Key result
CMR findings in GCM mimic cardiac sarcoidosis despite ~30% less LGE mass.
Why the study?
Giant cell myocarditis is an inflammatory cardiomyopathy akin to cardiac sarcoidosis, motivating a study to examine CMR findings in giant cell myocarditis and compare them with cardiac sarcoidosis.
Does cardiac magnetic resonance imaging differentiate giant cell myocarditis from cardiac sarcoidosis?
Population
18 GCM patients and 18 matched CS controls
Comparison
Giant cell myocarditis vs cardiac sarcoidosis
Design
Matched comparative study with blinded CMR analysis
Authors
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CMR cannot qualitatively distinguish giant cell myocarditis from sarcoidosis; leaves open whether LGE mass or acuity aids noninvasive diagnosis.
Case-Control (n=36)
Blinded to clinical data
Does cardiac magnetic resonance imaging differentiate giant cell myocarditis from cardiac sarcoidosis?
Absolute Event Rate: 17.4% vs 25%
p-value: p=0.037
CMR findings in giant cell myocarditis are qualitatively indistinguishable from cardiac sarcoidosis, though GCM presents with smaller LV size and LGE mass despite more acute clinical inflammation.
Pöyhönen et al. (2023) conducted a case-control in Giant cell myocarditis (n=36). Cardiac magnetic resonance (CMR) imaging vs. Cardiac sarcoidosis (CS) was evaluated on Late gadolinium enhancement (LGE) mass (% of LV mass) (p=0.037). Cardiac magnetic resonance findings in giant cell myocarditis are qualitatively indistinguishable from cardiac sarcoidosis, though LGE mass is smaller in GCM (17.4% vs 25.0%, P=0.037).
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