Ammonia N-13 Myocardial Blood Flow Absolute Quantification by PET in Patients With Known or Suspected CAD (Ammonia MAP)

Coronary Artery Disease Clinical Trial

Official title:

Ammonia N-13 Myocardial Blood Flow Absolute Quantification by Positron Emission Tomography in Patients With Known or Suspected Coronary Artery Disease (Ammonia MAP)

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT04343209
• Other study ID #: Pro00042364
• Status: Recruiting
• Start date: September 14, 2020
• Est. completion date: August 2024

Study information

• Verified date: July 2023
• Source: Ionetix Corporation
• Contact: Joe Oliverio
• Phone: 716-550-0435
• Email: regulatoryaffairs[@]ionetix.com
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

This study is being conducted to provide access to and collect test data for an established nuclear medicine diagnostic imaging test called Positron Emission Tomography (PET), using a specific radioactive drug called Ammonia N-13 (Ammonia), referred to simply as an Ammonia PET scan, which is used to visualize the blood flow through the blood vessels and into the heart muscle in order to identify areas of restricted blood flow within the heart. The scanner used in this study may be a stand-alone PET scanner or a PET/CT scanner, which combines the PET scanner and a Computed Tomography (CT) scanner into a single device. Unless otherwise stated in this consent form, the term PET will be used to refer to both stand-alone PET and PET/CT scanners. While physicians have used the Ammonia PET test for many years to visualize (image) the blood flow into the heart muscle (perfusion), it is now possible to also measure the flow of blood into the heart muscle. Research studies have demonstrated clinical value in reviewing the measured blood flow values in addition to reviewing the perfusion images of blood flow into the heart muscle. Therefore, this study will establish a database of a large number of Ammonia PET measured blood flow values to serve as a future reference.

Description:

This is a prospective, multicenter database that will be populated by sites utilizing N-13 Ammonia and sponsored by Ionetix. Each site with access to N-13 produced under an investigational new drug (IND) application will be eligible to participate. Once the site is activated, the site will enroll patients into the database that are scheduled for clinically indicated PET-MPI with N-13 (as determined by their treating physicians). PET-MPI perfusion, MBF, percent ischemia, pharmacologic stress agent, and gated left ventricular ejection fraction/function values will be collected when available, in an anonymous fashion and uploaded into the database. All patient health identifiers (PHI) will be removed prior to upload. No procedures additional to those clinically indicated will be performed for the purposes of this study.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 2500
• Est. completion date: August 2024
• Est. primary completion date: August 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

Adults =18 able to give informed consent. Clinical indication for PET-MPI as determined by the subject's treating physician Exclusion Criteria: Any clinical contraindication for pharmacologic stress testing per ASNC/SNMMI/ACC myocardial perfusion imaging guidelines when stress perfusion imaging is required clinically. Inability or unwilling to give informed consent Pregnant subjects

Related Conditions & MeSH terms

• Arterial Occlusive Diseases
• Arteriosclerosis
• Cardiovascular Diseases
• Coronary Artery Disease
• Coronary Disease
• Heart Diseases
• Ischemia
• Myocardial Ischemia
• Vascular Diseases

Intervention

Diagnostic Test:
• Myocardial Perfusion Imaging Study
Evaluation of myocardial perfusion via PET imaging agent

Drug:
• AMMONIA N-13 37.5 mCi in 1 mL INTRAVENOUS INJECTION [Ammonia N 13]
Cardiac PET imaging agent

Locations

Country	Name	City	State
United States	Molecular Imaging Technologies	El Paso	Texas
United States	Adler Institute for Advanced Imaging	Jenkintown	Pennsylvania
United States	Doral Imaging Institute, LLC dba CIRA	Miami	Florida
United States	Doral Imaging Institute, LLC DBA CIRA Miami Beach	Miami Beach	Florida
United States	UPMC	Pittsburgh	Pennsylvania

Sponsors (1)

