The FAVOR V AMI Trial

Study Overview
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Brief Summary
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The FAVOR V AMI study is a prospective, multicenter, blinded, randomized, sham-controlled trial comparing the long-term clinical outcomes of the Functional and Angiography-derived Strain inTegration (FAST) technique (next-generation quantitative flow ratio [μQFR] and radial wall strain [RWS]) guided percutaneous coronary intervention (PCI) strategy, with standard treatment strategy, in patients with ST-segment elevation myocardial infarction (STEMI) and multivessel coronary disease (MVD).

Detailed Description
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The FAVOR V AMI study is a prospective, multicenter, blinded, randomized, sham-controlled trial comparing the long-term clinical outcome of the two PCI strategies, the FAST guided strategy (test group) versus standard treatment strategy (control group), in a high-risk population with STEMI and MVD who underwent successful primary PCI of the infarct-related artery. The primary endpoint is major adverse cardiac events (MACE), defined as a composite of all-cause death, myocardial infarction (MI), or ischemia-driven revascularization when the last patient reaches 6-month follow-up. The major secondary endpoint is cardiovascular death and MI when at least 395 total events have accrued. The study hypothesis is the FAST (μQFR+RWS) guided PCI strategy is superior to a standard treatment strategy by the primary and major secondary endpoint. For the patients randomized to μQFR+RWS group, μQFR will be measured in all non-infarct related arteries containing any non-culprit lesion with visually-assessed percentage diameter stenosis (DS%) ≥50% and ≤90% with reference vessel diameter (RVD) ≥2.5 mm. If μQFR ≤0.80 or RWS ≥13%, PCI will be performed; if μQFR >0.80 and RWS <13%, the procedure will deferral; if DS% >90%, PCI should be performed without the need of μQFR or RWS. For all patients undergoing PCI, post-PCI μQFR measurement is recommended; if μQFR <0.90, if the reason is obvious post-dilation with a non-compliant balloon or bail-out stenting should be considered; if the reason is not obvious intravascular imaging should be considered. For the patients randomized to standard treatment group, PCI should be performed of all non-culprit lesions with visual DS% ≥70% in all non-infarct related arteries with RVD ≥2.5 mm; for a non-culprit lesion with visually DS% 50-70%, PCI can be performed if fractional flow reserve (FFR) ≤0.80 or instantaneous wave-free ratio (iFR) ≤0.89. All patients will be followed by either telephone or clinic visit at 1 month, 6 months,1 year, 2 years, 3 years, 4 years and 5 years. The sample size will be about 5,000 using an event-driven sample calculation. An adaptive design will be implemented for sample size re-estimation when 90% of patients have been enrolled. All principal analyses will take place in the intention-to-treat (ITT) population. The primary and major secondary endpoints will be analyzed in prespecified subgroups, including age (≥65 vs. <65), sex (men vs. women), diabetes (yes vs. no), time from symptom onset to primary PCI (≤ vs. > median), planned number of NCLs for PCI in the control arm (0/1 vs. 2 vs. 3), infarct related artery (LM/LAD vs, others), untreated CTOs with RVD ≥2.5 mm in non-infarct related artery (yes vs. no), timing of elective PCI (same hospitalization as the emergency PCI vs. during an elective readmission), P2Y12 inhibitor therapy (Clopidogrel vs. Ticagrelor), treatment of any non-infarct lesion with DS >90% prior to randomization (yes vs. no), LVEF (echo post primary PCI, prior to randomization) (>40% vs. ≤40%), Killip Class (I vs. ≥II), lesion location of non-culprit lesion (LM/LAD vs. others), diseased vessels (two-vessel disease vs. LM/three-vessel disease), moderate or severe calcification in any NCL (yes vs. no), bifurcation lesion with planned main vessel and SB treatment in any NCL (yes vs. no), intravascular guidance during the randomized procedure (yes vs. no), μQFR grayzone (μQFR < 0.75 vs. = 0.75-0.85 vs. > 0.85 [by core laboratory]), μQFR-based functional SYNTAX score (FSSQFR, low tertile vs. mid tertile vs. high tertile [by core laboratory]), post-PCI μQFR (≥0.90 vs. <0.90 [by core laboratory]), angiography-derived IMR (≥2.5 mmHgs/cm vs. <2.5 mmHgs/cm [by core laboratory]), residual physiology pattern (PPG diffuse vs. local [by core laboratory]), μQFR-based residual functional SYNTAX score (rFSSQFR, 0 vs. ≥ 1 [by core laboratory]), learning experience of μQFR/RWS (first half vs. second half of enrolled cases in each center).

