The PLATFORM Study: Prospective LongitudinAl Trial of FFRct: Outcome and Resource IMpacts)

HeartFlow

Status: Completed

Conditions: Coronary Artery Disease

Study type: Observational

Funder types: Other; Industry

Identifiers

NCT01943903

CP-903-003

Details and patient eligibility

About

The objective of the PLATFORM Study is to compare clinical outcomes, resource utilization, and quality of life (QOL) of FFRCT-guided evaluation versus standard practice evaluation in patients with suspected CAD in order to further inform patients, health care providers, and other stakeholders about which technologies are most effective and efficient in the diagnosis of CAD

Full description

The OVERALL OBJECTVE of this post-market, multicenter, longitudinal, prospective, consecutive cohort study is to compare clinical outcomes, resource utilization, and quality of life (QOL) in subjects receiving standard practice evaluation and treatment versus subjects receiving FFRCT-guided evaluation and treatment in subjects with suspected CAD in order to further inform patients, health care providers, and other stakeholders about which technologies are most effective and efficient in the diagnosis of CAD. Cohort 1 of this study will assess outcomes incorporating standard practice evaluation and Cohort 2 will assess outcomes incorporating FFRCT-guided evaluation. Each Cohort will be further delineated based upon initial presentation, whereas subjects presenting for initial non-invasive testing will be designated as Cohorts 1A and 2A; and subjects already referred for ICA will be designated as Cohorts 1B and 2B.

SPECIFIC OBJECTIVES for sequential cohort comparisons:

1. To compare the rate of ICA documenting non-obstructive coronary artery disease, clinical outcomes, and QOL following standard practice for diagnostic and treatment planning modalities in Cohort 1 versus incorporating FFRCT as the preferred test to guide further invasive management and medical treatment in Cohort 2;
2. To compare resource utilization following standard practice for diagnostic and treatment pathways in Cohort 1 versus incorporating FFRCT as the preferred test to guide further invasive management and medical treatment in Cohort 2;
3. To provide supporting data for generating new guidelines for diagnosis and prognosis of CAD with comparative analysis of the risk stratification with the Updated Diamond-Forrester risk model (UDF);
4. To provide society including patients, health care providers and other stakeholders with information about which diagnostic technologies are most effective and efficient in managing patients with CAD.

Enrollment: 584 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Age >18 years
• Providing written informed consent
• Subjects with intermediate likelihood of obstructive CAD with an Updated Diamond-Forrester (UDF) risk score 20-80% with symptomatic, suspected CAD who:
• In Cohort 1A & 2A only are scheduled to undergo initial clinically-indicated non-invasive coronary evaluation, and have not undergone non-invasive coronary evaluation, including exercise tolerance testing, stress echocardiography, SPECT or MRI, or cCTA, within the past 90 days OR ICA at any time; or
• In Cohort 1B & 2B only have been referred to invasive coronary angiography (ICA) and have not undergone ICA within the past 90 days
• Ability to undergo cCTA

Exclusion criteria

• Suspicion of acute coronary syndrome. Subjects experiencing unstable angina are not excluded where clinical documentation has ruled out a myocardial infarction.
• Prior, clinically documented myocardial infarction
• PCI prior to first test
• CABG prior to first test
• Contraindications for cCTA such as:
• Presence of pacemaker or internal defibrillator leads
• Atrial Fibrillation
• Known anaphylactic allergy to iodinated contrast
• Pregnancy or unknown pregnancy status in women of childbearing potential
• Body mass index >35 kg/m2
• Contraindication to acute beta blockade
• Contraindication to acute sublingual nitrate administration
• Prosthetic heart valve
• Contraindications to FFRCT
• Complex Congenital Heart disease other than anomalous coronary origins alone
• Ventricular septal defect with known Qp/Qs>1.4
• Requiring an emergent procedure within 48 hours of presentation
• Evidence of active clinical instability, including cardiogenic shock, unstable blood pressure with systolic blood pressure <90 mmHg, or NYHA Grade III or IV congestive heart failure or acute pulmonary edema
• Any active, serious, life-threatening disease with a life expectancy of less than 2 years
• Inability to comply with study follow-up requirements
• Current participation in any other clinical trial involving an investigational device or dictating care pathways at the time of enrollment.

Trial design

584 participants in 2 patient groups

Cohort 1 - Standard of Care

Description:

Subjects will be referred for non-invasive and/or invasive testing and evaluation. Prior to treatment of each subject considered for percutaneous coronary intervention (PCI) and/or coronary artery bypass grafting (CABG), the investigator and the institution's heart team will review clinical data and results of the diagnostic tests to recommend a treatment strategy, according to the institution's standard practice. Cohort 1 of the study is an observational evaluation of resource utilization and outcomes based on standard practice for diagnosis and treatment of subjects with symptomatic suspected CAD and intermediate likelihood of obstructive CAD. Subjects will be followed for one year after enrollment.

Cohort 2 - FFRCT-guided

Description:

Subjects will be referred for non-invasive and/or invasive testing and evaluation. Prior to treatment of subjects considered for PCI and/or CABG, the investigator and the institution's heart team will review the results of all available diagnostic tests, including cCTA and FFRCT, and will recommend a treatment strategy accordingly. FFRCT is a non-invasive method to evaluate the hemodynamic significance of coronary artery lesions. FFRCT calculates FFR from subject-specific cCTA data using computational fluid dynamics under rest and simulated maximal coronary hyperemic conditions. FFRCT values range between 0 and 1, and values ≤0.80 are considered hemodynamically (HD)-significant.