Coronary Artery DiseaseNCT05406284
DK Nano-Culotte Stenting For Coronary Bifurcation Lesion
An observational study of Coronary Artery Disease, run by Istanbul Mehmet Akif Ersoy Educational and Training Hospital at 1 site in Turkey (Türkiye).
Trial summary
True coronary bifurcation lesions are still great of interest due to their complex anatomy, uncertainty of optimal stenting strategy and increased adverse cardiovascular outcomes. Read more about this study
- Who is it for?
- Ages 18 to 90 years
- Conditions the study is for
- Coronary Artery Disease
- What is being tested?
- double kissing nano culotte stenting
- Type of treatment
- Surgery or procedure
- How many people
- 43 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jul 2024to 30 Jul 2026
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 90 years
- All sexes
- Adult, Older adult
Study population: Patients with stable or unstable angina pectoris or patients with non-ST segment elevation myocardial infarction undergoing percutaneous coronary intervention and performing DK nano culotte stunting technique
Who may be able to join
- Patients with de novo true bifurcation lesion (Medina classification 1,1,1 or 0,1,1 or 1,0,1)
- The main vessel diameter is least 2.5 mm and the side branch diameter is at least 2.25 mm
Who cannot join
- Patients presenting with ST segment elevation myocardial infarction, cardiogenic shock and Killip class III-IV heart failure
- Patients with a history of coronary artery bypass grafting surgery
- Patients with a chronic total occlusion in the bifurcation area
- Lesions with severe calcification that needs additional intervention such as atherectomy
- Patients who are not suitable to use long term dual antiplatelet therapy and patients not participating in clinical follow-up
- Patients with hematological disorders, malignancy, end stage renal (GFR<30 ml/min) and hepatic failure
Show all 10Show fewer
- Patients with active bleeding
- Pregnant women
- Patients with life-expectancy < 1 year
- Patients treated with small open cell stent platforms
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Istanbul Mehmet Akif Ersoy Training and Research Hospital
Istanbul, 34303
About this study
Official title: A Novel Coronary Bifurcation Stenting Technique With Minimal Protrusion: Double Kissing Nano-Culotte Stenting
True coronary bifurcation lesions are still great of interest due to their complex anatomy, uncertainty of optimal stenting strategy and increased adverse cardiovascular outcomes. Provisional stenting is recommended in patients with non-complex coronary lesions while 2-stent strategies should be considered in complex coronary bifurcation lesions. However, optimal 2-stent strategy is still controversial. Double kissing (DK) crush stenting is the prominent technique in true bifurcation lesion, especially in patients with left main coronary artery disease. DK mini-culotte stenting, increasing use in clinical practice, has become popular over DK crush stenting. It was demonstrated in a bench test that stent malapposition was lower in the DK mini-culotte stenting compared to the DK crush technique. Thus, DK mini-culotte stenting may be preferred over DK crush stenting in complex true coronary bifurcation lesion. On the other hand, it was demonstrated in previous studies, less than minimal protrusion (generally called as nano protrusion) had better clinical outcomes. Kawasaki et al was first demonstrated the minimal (nano) protrusion of culotte stenting technique. Then, Toth et al revealed a novel modified culotte stenting technique named single string culotte. There was no major adverse cardiac events (MACE) in patients underwent single string stenting technique with a median follow-up period of 6±4 months. Unsurprisingly there was no MACE occurred in patients who underwent Szabo 2-stent technique. In the light of foregoing data, the least possible amount of protrusion is known to have the best results. In addition to this, double kissing balloon dilatation with culotte stenting technique seems to have better results than other stenting techniques. In our study, we aimed to evaluate the angiographic and clinical results of a novel DK Nano-Culotte stenting in coronary bifurcation lesion.
- Conditions
- Coronary Artery Disease
- Being tested
- double kissing nano culotte stenting
- Keywords
- coronary bifurcation lesion, DK nano-culotte stenting
- Medical subject headings
- Coronary Artery Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
double kissing nano culotte stentingProcedure or surgery
patients with true coronary bifurcation lesion treating with double kissing nano culotte stunting technique
| Study group | Role | What they receive |
|---|---|---|
| double kissing nano culotte stenting | Not described Receives: Procedure: double kissing nano culotte stenting |
What is being measured
The primary outcome is the main question the study is designed to answer.
MACE (major adverse cardiovascular events)
target lesion revascularization, myocardial infarction or cardiac death
Measured: 12 months
Secondary outcomes (2)
MACCE (major adverse cerebral and cardiovascular events)
all cause death, myocardial infarction, target vessel revascularization, in-stent thrombosis/restenosis or stroke
Measured: 6, 12 months
target lesion failure
target lesion revascularization, myocardial infarction, cardiac death
Measured: 6, 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jun 2022
- Study start1 Jul 2024
- Primary completion15 Jul 2026
- Study completion30 Jul 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (9)Papers the sponsor has linked to this study.
