Overview
The study aims to determine a diagnostic marker for regionally impaired myocardial oxygenation response in patients with suspected coronary artery stenosis.
Description
This observational applied research international study aims to assess the validity of breathing maneuvers as a vasoactive maneuver and Oxygenation-Sensitive Cardiac Magnetic Resonance Imaging (OS-CMR) in a patient population. OS-CMR results will be compared to the clinical gold standard of Fractional Flow Reserve (FFR) and instant wave-free ratio (iFR) as a secondary objective, to determine if this non-invasive, no pharmaceutical agent imaging technique can identify areas of oxygenation deficit in myocardium perfused by a stenosed coronary artery.
Eligibility
Inclusion Criteria:
Healthy Participants
- Age: > 40y
- No known current or pre-existing significant medical problems that would affect the cardiovascular or respiratory system.
CAD Patients
- Age > 18 y
- Indication for invasive coronary angiography based on symptoms and a test positive for inducible coronary ischemia, or previous coronary angiography.
Exclusion Criteria:
ALL participants:
- General MRI contraindications: Pacemakers, defibrillating wires, implanted defibrillators, intracranial aneurysm clips, metallic foreign bodies in the eyes, knowledge or suspicion of pregnancy.
- Consumption of caffeine (coffee, tea, cocoa, chocolate, "energy drink") during the 12 hours prior to the exam.
- Regular nicotine consumption during the last 6 months.
Patients only
- Vasoactive medication (e.g. nitro) during the 12 hours prior to the exam Contraindications to adenosine (2nd or 3rd A-V block, sinus node disease, asthma, bronchoconstrictive diseases).
- Acute Coronary Syndrome (ACS), or previous Coronary Artery Bypass Surgery
- Previous myocardial infarction within 1 month
- Clinically unstable condition
- Significant or uncontrolled arrhythmia