SCMR China: Late Gadolinium Enhancement Webinar-LGE

Video Transcription

Video Summary

This seminar, the first SCMR Chinese-language lecture series, focused on late gadolinium enhancement (LGE) in cardiac MRI and its role in diagnosing cardiomyopathy and other heart diseases. Dr. Jiang Meng explained the basic principles of LGE: after gadolinium contrast is injected, damaged myocardium with disrupted cell membranes retains contrast longer than normal tissue, producing bright “enhanced” areas that represent scar, necrosis, or fibrosis. He reviewed how LGE imaging is performed, including inversion recovery techniques, TI selection, short- and long-axis views, and practical issues such as motion artifacts, heart rate, and choosing the right scan timing.<br /><br />The lecture emphasized the diagnostic value of LGE across diseases. In ischemic cardiomyopathy, LGE follows a coronary distribution and typically begins in the subendocardium, reflecting the wavefront pattern of infarction. In non-ischemic cardiomyopathies, LGE patterns help suggest specific diagnoses such as hypertrophic cardiomyopathy, myocarditis, amyloidosis, sarcoidosis, Fabry disease, arrhythmogenic right ventricular cardiomyopathy, and chemotherapy-related cardiotoxicity. LGE is also useful in pericardial disease, cardiac tumors, thrombus detection, and congenital or infiltrative disorders.<br /><br />In the discussion, experts addressed questions about acute myocardial infarction, noting that early LGE can overestimate infarct size because of edema and extracellular expansion. They also discussed how combining LGE with native T1 and ECV improves diagnostic accuracy, especially when LGE is negative but tissue abnormality is still present. Overall, the session highlighted LGE as a central tool in cardiac MRI for identifying tissue pathology, guiding diagnosis, and assessing prognosis.

Keywords

late gadolinium enhancement

cardiac MRI

cardiomyopathy

myocardial scar

fibrosis

inversion recovery

ischemic cardiomyopathy

non-ischemic cardiomyopathy

myocarditis

amyloidosis

native T1 and ECV