Coronary Artery Disease, Coronary Disease, Heart Diseases
Conditions
Keywords
Coronary Artery Disease, Drug Eluting Stents, Intravascular Ultrasound, Optical Coherence Tomography, Intravascular Visualization
Brief summary
The objective of this research is to assess the clinical results of implantation of different drug eluting stents under aggressive intravascular ultrasound (IVUS) guided all the way up to 24 months after operation and to establish the significance of the data of an optical coherent tomography (OCT) for the assessment of direct results of stenting and the degrees of endothelization of stent after 6 months. The following hypothesis formed the base for this study: * IVUS guided intervention allows to improve the results and increase the safety of implantation drug eluting stents. * Suboptimal results according to IVUS data can influence the follow up results of treatment. * Suboptimal results according to OCT data, which are not revealed by IVUS, can influence the follow up results of treatment. * The use of strategy of stenting with the achievement of optimal results under the intravascular methods of visualization allows to reduce the time of application of antiplatelet therapy. * The modern limus-eluting stents do not differ in the follow up results in investigated criteria.
Detailed description
1000 consecutive patients are planned to be included who will underwent endovascular treatment answering for the inclusion criteria and having given informed consent to the inclusion in the study. Criteria for choosing the size of the stent according to the IVUS: * Support on the healthy parts of the vessel. * The diameter of the stent should match the diameter of media-media in the distal reference segment or be the average between the diameter of the lumen of the proximal and distal reference segments. * Postdilatation is sure to be in the stent: in the affected area by a large balloon over the initial diameter of the media-media, at the entrance of the stent - over the initial of the reference diameter of the lumen. After postdilatation a control is being performed with Virtual Histology (VH) IVUS and i-MAP, an optimal stent implantation is estimated. Criteria for optimal implantation: * Complete apposition around the entire circumference. * Symmetry index is more than 0.75. * Stent diameter is not less than 80% of nominal. * Lack of initial dissection at the edges of the stent. * Lack of prolapsed tissue. A comparison of all the data is carried out by groups with and without using of IVUS and by types of the stents, as well as by groups according to intraoperative results: (a) the optimal result by IVUS and OCT, (b) optimal result by IVUS; suboptimal - by OCT, (c) suboptimal results with IVUS and OCT, as well as in subgroups of optimal (d) and suboptimal (e) results by OCT in patients without IVUS.
Interventions
PROCEDUREIVUS-guided group
The randomization on groups was completed in accordance with stents to be implanted: Xience Prime/Xience V, Promus Element, Resolute Integrity, Biomatrix Flex, Nobori, Orsiro. In each group randomization on subgroups of IVUS-guided implantation and non-IVUS in the ratio 2:1 was completed. After randomization it is carried out coronary stenting under IVUS-control: a choice of length and diameter of stent - according to IVUS data. After the completion of implantation and postdilatation of stents the control IVUS is being used. If criteria of optimal implantation were not achieved, additional impact is being made: larger balloon, higher pressure, sufficient time of impact. In case of an additional impact the repeated control IVUS is being completed and the following results are being fixed. After control IVUS the OCT procedure is carried out. During OCT possible problems corresponding to stenting are being fixed. An additional impact based on OCT data is not being used.
PROCEDURENon-IVUS group
The randomization on groups was completed in accordance with stents to be implanted: Xience Prime/Xience V, Promus Element, Resolute Integrity, Biomatrix Flex, Nobori, Orsiro. In each group randomization on subgroups of IVUS-guided implantation and non-IVUS in the ratio 2:1 was completed. After randomization it is carried out coronary stenting under angiography control. After postdilatation control OCT is carried out. During OCT possible problems corresponding to stenting (malapposed struts, separate beams, a prolapse of fiber, microthrombosis) are being fixed. An additional impact based on OCT data is not being used.
Sponsors
The Orenburg Regional Clinical Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
* de novo lesion, * the diameter of a vessel is not less than 2,75 mm, * the length of lesion not more than 60 mm, * stenosis is more than 60 %, * possibility of a covering by no more than 2 stents, * there is no need in stenting of side branch (including left main coronary artery).
Exclusion criteria
* in-stent restenosis, * saphenous vein grafts, * the diameter of a vessel is less than 2,75 mm, * the length of lesion more than 60 mm, * there is a need in stenting of side branch (including left main coronary artery), * impossibility of long antiplatelet therapy, * impossibility of an appearance for control research
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| MACCE | Two years | Major adverse cardiac and cerebral events (MACCE), including death, a composite of major cardiac and cerebrovascular events, i.e. the first occurence of any of the following events: Death from any cause - From cardiovascular causes, From noncardiovascular causes; Stroke or transitory ischemic attack (TIA), Myocardial infarction (MI), Hospitalization for repeat revascularization procedure, target vessel revascularization by means of percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Restenosis | 6 months, two years | Percentage of stenosis by angiography and OCT data (based on external elastic membrane (EEM)) |
| In stent lumen late loss | 6 months, 2 years | Reduction of a lumen of artery after 6 months and 2 years after operation by OCT data |
| Stent Malapposition | 6 months, 2 year | Volume and Area of Stent Malapposition after 6 months and 2 years by OCT data |
| Neo-Intimal Plaque Volume and Area | 6 months, 2 years | Neo-Intimal Plaque Volume and Area after 6 months and 2 years by OCT data |
| Uncovered struts of stents | 6 months, 2 years | Detection and calculation of number of uncovered struts after 6 months and 2 years by OCT data |
Countries
Russia
Contacts
Primary ContactVictor V Demin, MD, PhD
Backup ContactStanislav A Dolgov
Outcome results
None listed