Official Title
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Functional and Angiography-Derived Strain Guided Multi-Vessel/Lesion Revascularization Strategy in Patients With Acute ST-Segment Elevation Myocardial Infarction (FAVOR V AMI)

Conditions
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ST-Segment Elevation Myocardial Infarction, Multivessel Coronary Artery Disease, Percutaneous Coronary Intervention

Intervention / Treatment
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* Diagnostic Test: FAST Technique
* Diagnostic Test: Angiography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: General inclusion Age ≥18 years STEMI ≤30d Successful primary PCI of all culprit lesion(s) responsible for the STEMI (visually-assessed residual stenosis <30% in stent-treated lesions or <50% in DCB-treated or PTCA-treated lesions, with TIMI-3 flow in all treated vessels) No MACE event between the index PCI and the staged randomized procedure Able to understand the trial design and provide written informed consent Angiographic inclusion: The presence of at least 1 non-culprit lesion with DS% 50%-90% in any non-infarct related artery with RVD ≥2.5 mm by visual assessment Non-culprit lesions are potentially eligible for PCI Note: All lesions in the infarct related arteries with DS ≥70% and RVD ≥2.5 mm by visual assessment must be successfully treated either during the index primary PCI or the staged procedure prior to randomization Note: There may also be 1 or more NCL with DS% >90% (including a CTO) as long as there is at least 1 NCL with DS% 50%-90% as above. Any such lesions in which PCI is intended must be treated successfully either during the index primary PCI or the staged procedure prior to randomization. Exclusion Criteria: General exclusion Cardiogenic shock or refractory hypotension (Killip IV) On pressors or use of or need for intra-aortic balloon pump or other mechanical circulatory support devices Intubated Prior thrombolytic therapy for this admission Cockcroft-Gault-calculated CrCl <30 ml/kg Pregnant or woman of child-bearing potential Life expectancy less than 1 year for non-cardiac causes Allergy to iodine-containing contrast agents which cannot be adequately premedicated Unable to tolerate DAPT for at least 6 months Prior CABG or planned CABG Any planned surgery within 6 months Any condition that may interfere with any follow-up procedures (e.g. dementia, drug use) Angiographic exclusion Poor angiographic image quality precluding vessel contour detection or with suboptimal contrast opacification, branch ostium cannot be shown clearly, severe overlap in the stenosed segment or severe tortuosity of any interrogated vessel deemed not amenable to μQFR or RWS measurement Unable to judge culprit lesion or infarct-related artery according to current evidence

