Abstract:

Introduction: the problem of restenosis prevention and its early detection is very important in patients who underwent coronary intervention with bare-metal stent (BMS) implantation in acute coronary syndrome (ACS). But when is it necessary to perform elective coronary angiography in order not to miss possible restenosis development? This question needs to be answered.

Aim: was to define the correct period to perform elective coronary angiography after bare-metal stent implantation in acute coronary syndrome.

Material and methods: the study included 124 patients who underwent coronary intervention with BMS implantation in ACS, in period of 1-14 months before current admission. All patients included in this study had indications for repeating coronary angiography and were diagnosed hemodynamically relevant in-stent restenosis. No risk factors of restenosis were revealed at these patients.

Results: average time of restenosis detection was 7,9±1,99 months. Average percent of restenosis among all included patients was 68,6±13,1%. We also revealed direct correlation of percent of restenosis with time of restenosis detection (r=0,5785, p <0,05). Correlation between time and percentage of restenosis and stent type or TIMI grade, was also estimated in this study.

Conclusion: according to results of our study, there are good reasons to repeat coronary angiography in 7-9 month after BMS implantation in ACS, even if patients have no risk factors of restenosis.

References

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Abstract:

Aim. Was to analyze atherosclerotic disease dynamics and long-term results (up to 5 years) after implantation of bare-metal stents (BMS) and sirolimus-eluting stents (SES) in patients with multivascular coronary disease

Methods and results. We have analyzed clinicaland angiographic results data of percutaneous coronary interventions (PCI) of 585 patients with multivascular coronary disease during 5-years of follow-up period. 264 patients were treated with BMS, 321 - with SES We used Cypher drug-eluting stents (sirolimus-eluting stents) in the first group and BX Velocity bare-metal stents in the second group of patients

During first year of follow-up the incidence of symptoms reoccurrence in BMS and SES groups was 22,3% and 11,8% (р < 0,05) repeated PCI was performed in 15,6% and 3,9% (р < 0,05), CABG - 2,8% and 0,3% (р < 0,05), the incidence of myocardial infarction (MI) was 1,4% and 0,9%. The restenosis rate in BMS and SES groups was 19,7% and 2,3% (р < 0,05), late thrombosis (LT) - 0,3% and 1,4% The survival without MACE was higher in SES group

During 5 years of follow-up the cumulative incidence of symptoms reoccurrence in BMS and DES groups was 30,7% and 22,7% repeated PCI was performed in 23,9% and 18,1% (р < 0,05), CABG - 6,4% and 4,7%, the incidence of myocardial infarction (MI) was 6,5% and 7,8%. The progression of atherosclerosis in early stented segments in BMS and SES groups was 6,6% and 10,1%, late thrombosis (LT) - 0,4% and 2,1%. There was no difference in survival without MACE between groups

Conclusions. By the end of the first year of follow-up the incidence of angina reoccurrence and repeat revascularization in patients with multivascular coronary disease was higher in BMS group compared with SES group. The survival without MACE was also higher in SES group. By the end of the fifth year of follow-up there was no difference in angina reoccurrence, repeated revascularization and surviva without MACE because the late thrombosis and atherosclerosis progression in early stented segments was more common in DES group. 

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