- Other trials for Coronary Artery DiseaseStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 43 participants (actual)
Sponsor and investigators
- Lead sponsor
- Istanbul Mehmet Akif Ersoy Educational and Training Hospital
- Sponsor type
- Other government
- Collaborators
- Turkish Society of Cardiology
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05406284
- Sponsor's protocol ID
- IMAEETH-3
- Status last verified
- Aug 2026
- First submitted
- 1 Jun 2022
- Last updated
- 10 Aug 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Steigen TK, Maeng M, Wiseth R, Erglis A, Kumsars I, Narbute I, Gunnes P, Mannsverk J, Meyerdierks O, Rotevatn S, Niemela M, Kervinen K, Jensen JS, Galloe A, Nikus K, Vikman S, Ravkilde J, James S, Aaroe J, Ylitalo A, Helqvist S, Sjogren I, Thayssen P, Virtanen K, Puhakka M, Airaksinen J, Lassen JF, Thuesen L; Nordic PCI Study Group. Randomized study on simple versus complex stenting of coronary artery bifurcation lesions: the Nordic bifurcation study. Circulation. 2006 Oct 31;114(18):1955-61. doi: 10.1161/CIRCULATIONAHA.106.664920. Epub 2006 Oct 23.
PubMed 17060387Colombo A, Bramucci E, Sacca S, Violini R, Lettieri C, Zanini R, Sheiban I, Paloscia L, Grube E, Schofer J, Bolognese L, Orlandi M, Niccoli G, Latib A, Airoldi F. Randomized study of the crush technique versus provisional side-branch stenting in true coronary bifurcations: the CACTUS (Coronary Bifurcations: Application of the Crushing Technique Using Sirolimus-Eluting Stents) Study. Circulation. 2009 Jan 6;119(1):71-8. doi: 10.1161/CIRCULATIONAHA.108.808402. Epub 2008 Dec 22.
PubMed 19103990Hildick-Smith D, de Belder AJ, Cooter N, Curzen NP, Clayton TC, Oldroyd KG, Bennett L, Holmberg S, Cotton JM, Glennon PE, Thomas MR, Maccarthy PA, Baumbach A, Mulvihill NT, Henderson RA, Redwood SR, Starkey IR, Stables RH. Randomized trial of simple versus complex drug-eluting stenting for bifurcation lesions: the British Bifurcation Coronary Study: old, new, and evolving strategies. Circulation. 2010 Mar 16;121(10):1235-43. doi: 10.1161/CIRCULATIONAHA.109.888297. Epub 2010 Mar 1.
PubMed 20194880Ferenc M, Gick M, Kienzle RP, Bestehorn HP, Werner KD, Comberg T, Kuebler P, Buttner HJ, Neumann FJ. Randomized trial on routine vs. provisional T-stenting in the treatment of de novo coronary bifurcation lesions. Eur Heart J. 2008 Dec;29(23):2859-67. doi: 10.1093/eurheartj/ehn455. Epub 2008 Oct 9.
PubMed 18845665Chen SL, Zhang JJ, Han Y, Kan J, Chen L, Qiu C, Jiang T, Tao L, Zeng H, Li L, Xia Y, Gao C, Santoso T, Paiboon C, Wang Y, Kwan TW, Ye F, Tian N, Liu Z, Lin S, Lu C, Wen S, Hong L, Zhang Q, Sheiban I, Xu Y, Wang L, Rab TS, Li Z, Cheng G, Cui L, Leon MB, Stone GW. Double Kissing Crush Versus Provisional Stenting for Left Main Distal Bifurcation Lesions: DKCRUSH-V Randomized Trial. J Am Coll Cardiol. 2017 Nov 28;70(21):2605-2617. doi: 10.1016/j.jacc.2017.09.1066. Epub 2017 Oct 30.
PubMed 29096915Toth GG, Sasi V, Franco D, Prassl AJ, Di Serafino L, Ng JCK, Szanto G, Schneller L, Ang HY, Plank G, Wijns W, Barbato E. Double-kissing culotte technique for coronary bifurcation stenting. EuroIntervention. 2020 Oct 9;16(9):e724-e733. doi: 10.4244/EIJ-D-20-00130.
PubMed 32338608Kawasaki T, Koga H, Serikawa T. Modified culotte stenting technique for bifurcation lesions: the cross-stenting technique. J Invasive Cardiol. 2010 May;22(5):243-6.
PubMed 20440044G Toth G, Pyxaras S, Mortier P, De Vroey F, Di Gioia G, Adjedj J, Pellicano M, Ferrara A, De Schryver T, Van Hoorebeke L, Verhegghe B, Barbato E, De Bruyne B, De Beule M, Wijns W. Single String Technique for Coronary Bifurcation Stenting: Detailed Technical Evaluation and Feasibility Analysis. JACC Cardiovasc Interv. 2015 Jun;8(7):949-59. doi: 10.1016/j.jcin.2015.01.037. Epub 2015 May 20.
