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

Prospective LongitudinAl Trial of FFRct: Outcome and Resource IMpacts

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

Study Overview

• Status: Completed
• Conditions: Coronary Artery Disease

Detailed 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.

• Study Type: Observational
• Enrollment (Actual): 584

Contacts and Locations

Study Locations

• Austria
  • Graz, Austria, A-8020
    • LKH-GRAZ-West - Department of Cardiology
  • Innsbruck, Austria, A-6020
    • Innsbruck Medical University, Department of Radiology II
• Belgium
  • Aalst, Belgium
    • Cardiovascular Center Aalst
• Denmark
  • Aarhus, Denmark, 8200
    • Aarhus University Hospital Skejby
• France
  • Brest, France, 29609
    • CHU Brest - Hopital de Cardiologie
  • Lyon, France, 69677
    • Cardiovascular Hospital -Interventional Cardiology Dept, Hospices Civils de Lyon and Claude Bernard University France
• Germany
  • Leipzig, Germany, 04289
    • Heart Center Leipzig GmbH
  • Mainz, Germany, 55131
    • Universitätsmedizin der Johannes Gutenberg-Universität Mainz
  • Munich, Germany, 80636
    • Deutsches Herzzentrum München - ISAResearch Centre
• Italy
  • Milan, Italy, 20154
    • Centro Cardiologico Monzino
• United Kingdom
  • Newcastle upon Tyne, United Kingdom, NE7 7DN
    • Freeman Hospital - Therapeutics & Cardiac Research Team
  • Southampton, United Kingdom, SO16 6YD
    • University Hospital Southampton NHS Foundation Trust
• United States
  • California
    • Redwood City, California, United States, 94063
      • HeartFlow, Inc
    • Stanford, California, United States, 94305
      • Stanford University
  • North Carolina
    • Durham, North Carolina, United States, 27705
      • Duke University Clinical Research Institution

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Subjects referred with intermediate likelihood of obstructive CAD with an Updated Diamond-Forrester (UDF) risk score 20-80% with symptomatic, suspected CAD

Description

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.

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort
Cohort 1 - Standard of Care; 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; 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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Rate of negative invasive coronary angiography	The primary endpoint of the PLATFORM Study is 90 day (+30/-15 days) rate of coronary angiogram showing no stenosis > 50% in a vessel > 2.0 mm by Quantitative Coronary Angiography (QCA), or no invasively-measured FFR < 0.80 in a segment distal to a stenosis in a vessel > 2.0 mm by QCA between Cohort 1 and 2.	90 Days from first test

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
MACE	90 days (+30/-15 days) Cohort 1 and Cohort 2 Major Adverse Coronary Event (MACE) rates, defined as: All cause death; Non-fatal MI; Unplanned hospitalization for acute coronary syndrome (ACS) leading to urgent revascularization	90 days from first test
Resource Utilization at 90 Days	Comparison of Resource utilization between cohort 1 and cohort 2 at 90 days (+30/-15 days), a composite from regional standard costs (in Euro) of: Invasive diagnostic and therapeutic coronary procedures; Targeted medication use; Treatment of MACE Events; Noninvasive cardiac testing; Treatment of vascular events related to invasive diagnostic or therapeutic coronary procedures, occurring within 14 days of invasive procedure	90 days from first test
Resource Utilization at 180 Days	Comparison of Resource utilization between cohort 1 and cohort 2 at 180 days (+/- 30 days), a composite from regional standard costs (in Euro) of: Invasive diagnostic and therapeutic coronary procedures; Targeted medication use; Treatment of MACE Events; Noninvasive cardiac testing; Treatment of vascular events related to invasive diagnostic or therapeutic coronary procedures, occurring within 14 days of invasive procedure	180 days from first test
Resource Utilization at 365 Days	Comparison of Resource utilization between cohort 1 and cohort 2 at 365 days (+/- 30 days), a composite from regional standard costs (in Euro) of: Invasive diagnostic and therapeutic coronary procedures; Targeted medication use; Treatment of MACE Events; Noninvasive cardiac testing; Treatment of vascular events related to invasive diagnostic or therapeutic coronary procedures, occurring within 14 days of invasive procedure	365 days from first test

Collaborators and Investigators

• Sponsor: HeartFlow, Inc.
• Collaborators: Duke Clinical Research Institute
• Investigators: Principal Investigator: Gianluca Pontone, MD, Centro Cardiologico Monzino; Principal Investigator: Pamela Douglas, MD, Duke University; Principal Investigator: Bernard de Bruyne, MD, PHD, Cardiovascular Center Aalst; Principal Investigator: Mark Hlatky, MD, Stanford University

Publications and helpful links

General Publications

• Douglas PS, De Bruyne B, Pontone G, Patel MR, Norgaard BL, Byrne RA, Curzen N, Purcell I, Gutberlet M, Rioufol G, Hink U, Schuchlenz HW, Feuchtner G, Gilard M, Andreini D, Jensen JM, Hadamitzky M, Chiswell K, Cyr D, Wilk A, Wang F, Rogers C, Hlatky MA; PLATFORM Investigators. 1-Year Outcomes of FFRCT-Guided Care in Patients With Suspected Coronary Disease: The PLATFORM Study. J Am Coll Cardiol. 2016 Aug 2;68(5):435-445. doi: 10.1016/j.jacc.2016.05.057.
• Hlatky MA, De Bruyne B, Pontone G, Patel MR, Norgaard BL, Byrne RA, Curzen N, Purcell I, Gutberlet M, Rioufol G, Hink U, Schuchlenz HW, Feuchtner G, Gilard M, Andreini D, Jensen JM, Hadamitzky M, Wilk A, Wang F, Rogers C, Douglas PS; PLATFORM Investigators. Quality-of-Life and Economic Outcomes of Assessing Fractional Flow Reserve With Computed Tomography Angiography: PLATFORM. J Am Coll Cardiol. 2015 Dec 1;66(21):2315-2323. doi: 10.1016/j.jacc.2015.09.051. Epub 2015 Oct 14.

Study record dates

Study Major Dates

• Study Start: September 1, 2013
• Primary Completion (Actual): December 1, 2015
• Study Completion (Actual): December 1, 2015

Study Registration Dates

• First Submitted: September 10, 2013
• First Submitted That Met QC Criteria: September 12, 2013
• First Posted (Estimate): September 17, 2013

Study Record Updates

• Last Update Posted (Estimate): March 23, 2016
• Last Update Submitted That Met QC Criteria: March 21, 2016
• Last Verified: March 1, 2016

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Myocardial Ischemia; Heart Diseases; Cardiovascular Diseases; Vascular Diseases; Arteriosclerosis; Arterial Occlusive Diseases; Coronary Disease; Coronary Artery Disease
• Other Study ID Numbers: CP-903-003