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Antegrade Dissection and Re-entry Versus Retrograde Strategy in CTO PCI

Antegrade Dissection and Re-entry Versus Retrograde Strategy in Chronic Total Occlusion Percutaneous Coronary Intervention

Status
Recruiting
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06878729
Acronym
ADRENALINE
Enrollment
74
Registered
2025-03-17
Start date
2025-07-28
Completion date
2028-09-30
Last updated
2026-01-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Coronary Artery Disease, Coronary Occlusion, Percutaneous Coronary Intervention

Keywords

coronary artery disease, percutaneous coronary intervention, coronary chronic total occlusion, antegrade dissection and re-entry, retrograde strategy

Brief summary

The ADRENALINE trial has been designed as a multi-center, prospective randomized study to compare the procedural and periprocedural outcomes of coronary chronic total occlusion (CTO) percutaneous coronary intervention (PCI) using antegrade dissection and re-entry (ADR) versus retrograde strategy. Beyond the patient-oriented outcomes, the influence of the studied CTO PCI strategies on the stress levels among interventional cardiologists will be explored. The main questions it aims to answer are as follows: * What is the difference between ADR versus retrograde strategy with regard to total procedure time, the rates of successful guidewire crossing and periprocedural complications as well as stress levels experienced by interventional cardiologists? * Is retrograde approach associated with higher rates of myocardial injury/infarction based on cardiac troponin/cardiac magnetic resonance (CMR) as compared with ADR? Participants will undergo pre- and postprocedural laboratory testing (cardiac troponin, CK-MB), CMR for late gadolinium enhancement and health status assessment. Subjects undergoing successful CTO PCI using antegrade wiring strategy will be included in the observational arm.

Detailed description

The ADRENALINE trial is planned as a multicenter, prospective randomized research experiment in patients with clinical indication for PCI of CTO. The target population will comprise patients with at least difficult CTO (J-CTO score ≥2) and angiographic equipoise for either ADR or the retrograde CTO recanalization strategy as evaluated by 2 independent CTO PCI operators. The pre-procedural assessment will comprise cardiac magnetic resonance (CMR) for late gadolinium enhancement, laboratory testing (cardiac troponin, creatine kinase-MB) and health status assessed by the Seattle angina questionnaire (SAQ) and the Rose Dyspnea Scale. Subsequently patients with either failed or unattempted primary antegrade wiring strategy will be evenly randomized (1:1 fashion) to either ADR or the retrograde CTO crossing strategy (n=74), while subjects undergoing successful antegrade wiring will be included in the observational arm (n=47). After CTO PCI, the cardiac troponin and creatine kinase-MB will be measured at 12 hours intervals (at least up to 24 hours), while CMR with late gadolinium enhancement will be repeated within 5 days post-procedure (including the observational arm). The health status of the study participants (SAQ and the Rose Dyspnea Scale) will be re-assessed at 3-months post-CTO PCI. In addition, to investigate the effect of the studied CTO PCI strategies on the occupational hazard of interventional cardiologists, the physical and mental stress levels experienced by CTO operators will be continuously monitored during the procedure. The co-primary endpoint is defined as: 1) total procedure time and 2) successful guidewire crossing through CTO. The secondary endpoints include: time of successful guidewire crossing through CTO, final technical success of CTO PCI, radiation dose, contrast volume, equipment cost, procedural complications, rate of periprocedural myocardial injury, rate of new myocardial infarction on CMR, quality of life, target lesion failure (cardiac death, target vessel-related myocardial infarction, and clinically-driven target lesion revascularization) at 3 months follow-up, and stress indices experienced by physicians during the procedure.

Interventions

PROCEDURECTO PCI using ADR strategy

CTO recanalization using ADR performed as primary or secondary CTO PCI strategy (i.e. in case of unattempted or failed antegrade wiring, respectively).

PROCEDURECTO PCI using retrograde strategy

CTO recanalization using retrograde approach performed as primary or secondary CTO PCI strategy (i.e. in case of unattempted or failed antegrade wiring, respectively).

Sponsors

Medical Research Agency, Poland
CollaboratorOTHER_GOV
National Institute of Cardiology, Warsaw, Poland
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Patients will be randomized to either ADR or retrograde CTO crossing strategy in a 1:1 fashion.

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* clinical indication for CTO PCI as determined by the local heart team (presence of angina or equivalent symptoms and/or documented ischemia or viability) * at least difficult native CTO lesion with J-CTO difficulty score ≥2 points on invasive angiography * angiographic suitability for both ADR and the retrograde strategy as assessed by 2 independent hybrid CTO PCI operators * informed consent for participation in the study

Exclusion criteria

* \<18 years of age * acute myocardial infarction * cardiogenic shock * severe valvular disease * estimated life expectancy \<1 year * contraindication to PCI * contrast allergy * positive pregnancy test or breast-feeding * native CTO lesion with easy or intermediate difficulty score on invasive angiography (J-CTO score \<2 points) * lack of angiographic equipoise between the ADR and the retrograde strategy as assessed by 2 independent hybrid CTO PCI operators

Design outcomes

Primary

MeasureTime frameDescription
Total procedure timeprocedural (1 day)Total procedure time in minutes.
Successful guidewire crossing through CTOprocedural (1 day)Rate of successful guidewire crossing through CTO.