PubMed 26003016Yang H, Qian J, Huang Z, Ge J. Szabo 2-stent technique for coronary bifurcation lesions: procedural and short-term outcomes. BMC Cardiovasc Disord. 2020 Jul 7;20(1):325. doi: 10.1186/s12872-020-01605-y.
PubMed 32635890
Study at a glance
From the registry record, last updated by the sponsor on 10 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Novel Coronary Bifurcation Stenting Technique With Minimal Protrusion: Double Kissing Nano-Culotte Stenting
- ClinicalTrials.gov ID
- NCT05406284
- Acronym / sponsor ID
- IMAEETH-3
- Conditions
- Coronary Artery Disease
- Keywords
- coronary bifurcation lesion, DK nano-culotte stenting
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 43 participants (actual)
- Lead sponsor
- Istanbul Mehmet Akif Ersoy Educational and Training HospitalOther government
- Collaborators
- Turkish Society of Cardiology
- Study start
- 1 Jul 2024 (actual)
- Primary completion
- 15 Jul 2026 (actual)
- Study completion
- 30 Jul 2026 (actual)
- First posted
- 6 Jun 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
True coronary bifurcation lesions are still great of interest due to their complex anatomy, uncertainty of optimal stenting strategy and increased adverse cardiovascular outcomes. Provisional stenting is recommended in patients with non-complex coronary lesions while 2-stent strategies should be considered in complex coronary bifurcation lesions. However, optimal 2-stent strategy is still controversial. Double kissing (DK) crush stenting is the prominent technique in true bifurcation lesion, especially in patients with left main coronary artery disease. DK mini-culotte stenting, increasing use in clinical practice, has become popular over DK crush stenting. It was demonstrated in a bench test that stent malapposition was lower in the DK mini-culotte stenting compared to the DK crush technique. Thus, DK mini-culotte stenting may be preferred over DK crush stenting in complex true coronary bifurcation lesion. On the other hand, it was demonstrated in previous studies, less than minimal protrusion (generally called as nano protrusion) had better clinical outcomes. Kawasaki et al was first demonstrated the minimal (nano) protrusion of culotte stenting technique. Then, Toth et al revealed a novel modified culotte stenting technique named single string culotte. There was no major adverse cardiac events (MACE) in patients underwent single string stenting technique with a median follow-up period of 6±4 months. Unsurprisingly there was no MACE occurred in patients who underwent Szabo 2-stent technique. In the light of foregoing data, the least possible amount of protrusion is known to have the best results. In addition to this, double kissing balloon dilatation with culotte stenting technique seems to have better results than other stenting techniques. In our study, we aimed to evaluate the angiographic and clinical results of a novel DK Nano-Culotte stenting in coronary bifurcation lesion.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| double kissing nano culotte stenting | – | Procedure: double kissing nano culotte stenting |
Who may qualify
- Ages
- 18 to 90 years
- Sex
- All
- Age groups
- Adult, Older adult
- Study population
- Patients with stable or unstable angina pectoris or patients with non-ST segment elevation myocardial infarction undergoing percutaneous coronary intervention and performing DK nano culotte stunting technique
Key inclusion criteria (2 listed)
- Patients with de novo true bifurcation lesion (Medina classification 1,1,1 or 0,1,1 or 1,0,1)
- The main vessel diameter is least 2.5 mm and the side branch diameter is at least 2.25 mm
Key exclusion criteria (10 listed)
- Patients presenting with ST segment elevation myocardial infarction, cardiogenic shock and Killip class III-IV heart failure
- Patients with a history of coronary artery bypass grafting surgery
- Patients with a chronic total occlusion in the bifurcation area
- Lesions with severe calcification that needs additional intervention such as atherectomy
- Patients who are not suitable to use long term dual antiplatelet therapy and patients not participating in clinical follow-up
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| double kissing nano culotte stentingpatients with true coronary bifurcation lesion treating with double kissing nano culotte stunting technique | Procedure or surgery | double kissing nano culotte stenting |
Primary outcome
MACE (major adverse cardiovascular events)
Time frame: 12 months
target lesion revascularization, myocardial infarction or cardiac death
2 secondary outcomes
MACCE (major adverse cerebral and cardiovascular events)
Time frame: 6, 12 months
target lesion failure
Time frame: 6, 12 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 10 Aug 2026.
