CLINICAL RESEARCH: CARDIAC IMAGING
Diagnostic Performance of Cardiovascular Magnetic Resonance in Patients With Suspected Acute Myocarditis
Comparison of Different Approaches
Hassan Abdel-Aty, MD*,
Philipp Boyé, MD*,
Anja Zagrosek, MD*,
Ralf Wassmuth, MD*,
Andreas Kumar, MD*,
Daniel Messroghli, MD*,
Petra Bock, MD*,
Rainer Dietz, MD*,
Matthias G. Friedrich, MD, FESC*, and
Jeanette Schulz-Menger, MD*,*
* Franz-Volhard-Klinik, Charité Campus Buch, Universität Medizin Berlin, Berlin, Germany
Stephenson CMR Centre, Departments of Cardiac Sciences and Radiology, University of Calgary, Calgary, Alberta, Canada
Manuscript received September 1, 2004;
revised manuscript received November 3, 2004,
accepted November 11, 2004.
* Reprint requests and correspondence: Dr. Jeanette Schulz-Menger, Wiltbergstr. 50, D-13125, Berlin, Germany. (Email: schulzmenger{at}fvk-berlin.de).
OBJECTIVES: The aim of this research was to identify the diagnostic performance of gadolinium-enhanced and T2-weighted cardiovascular magnetic resonance (CMR) in suspected acute myocarditis.
BACKGROUND: Acute myocarditis is difficult to diagnose; CMR provides various means to visualize myocardial inflammatory changes. A CMR approach with clear-cut diagnostic criteria would be desirable.
METHODS: We investigated 25 patients with suspected acute myocarditis (18 males, 44 ± 17 years) and 23 healthy controls (13 males, 29 ± 10 years). Cardiovascular magnetic resonance studies included the following sequences: 1) T2-weighted triple inversion recovery; 2) T1-weighted spin echo before and over 4 min after gadolinium injection; and 3) inversion recovery-gradient echo 10 min after gadolinium injection. Qualitative and quantitative image analysis was performed for: 1) focal and global T2 signal intensity (SI); 2) myocardial global relative enhancement (gRE); and 3) areas of late gadolinium enhancement (LGE).
RESULTS: Both global T2 SI and gRE were higher in patients than in controls (T2: 2.3 ± 0.4 vs. 1.7 ± 0.4; p < 0.0001, gRE: 6.8 ± 4.0 vs. 3.7 ± 2.3; p < 0.001). The sensitivity, specificity, and diagnostic accuracy for T2 (cutoff value of 1.9) were 84%, 74%, and 79%, respectively; gRE: (cutoff value of 4.0) 80%, 68%, and 74.5% respectively; LGE: 44%, 100%, and 71%, respectively. The best diagnostic performance was obtained when "any-two" of the three sequences were positive in the same patient yielding a 76% sensitivity, 95.5% specificity, and 85% diagnostic accuracy.
CONCLUSIONS: A combined CMR approach using T2-weighted imaging, early and late gadolinium enhancement, provides a high diagnostic accuracy and is a useful tool in the diagnosis and assessment of patients with suspected acute myocarditis.
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Abbreviations and Acronyms
| | CK = creatine kinase | | CMR = cardiovascular magnetic resonance | | gRE = global relative enhancement | | LGE = late gadolinium enhancement | | SI = signal intensity |
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