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• W1750892645 abstract "The major limitation of coronary angioplasty (PTCA) is the problem of restenosis. The fibrocelular response is the principal mechanism of restenosis and is also the main component of the development of atherosclerotic lesions. Furthermore, the long-term evolution in the residual estenosis in patients without early restenosis in not completely known.STUDY OBJECTIVES.- To determine the relationship between early restenosis post-PTCA and the long-term atherosclerosis progression, an angiographic study was performed in a series of consecutive patients who underwent a successful PTCA. In the same cohort of patients, the long-term evolution of the residual stenosis was evaluated.METHODS.- Ninety eight patients whom underwent a successful PTCA were included to evaluate the relationship between restenosis and progression, and 63 patients, without early restenosis, were included in a sequential study to determine the long-term evolution of the residual estenosis post-PTCA. Changes in the stenosis severity were analysed by quantitative coronary angiography. Restenosis was defined as a stenosis +/- 50 % during the follow-up. Atherosclerosis progression was defined as a more 20% decrease in the diameter of a vessel initially narrowed by +/- 50% or a +/- 30% decrease when the initial stenosis was < 50%.RESULTS.- Atherosclerosis progression and coronary angioplasty.- An early angiographic follow-up was performed 5 ± 2 months after angioplasty. Restenosis was documented in 37 patients (38%). These patients were again angiographically evaluated 32 ± 10 months post-PTCA. A new angiographic study was performed in 58 patients without restenosis, 34 ± 12 months post-procedure. Coronary progression was observed in 53 segments from 31 patients (34%) more than 18 months post-angioplasty.In the evaluation of the relationship between restenosis post-angioplasty and atherosclerosis progression, long-term progression was documented in 22 (38%) of the 58 patients without restenosis, in comparison to 9 (33%) of 27 patients with restenosis (p= NS).Long-term evolution of the residual stenosis post-angioplasty.- In the group of patients evaluated to determine the evolution of the residual stenosis, an angiographic study was performed 5 ± 1 month and 37 ± 20 months after the procedure. Coronary angioplasty produced an initial reduction in the percentage of stenosis from 72 ± 13 % pre-PTCA to 41 ± 14 % (p< 0.0001) immediately post-PTCA. In the early angiogram 5 ± 1 month post-angioplasty, the residual stenosis showed a severity of 31 ± 14 % (p<0.001 vs immediately post-PTCA). Additionally, in the control performed 37 ± 20 months after, the residual stenosis experienced a further reduction to 23 ± 15 % (p<0.001 vs 5 months).CONCLUSIONS: Restenosis post-angioplasty and progression of atherosclerosis are independent phenomena. In patients without restenosis, the residual stenosis post-angioplasty shows a long-term reduction during the follow-up. " @default.
• W1750892645 created "2016-06-24" @default.
• W1750892645 creator A5090201884 @default.
• W1750892645 creator A5023033818 @default.
• W1750892645 date "1994-02-04" @default.
• W1750892645 modified "2023-09-27" @default.
• W1750892645 title "Progresión de la aterosclerosis y evolución de la estenosis residual despues de la angioplastia coronaria: Estudio angiográfico seriado" @default.
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