- Background: PubMed 17060387Steigen TK, Maeng M, Wiseth R, Erglis A, Kumsars I, Narbute I, Gunnes P, Mannsverk J, Meyerdierks O, Rotevatn S, Niemela M, Kervinen K, Jensen JS, Galloe A, Nikus K, Vikman S, Ravkilde J, James S, Aaroe J, Ylitalo A, Helqvist S, Sjogren I, Thayssen P, Virtanen K, Puhakka M, Airaksinen J, Lassen JF, Thuesen L; Nordic PCI Study Group. Randomized study on simple versus complex stenting of coronary artery bifurcation lesions: the Nordic bifurcation study. Circulation. 2006 Oct 31;114(18):1955-61. doi: 10.1161/CIRCULATIONAHA.106.664920. Epub 2006 Oct 23.
- Background: PubMed 19103990Colombo A, Bramucci E, Sacca S, Violini R, Lettieri C, Zanini R, Sheiban I, Paloscia L, Grube E, Schofer J, Bolognese L, Orlandi M, Niccoli G, Latib A, Airoldi F. Randomized study of the crush technique versus provisional side-branch stenting in true coronary bifurcations: the CACTUS (Coronary Bifurcations: Application of the Crushing Technique Using Sirolimus-Eluting Stents) Study. Circulation. 2009 Jan 6;119(1):71-8. doi: 10.1161/CIRCULATIONAHA.108.808402. Epub 2008 Dec 22.
- Background: PubMed 20194880Hildick-Smith D, de Belder AJ, Cooter N, Curzen NP, Clayton TC, Oldroyd KG, Bennett L, Holmberg S, Cotton JM, Glennon PE, Thomas MR, Maccarthy PA, Baumbach A, Mulvihill NT, Henderson RA, Redwood SR, Starkey IR, Stables RH. Randomized trial of simple versus complex drug-eluting stenting for bifurcation lesions: the British Bifurcation Coronary Study: old, new, and evolving strategies. Circulation. 2010 Mar 16;121(10):1235-43. doi: 10.1161/CIRCULATIONAHA.109.888297. Epub 2010 Mar 1.
- Background: PubMed 18845665Ferenc M, Gick M, Kienzle RP, Bestehorn HP, Werner KD, Comberg T, Kuebler P, Buttner HJ, Neumann FJ. Randomized trial on routine vs. provisional T-stenting in the treatment of de novo coronary bifurcation lesions. Eur Heart J. 2008 Dec;29(23):2859-67. doi: 10.1093/eurheartj/ehn455. Epub 2008 Oct 9.
- Background: PubMed 29096915Chen SL, Zhang JJ, Han Y, Kan J, Chen L, Qiu C, Jiang T, Tao L, Zeng H, Li L, Xia Y, Gao C, Santoso T, Paiboon C, Wang Y, Kwan TW, Ye F, Tian N, Liu Z, Lin S, Lu C, Wen S, Hong L, Zhang Q, Sheiban I, Xu Y, Wang L, Rab TS, Li Z, Cheng G, Cui L, Leon MB, Stone GW. Double Kissing Crush Versus Provisional Stenting for Left Main Distal Bifurcation Lesions: DKCRUSH-V Randomized Trial. J Am Coll Cardiol. 2017 Nov 28;70(21):2605-2617. doi: 10.1016/j.jacc.2017.09.1066. Epub 2017 Oct 30.
- Background: PubMed 32338608Toth GG, Sasi V, Franco D, Prassl AJ, Di Serafino L, Ng JCK, Szanto G, Schneller L, Ang HY, Plank G, Wijns W, Barbato E. Double-kissing culotte technique for coronary bifurcation stenting. EuroIntervention. 2020 Oct 9;16(9):e724-e733. doi: 10.4244/EIJ-D-20-00130.
- Background: PubMed 20440044Kawasaki T, Koga H, Serikawa T. Modified culotte stenting technique for bifurcation lesions: the cross-stenting technique. J Invasive Cardiol. 2010 May;22(5):243-6.
- Background: PubMed 26003016G Toth G, Pyxaras S, Mortier P, De Vroey F, Di Gioia G, Adjedj J, Pellicano M, Ferrara A, De Schryver T, Van Hoorebeke L, Verhegghe B, Barbato E, De Bruyne B, De Beule M, Wijns W. Single String Technique for Coronary Bifurcation Stenting: Detailed Technical Evaluation and Feasibility Analysis. JACC Cardiovasc Interv. 2015 Jun;8(7):949-59. doi: 10.1016/j.jcin.2015.01.037. Epub 2015 May 20.
- Background: PubMed 32635890Yang H, Qian J, Huang Z, Ge J. Szabo 2-stent technique for coronary bifurcation lesions: procedural and short-term outcomes. BMC Cardiovasc Disord. 2020 Jul 7;20(1):325. doi: 10.1186/s12872-020-01605-y.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Coronary Artery Disease, run by Istanbul Mehmet Akif Ersoy Educational and Training Hospital at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 10 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
MACE (major adverse cardiovascular events) (time frame: 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05406284, which also lists 9 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 10 Aug 2026.