Lead Sponsor	Collaborator
Ionetix Corporation

Country where clinical trial is conducted

United States, 

References & Publications (10)

Araujo LI, Lammertsma AA, Rhodes CG, McFalls EO, Iida H, Rechavia E, Galassi A, De Silva R, Jones T, Maseri A. Noninvasive quantification of regional myocardial blood flow in coronary artery disease with oxygen-15-labeled carbon dioxide inhalation and pos — View Citation

Bergmann SR, Herrero P, Markham J, Weinheimer CJ, Walsh MN. Noninvasive quantitation of myocardial blood flow in human subjects with oxygen-15-labeled water and positron emission tomography. J Am Coll Cardiol. 1989 Sep;14(3):639-52. doi: 10.1016/0735-1097 — View Citation

Gewirtz H, Fischman AJ, Abraham S, Gilson M, Strauss HW, Alpert NM. Positron emission tomographic measurements of absolute regional myocardial blood flow permits identification of nonviable myocardium in patients with chronic myocardial infarction. J Am C — View Citation

Kern MJ, Bach RG, Mechem CJ, Caracciolo EA, Aguirre FV, Miller LW, Donohue TJ. Variations in normal coronary vasodilatory reserve stratified by artery, gender, heart transplantation and coronary artery disease. J Am Coll Cardiol. 1996 Nov 1;28(5):1154-60. — View Citation

Merlet P, Mazoyer B, Hittinger L, Valette H, Saal JP, Bendriem B, Crozatier B, Castaigne A, Syrota A, Rande JL. Assessment of coronary reserve in man: comparison between positron emission tomography with oxygen-15-labeled water and intracoronary Doppler t — View Citation

Murthy VL, Naya M, Foster CR, Hainer J, Gaber M, Di Carli G, Blankstein R, Dorbala S, Sitek A, Pencina MJ, Di Carli MF. Improved cardiac risk assessment with noninvasive measures of coronary flow reserve. Circulation. 2011 Nov 15;124(20):2215-24. doi: 10. — View Citation

Renaud JM, Yip K, Guimond J, Trottier M, Pibarot P, Turcotte E, Maguire C, Lalonde L, Gulenchyn K, Farncombe T, Wisenberg G, Moody J, Lee B, Port SC, Turkington TG, Beanlands RS, deKemp RA. Characterization of 3-Dimensional PET Systems for Accurate Quanti — View Citation

Rivas F, Cobb FR, Bache RJ, Greenfield JC Jr. Relationship between blood flow to ischemic regions and extent of myocardial infarction. Serial measurement of blood flow to ischemic regions in dogs. Circ Res. 1976 May;38(5):439-47. doi: 10.1161/01.res.38.5. — View Citation

Sdringola S, Johnson NP, Kirkeeide RL, Cid E, Gould KL. Impact of unexpected factors on quantitative myocardial perfusion and coronary flow reserve in young, asymptomatic volunteers. JACC Cardiovasc Imaging. 2011 Apr;4(4):402-12. doi: 10.1016/j.jcmg.2011. — View Citation

Ziadi MC, Dekemp RA, Williams KA, Guo A, Chow BJ, Renaud JM, Ruddy TD, Sarveswaran N, Tee RE, Beanlands RS. Impaired myocardial flow reserve on rubidium-82 positron emission tomography imaging predicts adverse outcomes in patients assessed for myocardial — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Establish the N-13 measured MBF (ml/g/min) value range	Non-invasive measurements of myocardial blood flow (MBF) in milliliter/minute/gram using PET/CT or PET scanner will be compared to invasive cardiac angiography values (current gold standard). MBF values are obtained using image-derived time activity curves from the left ventricular blood and myocardial tissue regions. These values represent radiotracer exchange between the blood and the tissue over time. The rate of radiotracer uptake into the myocardial tissue provides an estimate of MBF. Processing software will then use the time-activity curves to calculate MBF at rest and at stress.	an estimated average of 2 hours