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Related Experiment Video

Updated: May 11, 2026

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Published on: August 17, 2022

Oxygenation-sensitive cardiovascular magnetic resonance.

Matthias G Friedrich¹, Theodoros D Karamitsos

¹Montreal Heart Institute, Departments of Cardiology and Radiology, Université de Montréal, Montreal, QC, Canada. mgwfriedrich@gmail.com

Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance

|May 28, 2013

Summary

Cardiovascular magnetic resonance (CMR) uses blood oxygen-dependent (BOLD) imaging to assess heart muscle oxygenation non-invasively. This technique leverages hemoglobin

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Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

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Area of Science:

Cardiovascular Imaging
Biomedical Engineering
Physiology

Background:

Non-invasive assessment of myocardial oxygenation is crucial for diagnosing and managing cardiovascular diseases.
Traditional methods often require contrast agents or are invasive.
Oxygenation-sensitive cardiovascular magnetic resonance (CMR) offers a promising alternative.

Purpose of the Study:

To review the fundamental principles of oxygenation-sensitive CMR using the blood oxygen-dependent (BOLD) technique.
To summarize preclinical and clinical studies evaluating myocardial oxygenation with BOLD-CMR.
To discuss recent advancements, limitations, and future directions in this field.

Main Methods:

Explains the BOLD principle: deoxygenated hemoglobin acts as an intrinsic contrast agent.
Details how changes in blood oxygen saturation affect MRI signal (T2 or T2*).
Summarizes findings from preclinical animal models and human clinical trials.

Main Results:

BOLD-CMR can non-invasively reflect myocardial oxygenation levels.
Increased oxygen saturation enhances the BOLD signal (T2/T2*).
Decreased oxygen saturation diminishes the BOLD signal.

Conclusions:

Oxygenation-sensitive CMR is a viable non-contrast technique for assessing myocardial oxygenation.
The BOLD technique shows significant potential for clinical applications in cardiology.
Emerging techniques promise further advancements in this evolving field.