From the Cardiac Catheterization Unit (F.R., G.S., A.D.), Division of
Cardiology (A.V., V.F., E.U.), and Laboratory for Clinical Biochemistry (T.C.,
S.G.), Ospedale Santa Croce, Cuneo, Italy.
Correspondence to Giuseppe Steffenino, MD, Laboratorio di Emodinamica, Ospedale Santa Croce, Via Michele Coppino 26, 12100 Cuneo, Italia. E-mail emodinam{at}www.lrcser.it
BackgroundLipoprotein(a) is a risk
factor for coronary artery disease. Although it has been
implicated in restenosis after balloon angioplasty, its role in
restenosis within coronary stents is unknown. The aim
of the study was to assess the role of plasma lipoprotein(a) as a
predictor for restenosis after elective coronary
stenting.
Methods and ResultsElective, high-pressure stenting of de novo
lesions in native coronary arteries with Palmaz-Schatz stents
was performed in 325 consecutive patients. Clinical, angiographic, and
biochemical data were analyzed prospectively. Angiographic
follow-up was performed at 6 months. Lipoprotein(a) levels were
compared in patients with and without restenosis. Angiographic
follow-up was obtained in 312 patients (96%); recurrence was
observed in 67 patients (21.5%). No clinical or biochemical
variable was associated with restenosis. Lipoprotein(a)
level was 37.81±49.01 mg/dL (median, 22 mg/dL; range, 3 to 262 mg/dL)
in restenotic patients and 36.95±40.65 mg/dL (median, 22
mg/dL; range, 0 to 244 mg/dL) in nonrestenotic patients
(P=NS). The correlations between percent diameter
stenosis, minimum luminal diameter, and late loss at follow-up
angiography and basal lipoprotein(a) plasma level after logarithmic
transformation were 0.006, 0.002, and 0.0017, respectively. Multiple
stents were associated with a higher incidence of restenosis
(P=0.006), but biochemical data in these patients were
similar to those treated with single stents.
ConclusionsThe basal plasma level of lipoprotein(a) measured
before the procedure is not a predictor for restenosis after
elective high-pressure coronary stenting.
© 1998 American Heart Association, Inc.
Clinical Investigation and Reports
Plasma Lipoprotein(a) Is Not a Predictor for Restenosis After Elective High-Pressure Coronary Stenting
Key Words: stents restenosis lipoprotein(a)
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