Pivotal, Single-arm Clinical Trial to Assess the Efficacy and Safety of the MedHub AutocathFFR Software Device (AutocathFFR)

Pivotal, Single-arm Clinical Trial (Prospective Analysis of Retrospective Data) to Assess the Efficacy and Safety of the MedHub AutocathFFR Software Device in Measuring FFR From Digital Angiography Images as a Supportive Aid in the Evaluation and Assessment of Hemodynamically Significant Coronary Artery Disease

Prospective (analysis of retrospective data), multi-center, observational, single-arm study. This structure was selected as the "worst case" due to the fact that it represents real life usage of invasive FFR measurement is performed mostly in "gray zone" cases, which are that their severity cannot be determined intuitively and based on the physician eyeball. By using real-world historical data of invasive FFR, the analysis of the obtained data can ensure that the study results are expected to include invasive FFR results that are in the grey zone, when invasive FFR is used in real life and represent the real expected use of the product. Furthermore, the analysis of the data obtained in the studies with these similar devices measuring FFR obtained from angiograms was actually performed in a retrospective manner. That is, although the angiographic images and pressure wire recordings were obtained in real-time, due to the need to mark the vessel in real-time and obtain specific projections during the procedure without which the FFR cannot be calculated, the primary endpoint (sensitivity and specificity) and accuracy were determined in all studies by a post-hoc review by a similar independent QCA core laboratory. The invasive FFR data, as well as the software generated FFR data were reviewed post-hoc by a core laboratory or even at the company.

Study Overview

• Status: Completed
• Conditions: Stable Angina; Unstable Angina; NSTEMI
• Intervention / Treatment: Other: Collecting invasive FFR measurements.

Detailed Description

The proposed study is designed to compare MedHub AutocathFFR measurements obtained from angiograms for the non-invasive determination of the presence of hemodynamically significant coronary lesions. The software device will run on angiograms generated during cardiac catheterization and results will be compared to invasive FFR measurements.

The study is a prospective (analysis of retrospective data), multi-center, observational, single-arm, study.

A total of 308 cases will be enrolled in the study. The study population who represent the target population for this procedure consists of subjects with stable angina, unstable angina or NSTEM1 who underwent a clinically indicated invasive coronary angiography and for whom invasive FFR have been measured in vessels with coronary lesions. For each lesion of interest, a minimum of two 2D angiographic projections, will be obtained. Patients of both genders, all ethnicities, >18 years of age will be recruited to the study. Study cases will be sourced from numerous hospitals in the United States and Israel.

Investigators will screen cases based on the inclusion/exclusion criteria described below. General patient demographics, medical history, concomitant medications, C-arm angiography system used, FFR pressure wire used, etc., will be obtained for each study case.

Subjects with known or suspected coronary artery disease who were scheduled for clinically indicated invasive coronary angiography (ICA) and on whom invasive FFR has been measured in vessels with coronary lesions will comprise the patient population. Coronary angiography will have been performed in a routine fashion in patients with suspected coronary artery disease. When clinically indicated, invasive FFR will have been measured in vessels with coronary lesions of varying severity using a coronary pressure wire and hyperemic stimulus.

The patient's angiographic images will be sent to an independent Quantitative Coronary Arteriography (QCA) Core Laboratory, where they will be processed using the MedHub AutocathFFR device, by independent potential users of the device (i.e., interventional cardiologists). The users will use the diagnostic angiograms and upload them to the AutocathFFR device, to generate the AutocathFFR value. The independent users will be blinded to the software device-generated FFR results and to the invasive FFR measurements. Blinding will be employed in the study because the primary endpoint, i.e., the scored FFR measurements per vessel are subject to bias by device users. Observations in patients with more than 1 study vessel will be presumed independent. The AutocathFFR will not be used for diagnostic or clinical decisions. A detailed standard operating procedure (SOP) for AutoCathFFR computation will be provided to the QCA Core Laboratory.

The AutocathFFR device automatically suggests and marks locations of suspicious narrowing and computes an FFR value for each detected area. The clinician can also select and mark manually locations with suspected narrowing for computing of FFR value. The clinical performance of AutocathFFR device depends only on the uploaded angiograms, on which the AutocathFFR results are presented alongside the viewed blood vessel. There is no need for user interaction with the system during the diagnostic angiography procedure. For example, there is no need to take specific orthogonal projection nor to designate or mark the blood vessels or segments. When the desired coronary artery is viewed on the Cath Lab monitor, the AutocathFFR measurement is automatically shown alongside the viewed vessel, if an area of narrowing is identified in the vessel. Therefore, the use of the AutocathFFR device is seamless with the angiographic imaging procedure and does not require any additional intervention by the cardiologist.

• Study Type: Observational
• Enrollment (Actual): 308

Contacts and Locations

Study Locations

• Israel
  • Central District
    • Hadera, Central District, Israel
      • Hillel Yaffe Medical Center
  • North
    • Haifa, North, Israel
      • Rambam Medical Center
  • South
    • Be'er Sheva, South, Israel
      • Soroka Medical Center

Participation Criteria

Eligibility Criteria

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

• Sampling Method: Probability Sample

Study Population

C-Arm images from adult subjects with stable angina, unstable angina or NSTEM1 who underwent a clinically indicated invasive coronary angiography and on whom invasive FFR has been measured in vessels with coronary lesions.

