Trial Outcomes & Findings for Absolute Quantification of Coronary Flow Reserve by Stress Perfusion MRI (NCT NCT01655043)

NCT ID: NCT01655043

Last Updated: 2019-08-28

Results Overview

The investigators anticipated that a novel MRI imaging protocol using a high relaxivity blood-pool contrast agent (gadofosveset trisodium) would be capable of quantifying coronary flow reserve based on quantification of myocardial blood volume and would be correlated with myocardial flow reserve as measured in low spatial resolution nuclear SPECT scans. Pre- and post- gadofosveset trisodium images were to be used to calculate the myocardial blood volume. Myocardial blood volume is derived from an equation of the relaxation times of hydrogen atoms in the blood and myocardium. If the agent administered did not behave as a true intravascular agent in the myocardium, quantification of myocardial intravascular blood volume (and hence a calculated coronary flow reserve) could not be calculated using the specified approach. In this case, relaxation times would be reported. Relaxation (R) times are measured in inverse seconds.

• Recruitment status: COMPLETED
• Study phase: PHASE2
• Target enrollment: 20 participants
• Primary outcome timeframe: outcome measured following single MRI scan
• Results posted on: 2019-08-28

Participant Flow

Participant milestones

Measure	Coronary Artery Disease Patients Patients with suspected coronary artery disease prospectively recruited for myocardial perfusion MRI. All subjects to receive 5 ml IV gadofoveset trisodium contrast (Ablavar, Lantheus) at both stress and rest. Stress to be induced using 5 ml intravenous (IV) regadenoson (Lexiscan, Astellas US LLC), and the effects of regadenoson were reversed with 50 mg IV aminophylline following the completion of stress imaging.
Overall Study STARTED	20
Overall Study COMPLETED	20
Overall Study NOT COMPLETED	0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Absolute Quantification of Coronary Flow Reserve by Stress Perfusion MRI

Baseline characteristics by cohort

Measure	Coronary Artery Disease Patients n=20 Participants Patients with suspected coronary artery disease prospectively recruited for myocardial perfusion MRI. All subjects to receive 5 ml IV gadofoveset trisodium contrast (Ablavar, Lantheus) at both stress and rest. Stress to be induced using 5 ml intravenous (IV) regadenoson (Lexiscan, Astellas US LLC), and the effects of regadenoson were reversed with 50 mg IV aminophylline following the completion of stress imaging.
Age, Continuous	61.8 years STANDARD_DEVIATION 12.2 • n=5 Participants
Sex: Female, Male Female	7 Participants n=5 Participants
Sex: Female, Male Male	13 Participants n=5 Participants
Ethnicity (NIH/OMB) Hispanic or Latino	1 Participants n=5 Participants
Ethnicity (NIH/OMB) Not Hispanic or Latino	18 Participants n=5 Participants
Ethnicity (NIH/OMB) Unknown or Not Reported	1 Participants n=5 Participants
Race (NIH/OMB) American Indian or Alaska Native	0 Participants n=5 Participants
Race (NIH/OMB) Asian	1 Participants n=5 Participants
Race (NIH/OMB) Native Hawaiian or Other Pacific Islander	0 Participants n=5 Participants
Race (NIH/OMB) Black or African American	2 Participants n=5 Participants
Race (NIH/OMB) White	15 Participants n=5 Participants
Race (NIH/OMB) More than one race	0 Participants n=5 Participants
Race (NIH/OMB) Unknown or Not Reported	2 Participants n=5 Participants
Region of Enrollment United States	20 participants n=5 Participants

PRIMARY outcome

Timeframe: outcome measured following single MRI scan

The investigators anticipated that a novel MRI imaging protocol using a high relaxivity blood-pool contrast agent (gadofosveset trisodium) would be capable of quantifying coronary flow reserve based on quantification of myocardial blood volume and would be correlated with myocardial flow reserve as measured in low spatial resolution nuclear SPECT scans. Pre- and post- gadofosveset trisodium images were to be used to calculate the myocardial blood volume. Myocardial blood volume is derived from an equation of the relaxation times of hydrogen atoms in the blood and myocardium. If the agent administered did not behave as a true intravascular agent in the myocardium, quantification of myocardial intravascular blood volume (and hence a calculated coronary flow reserve) could not be calculated using the specified approach. In this case, relaxation times would be reported. Relaxation (R) times are measured in inverse seconds.

Outcome measures

Measure	Coronary Artery Disease Patients n=20 Participants Patients with suspected coronary artery disease prospectively recruited for myocardial perfusion MRI. All subjects to receive 5 ml IV gadofoveset trisodium contrast (Ablavar, Lantheus) at both stress and rest. Stress to be induced using 5 ml intravenous (IV) regadenoson (Lexiscan, Astellas US LLC), and the effects of regadenoson were reversed with 50 mg IV aminophylline following the completion of stress imaging.
Quantification of Myocardial Blood Volume Delta R1(blood)	3.63 seconds^-1 Standard Deviation .54
Quantification of Myocardial Blood Volume Delta R1(myo)	1.23 seconds^-1 Standard Deviation .24

Adverse Events

Coronary Artery Disease Patients

Serious events: 0 serious events

Other events: 0 other events

Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Dr. James Carr

Northwestern University

Phone: (312)926-2270

Email: jcarr@northwestern.edu

Results disclosure agreements

• Principal investigator is a sponsor employee
• Publication restrictions are in place