Cardiovascular Magnetic Resonance in Nonischemic Myocardial Inflammation: Expert Recommendations

Area of Science:

• Cardiology
• Medical Imaging
• Biomedical Engineering

Background:

• Myocardial inflammation diagnosis relies on established criteria.
• Cardiovascular magnetic resonance (CMR) is a key imaging modality.
• Parametric mapping techniques offer new diagnostic possibilities.

Purpose of the Study:

• To update the Lake Louise Criteria for diagnosing myocardial inflammation using CMR.
• To incorporate parametric mapping techniques into diagnostic criteria.
• To enhance the diagnostic accuracy of CMR for myocardial inflammation.

Main Methods:

• Consensus recommendations from a JACC Scientific Expert Panel.
• Inclusion of parametric mapping techniques in CMR protocols.
• Integration of T1 and T2-based criteria for inflammation detection.

Main Results:

• CMR provides strong evidence for myocardial inflammation when combining edema (T2-based) with other inflammatory markers (T1-based).
• A single positive T2-based or T1-based marker can support diagnosis with lower specificity.
• The updated criteria aim to increase the specificity and accuracy of CMR diagnostics.

Conclusions:

• The revised Lake Louise Criteria improve CMR's ability to diagnose myocardial inflammation.
• Combining T2 and T1 markers offers a more specific diagnostic pathway.
• Parametric mapping integration enhances diagnostic capabilities for inflammatory heart conditions.