Description

Inclusion Criteria:

patient specific:

• Age > 18 years.
• Subjects with stable angina pectoris, unstable angina pectoris or NSTEM1 and in whom invasive FFR was performed to assess a non-culprit stenosis in at least one coronary artery.

Angiographic:

• Subject underwent a clinically indicated Invasive Coronary Angiogram (ICA).
• Subject underwent invasive FFR with IV or intracoronary Adenosine, Adenosine Triphosphate (ATP) or Papaverine used as hyperemic stimulus.

Exclusion Criteria:

Patient Specific:

• Angiogram not obtained on an FDA cleared C-Arm angiography system.
• Invasive FFR not obtained on an FDA cleared FFR catheter tip pressure transducer (a.k.a. pressure wire).
• Vessel size less than 2 mm.
• Subject presents with an acute infarct (STEM1) OR has documented prior STEMI on same side (right/left).
• CTO in target vessel.
• Prior CABG, heart transplant or valve surgery, prior TAVI/TAVR or severe left sided valvular disease.
• Known LVEF ≤45%.
• Arteries supplying akinetic or severe hypokinetic territories if already known based on prior imaging.
• TIMI Grade 2 or lower at baseline.
• Target lesion involves Left Main (stenosis >50%).
• PCI with stent in target vessel in past 12 months, or target vessel involves in-stent restenosis.
• Severe, diffuse disease defined as the presence of diffuse, serial gross luminal irregularities present in the majority of the coronary tree.
• Target coronary vessel provides collaterals to a chronically occluded vessel.

Angiographic:

• Coronary angiography was performed per standard of care at a cine frame rate of at least 7 frames per second.
• Presence of aortic damping.
• Distortion of the waveform.
• A minimum of two different angiographic views for each lesion of interest in the Left Circumflex Artery (LCX), Left Descending Artery (LAD) and in the Right Circumflex Artery (RCA).
• Lesion is not clearly visible.

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
adult subjects who underwent a clinically indicated invasive coronary angiography; adult subjects with stable angina, unstable angina or NSTEM1 who underwent a clinically indicated invasive coronary angiography and on whom invasive FFR has been measured in vessels with coronary lesions.	Other: Collecting invasive FFR measurements.; Invasive FFR measurements from the patient's hospital records will be collected.; Other Names: data collection

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Evaluate the sensitivity and specificity of AutoCathFFR	Co-primary endpoints are the sensitivity and specificity of the dichotomously scored AutocathFFR per vessel compared to the gold standard, invasive FFR measurements, where an FFR ≤ 0.80 is scored "positive" and an FFR > 0.80 is considered "negative".	Up to 2 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To assess the accuracy	To assess the accuracy, positive predictive value and negative predictive value and per lesion of the AutocathFFR in correctly diagnosing both positive, as well as negative hemodynamically significant coronary stenosis, using the invasive FFR as the reference standard.	Up to 2 months
To assess the corelation bwtween invasive FFR and AutoCathFFR	To assess continuously scored AutocathFFR overall correlation with the invasive FFR measurements	Up to 2 months
To assess the sensitivity and specificity	To assess the sensitivity and specificity of the dichotomously scored AutocathFFR index per lesion.	Up to 2 months
To assess device success rate	To assess device success, measured as the ratio of completed versus initiated AutocathFFR index calculations.	Up to 2 months
To assess the Usability of the AutocathFFR	To assess the Usability of the AutocathFFR device, as evaluated using a questionnaire focusing on ease of use and intuitiveness of the system, to be completed by the user (i.e., interventional cardiologists).	Up to 2 months
Comprehensiveness of the User Manual	Comprehensiveness of the User Manual, to be rated using a questionnaire completed by the user (i.e., interventional cardiologists in the QCA Core Lab)	Up to 2 months
Device-related adverse events/malfunction	Device-related adverse events/malfunction	Up to 2 months

Collaborators and Investigators

• Sponsor: Medhub Ltd.

Study record dates

Study Major Dates

• Study Start (Actual): May 9, 2021
• Primary Completion (Actual): October 30, 2021
• Study Completion (Actual): December 31, 2021

Study Registration Dates

• First Submitted: April 21, 2021
• First Submitted That Met QC Criteria: April 25, 2021
• First Posted (Actual): April 27, 2021

Study Record Updates

• Last Update Posted (Actual): March 26, 2024
• Last Update Submitted That Met QC Criteria: March 24, 2024
• Last Verified: March 1, 2024

More Information

Terms related to this study

• Keywords: coronary angiography
• Additional Relevant MeSH Terms: Myocardial Ischemia; Heart Diseases; Cardiovascular Diseases; Vascular Diseases; Pain; Neurologic Manifestations; Chest Pain; Angina Pectoris; Angina, Stable; Angina, Unstable
• Other Study ID Numbers: CLN-FFR-002

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No