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: FAST Guided Strategy (μQFR+RWS)<br>μQFR is measured in all non-infarct related arteries containing any non-culprit lesion with visually-assessed DS% ≥50% and ≤90% with RVD ≥2.5 mm. μQFR ≤0.80: PCI RWS ≥13%: PCI μQFR >0.80 and RWS <13%: Deferral DS% >90%: PCI without the need of μQFR or RWS For all patients undergoing PCI, post-PCI μQFR measurement is recommended; if μQFR <0.90, if the reason is obvious post-dilation with a non-compliant balloon or bail-out stenting should be considered; if the reason is not obvious intravascular imaging should be considered. | Diagnostic Test: FAST Technique<br>* The next-generation QFR (μQFR) introduces a more intelligent algorithm and supports single-projection rapid calculation with a diagnostic accuracy of 93.0% compared with FFR; Computational RWS technique facilitates the assessment of lesion vulnerability.<br>* Other names: The next-generation quantitative flow ratio and radial wall strain;Diagnostic Test: Angiography<br>* Coronary angiography is a procedure that uses contrast under x-ray pictures to detect stenosis in the coronary arteries.<br>* Other names: Coronary angiography;|
| Sham Comparator: Standard Treatment Strategy<br>PCI should be performed of all non-culprit lesions with visual DS% ≥70% in all non-infarct related arteries with RVD ≥2.5 mm; For a non-culprit lesion with visually DS% 50-70%, PCI can be performed if FFR ≤0.80 or iFR ≤0.89. | Diagnostic Test: Angiography<br>* Coronary angiography is a procedure that uses contrast under x-ray pictures to detect stenosis in the coronary arteries.<br>* Other names: Coronary angiography;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of major adverse cardiac events (MACE) | Defined as a composite of all-cause death, myocardial infarction (MI), or ischemia-driven revascularization | From the date of first randomization until a total number of 395 events of MACE is reached (median follow-up of approximately 1.5 years) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of cardiovascular death and MI (Major secondary endpoint） | Defined as a composite of cardiovascular death and MI | From the date of first randomization until a total number of 395 events of cardiovascular death and MI is reached (median follow-up of approximately 3 years) | 
| Rate of lesion success | Defined as: 1) angiographic success (core laboratory-assessed residual stenosis <30% in stent-treated lesions or <50% in DCB-treated or PTCA-treated lesions, with TIMI-3 flow in the treated vessel); and 2) physiological success (post-PCI μQFR ≥0.80 assessed by core lab) | Immediately post the PCI procedure | 
| Rate of procedural success | Defined as lesion success in all treated lesions without in-hospital MACE | Maximum of 7 days | 
| Incidence of death | Including cardiovascular, non-cardiovascular or undetermined | 30 days, 6 months, 1 year, 2 years, 3 years, 4 years, 5 years | 
| Incidence of all MI | Including periprocedural MI (SCAI definition) and spontaneous MI (target vessel-related or non-target vessel-related, culprit lesion-related or non-culprit lesion-related) | 30 days, 6 months, 1 year, 2 years, 3 years, 4 years, 5 years | 
| Incidence of any revascularization | Including ischemia-driven or non-ischemia driven, target vessel-related or non-target vessel-related, culprit lesion-related or non-culprit lesion-related | 30 days, 6 months, 1 year, 2 years, 3 years, 4 years, 5 years | 
| Incidence of definite/probable stent thrombosis (ARC-2) | By ARC-2 definition and including acute, subacute, late and very late stent thrombosis | 30 days, 6 months, 1 year, 2 years, 3 years, 4 years, 5 years | 
| Angina status evaluation | As assessed by the Seattle Angina Questionnaire (SAQ) | 6 months, 1 year, 3 years, 5 years | 
| Health-related quality of life evaluation | As assessed by the European Quality of Life-5 Dimensions (EQ-5D) | 6 months, 1 year, 3 years, 5 years | 
| Cost-effectiveness evaluation | As assessed by the Incremental cost effectiveness ratio (ICER) using the composite endpoint (including myocardial infarction, any revascularization, stent thrombosis, cerebrovascular and major bleeding events) | 6 months, 1 year, 3 years, 5 years | 
| Cost-utility evaluation | As assessed by the Incremental cost-utility ratio (ICUR) using quality-adjusted life years (QALYs) | 6 months, 1 year, 3 years, 5 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Radial Wall Strain, Quantitative Flow Ratio, ST-Segment Elevation Myocardial Infarction, Multivessel Coronary Artery Disease, Percutaneous Coronary Intervention