The PRECISE Protocol: Prospective Randomized Trial of the Optimal Evaluation of Cardiac Symptoms and Revascularization

Not Applicable

Completed

Conditions: Coronary Artery Disease

Interventions: Diagnostic Test: cCTA with selective FFRct

Registration Number: NCT03702244

Lead Sponsor: HeartFlow, Inc.

Brief Summary: The study will be a prospective, pragmatic, randomized clinical trial of the comparative effectiveness of diagnostic evaluation strategies for stable CAD, to be performed in outpatient settings, including primary care and cardiology practices.

Detailed Description: Objective was to test a modified initial cCTA strategy (PS) designed to improve clinical efficiency vs usual testing (UT). Patients from 65 North American and European sites with stable symptoms of suspected coronary artery disease (CAD) and no prior testing were randomly assigned 1:1 to precision strategy PS or UT. PS incorporated the Prospective Multicenter Imaging Study for the Evaluation of Chest Pain (PROMISE) minimal risk score to quantitatively select minimal-risk participants for deferred testing, assigning all others to cCTA with selective CT-derived fractional flow reserve (FFR-CT). UT included site-selected stress testing or catheterization. Site clinicians determined subsequent care.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 2103

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Precision evaluation	cCTA with selective FFRct	Participants randomized to a precision strategy will be assigned to either guideline-recommended care without immediately planned testing (low risk) or cCTA with selective FFRct (elevated risk) using a risk tool based on pretest clinical characteristics derived from the PROMISE trial and validated in SCOT-HEART trial. Participants assigned to guideline-recommended care without planned testing will be treated with preventive and antianginal medical treatment per guideline recommendations and clinical judgment and followed without testing.

Primary Outcome Measures

Name	Time	Method
Primary Composite (Number) of Deaths / MIs / Invasive Coronary Angiography Without Obstructive Disease	1 year	The centrally adjudicated (by Clinical Events Committee) primary end point was a composite of clinical efficiency as a gatekeeper to invasive testing (catheterization without obstructive CAD) and safety (death, non fatal myocardial infarction \[MI\]) at 1 year. Invasive cardiac catheterization without obstructive coronary artery disease defined as the absence of any ≥50% stenosis or hemodynamic indication of significance (no FFR ≤0.80 or iFR≤0.89) in any major epicardial vessel including side branches ≥2 mm in diameter, as determined by core-lab adjudicated quantitative coronary angiography (QCA) or if QCA not performed, by site report. A detailed description and information on the definitions of primary endpoint component definitions is provided in the current version of the study Protocol, Statistical Analysis Plan, and the published trial design article.

Secondary Outcome Measures

Name	Time	Method
Number of Unplanned Hospitalizations (Including Admissions With Death or MI)	1 year	Urgent and unscheduled hospitalizations for cardiovascular causes include hospitalization for ischemic heart disease including myocardial infarction and unstable angina, cerebrovascular disease including stroke and TIA, heart failure, acute and/or critical limb ischemia, other thrombotic events including pulmonary embolism, arrhythmias, cardiac arrest and other clear cardiovascular causes for hospitalization that do not meet the criteria for the specific events listed here (e.g., hospitalization for acute cardiac chest pain that does not meet the criteria for MI or UA).
Number of Participants With Quality of Life (Angina Frequency) Assessment	1 year	Overall health status was assessed briefly using the EQ-5D-5L, a standardized generic measure that can also be used to link specific health states to general population-based utilities. The EQ-5D-5L consists of two parts: (1) a descriptive assessment of five dimensions (mobility, self-care, usual activities, pain/discomfort, anxiety/depression), each of which can take one of five responses corresponding to the level of severity within each dimension, and (2) a self-rating 0- 100 "thermometer" of current health-related quality of life. The proportion of participants with frequent angina (Seattle Angina Questionnaire angina frequency score \<80).
Cumulative Radiation Exposure From All Cardiovascular Procedures (12 M), MilliSievert (mSv)	1 year	The cumulative radiation exposure over the 12 months following Randomization was calculated based on each participant's exposure to radiation for cardiovascular care. If data are missing in \> 80% or more of the diagnostic and procedural testing, a single fixed estimate of radiation based on the literature will be used to impute. Given high missingness in catheterization data, a fixed estimate of 6.6 mSv and 4.1 mSv was used for catheterization with and without revascularization, respectively, based on recent trial data.
Number of Participants With Preventive Medication Use	1 Year	Lipid-lowering agents included statins, ezetimibe, PCSK9 inhibitors. Antiplatelet agents included aspirin, clopidogrel, ticagrelor, or prasugrel. Antihypertensive medications included calcium channel blockers, angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, angiotensin-neprilysin inhibitor, beta blockers, nitrates, or diuretics.
Number of Catheterization and Revascularization Procedures	1 year	Catheterization efficiency was defined as the proportion of invasive cardiac catheterization patients who undergo revascularization (PCI or CABG) within 6 months. Revascularization may occur either percutaneously (PCI) or surgically (CABG) or as hybrid (PCI and CABG). For PCI, any intervention on a lesion in the coronary tree (including angioplasty, stenting, intravascular lithotripsy) whether successful or not will be considered a revascularization. For CABG the start of the surgical procedure (skin incision) was considered as CABG, whether the procedure was successful or not. Staged revascularization was considered as one revascularization event.