Table 2.

CMR Imaging Results Stratified by the Specific 2018 Lake Louis II Diagnosis of Myocarditis: Cardiac 18F‐FDG‐PET/CT Evidence of Myocardial Inflammatory Cell Infiltration

	Patients	Myocarditis (CMR)	No myocarditis (CMR)	Inflammatory cell infiltration (cardiac PET)	No inflammatory cell infiltration (cardiac PET)
No.	26*	9	16	7	16
LV ejection fraction, %	61 [57–67]	59 [56–62]	64 [59–68]	62 [60–63]	60 [56–69]
LV EDVi, mL/m2	65 [62–72]	65 [60–73]	66 [62–72]	64 [56–75]	66 [62–72]
LV ESVi, mL/m2	25 [21–29]	25 [21–32]	22 [21–27]	2 [20–32]	26 [21–30]
LV SVi, mL/m2	42 [34–48]	38 [30–44]	44 [38–49]	38 [31–42]	44 [36–50]
RV ejection fraction, %	56 [48–60]	50 [47–58]	58 [54–60]	52 [48–56]	59 [52–61]
T1–maximum, ms	1356 [1304–1412]	1342 [1301–1403]	1372 [1322–1414]	1317 [1297–1405]	1380 [1335–1424]
T2–maximum, ms	62 [57–68]	68 [67–70]	58 [56–62]	66 [64–69]	60 [56–63]
ECV, maximum %	31 [28–34]	34 [31–36]	29 [27–32]	33 [31–35]	30 [27–34]
LGE, %	9 (35)	6 (67)	2 (12)	6 (86)	3 (19)
Subendocardial LGE, %	2 (8)	2 (22)	0 (0)	2 (29)	0 (0)
Mid‐wall, %	8 (31)	5 (56)	2 (12)	5 (71)	3 (19)
Myocarditis‐specific Lake Louis criteria, CMR	9 (36)			5 (71)	3 (20)
Myocardial inflammatory cell infiltration, PET	7 (30)	5 (63)	2 (14)
Pulmonary inflammation, percentage of lung	17 [3–29]	16 [2–30]	17 [10–31]	7 [2–20]	22 [13–38]
Pulmonary consolidation, percentage of lung	12 [7–18]	10 [8–16]	13 [7–18]	9 [8–12]	16 [7–19]

Data are provided as number, number (percentage), or median [interquartile range]. 18F‐FDG indicates 2‐deoxy‐2‐[fluorine‐18]fluoro‐D‐glucose; CMR, cardiac magnetic resonance; CT, computed tomography; ECV, extracellular volume; EDVi, indexed end‐diastolic volume; ESVi, indexed end‐systolic volume; LGE, late gadolinium enhancement; LV, left ventricle; PET, positron emission tomography; RV, right ventricle; SVi, systolic volume indexed; T1, longitudinal relaxation time; and T2, horizontal relaxation time.

^*Denominators differ for each modality because not all scans were performed/diagnostic on every patient.