Secondary

MeasureTime frameDescription
Fluoroscopy timeprocedural (1 day)Fluoroscopy time in minutes.
Radiation doseprocedural (1 day)Total radiation dose in Gy and mGycm2.
Contrast volumeprocedural (1 day)Total contrast volume in mL.
Cost of CTO PCIprocedural (1 day)Total cost of CTO PCI procedure in PLN.
Number and type of procedural complicationsprocedural (1 day)Total number and specification of procedural complications (death, non-fatal myocardial infarction, cardiac tamponade requiring pericardiocentesis, coronary perforation, stroke, major bleeding according to Bleeding Academic Research Consortium).
Periprocedural myocardial injuryin-hospital (2-5 days)Any periprocedural myocardial injury based on the dynamics of cardiac troponin.
Periprocedural myocardial infarctionin-hospital (2-5 days)Any periprocedural myocardial infarction based on the dynamics of creatine kinase-MB/cardiac troponin and according to Fourth universal definition of myocardial infarction.
Myocardial infarction on CMRin-hospital (2-5 days)Any new myocardial infarction as assessed on serial CMR with late gadolinium enhancement.
Target lesion failure3-monthsTotal number of cardiac death, target vessel-related myocardial infarction or clinically-driven target lesion revascularization.
All-cause death3-monthsAny death observed.
Cardiac death3-monthsAny cardiac death observed.
Target vessel-related myocardial infarction3-monthsAny target vessel-related myocardial infarction observed.
Technical successprocedural (1 day)Achievement of Thrombolysis In Myocardial Infarction grade 3 flow in all ≥2.5-mm distal branches with \<30% residual stenosis.
CCS class3-monthsQuality of life assessed by the Canadian Cardiovascular Society (CCS) grading scale measuring the severity of exertional angina (it uses a scale from 1 to 4 where 1 means angina only occurs with strenuous, rapid or prolonged exertion, and 4 means angina is present at rest).
SAQ score3-monthsQuality of life assessed by the Seattle Angina Questionnaire comprising a 19-item questionnaire categorized into five scales (angina frequency, angina stability, physical limitations, treatment satisfaction, and disease-specific quality of life) with each scale transformed to a 0-100 score (the higher the score, the better the quality of life).
Dyspnea severity on the Rose Dyspnea Scale3-monthsQuality of life assessed by the Rose dyspnea scale questionnaire measuring dyspnea complaints or shortness of breath (it consists of a score from 0 to 4, where 0 means no dyspnea complaints and 4 means the patient has complaints during no or minimal physical effort).
Heart rateoperator-related (1 day)Mean heart rate of the first CTO operator throughout CTO PCI.
Mean arterial pressureoperator-related (1 day)Mean arterial pressure in mmHg of the first CTO operator throughout CTO PCI.
Systolic blood pressureoperator-related (1 day)Mean systolic blood pressure in mmHg of the first CTO operator throughout CTO PCI.
Diastolic blood pressureoperator-related (1 day)Mean diastolic blood pressure in mmHg of the first CTO operator throughout CTO PCI.
Blood glucose concentrationoperator-related (1 day)Continuous blood glucose concentration monitoring in mmol/l of the first CTO operator throughout CTO PCI.
Brain activity monitoringoperator-related (1 day)Continuous brain activity monitoring via quantitative near infrared spectroscopy system assessing changes in relative concentrations of oxygenated and deoxygenated hemoglobin of the frontal cortex of the first CTO operator throughout CTO PCI.
Salivary cortisol concentrationoperator-related (1 day)Salivary cortisol concentration in ng/mL of the first CTO operator measured at 30-min intervals throughout CTO PCI.
High-sensitivity cardiac troponin concentrationoperator-related (1 day)Changes in the blood concentration of the high-sensitivity cardiac troponin (ng/L) pre- and post-CTO PCI in the first CTO operator.
Perceived Stress Scale scoreoperator-related (1 day)Stress level assessment in the first CTO operator adapted to CTO procedure and based on the Perceived Stress Scale score containing 10 questions with a 5-point answer scale ranging from 0 ('never') to 4 ('very often') - the minimum score is 0 (indicating no stress) and the maximum score is 40 (indicating the highest level of stress).
Clinically-driven target lesion revascularization3-monthsAny clinically-driven target lesion revascularization observed.
Time of successful guidewire crossingprocedural (1 day)Time of successful guidewire crossing through CTO in minutes defined as the time from starting ADR or the retrograde approach to the time of successful CTO recanalization using any technique.

Countries

Poland

Contacts

Primary ContactKatarzyna Istynowicz
kistynowicz@ikard.pl0048223434268
Backup ContactWioletta Antos
wantos@ikard.pl0048223434268

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 13, 2026