero
C
C
Lozano
I
I
Aguilar
R
R
Rodríguez
C
C
D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000295:instrumentation; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015607:Stents; D016896:Treatment Outcome
Una comparación de los resultados clínicos y angiográficos del implante del stent Wiktor en arterias grandes y pequeñas.