Table. Demographic Features and Echocardiographic and Cardiovascular Magnetic Resonance Parameters in Competitive Athletes Recovering From Coronavirus Disease 2019^a.

Athlete No.	Sex	Symptoms	Time CMR performed after positive test result, d	Echocardiography, mL/m2		CMR, %		Native T1, ms	ECV, %	Maximal T2, ms, (AHA segments)	LGE (pattern/AHA segments)	CMR (updated Lake Louise Criteria)
				LVEDV	RVEDV	LVEF	RVEF
1	Male	No	21	Not done	Not done	60	49	1034	21	51 (9)	Yes (RV insertion; 9)	Normal
2	Male	No	22	51	46	56	59	964	24	48 (9)	Yes (patchy; 6, 8)	Normal
3	Male	No	22	65	60	60	64	953	22	48 (10)	Yes (patchy, 5)	Normal
4	Male	No	15	65	48	59	54	905	20	48 (9)	Yes (linear; 8, 12)	Normal
5	Male	No	17	66	57	55	54	994	24	55 (9)	Yes (epicardial; 3, 9)	Myocarditis
6	Male	Yes	23	73	52	61	62	947	26	63 (3, 9)	Yes (patchy; 3, 9)	Myocarditis
7	Male	Yes	53	66	64	53	52	991	25	49 (7, 9)	Yes (linear, patchy; 8, 9, 12)	Normal
8	Male	No	20	76	36	56	53	963	17	51 (10)	No	Normal
9	Male	Yes	18	60	71	56	52	964	24	52 (7)	Yes (patchy; 3, 9)	Normal
10	Male	Yes	11	67	70	61	58	929	25	58 (8, 9)	Yes (patchy; 2, 3, 8, 9)	Myocarditis
11	Male	No	23	57	49	63	60	987	22	53 (7)	No	Normal
12	Male	Yes	28	72	59	50	53	966	28	53 (7, 8)	No	Normal
13	Male	No	28	81	52	33	53	925	25	53 (7, 8)	No	Normal
14	Male	No	11	46	41	65	54	989	24	53 (8)	No	Normal
15	Male	No	48	56	51	59	57	1003	25	53 (7)	Yes (RV insertion; 9)	Normal
16	Female	Yes	23	68	50	64	58	1001	26	52 (8)	No	Normal
17	Female	Yes	23	55	56	57	60	1030	28	48 (10)	No	Normal
18	Female	No	21	53	35	65	66	1008	25	48 (9)	No	Normal
19	Female	Yes	17	60	32	63	57	978	26	53 (8)	No	Normal
20	Female	No	31	62	51	58	59	1002	25	52 (8)	No	Normal
21	Female	Yes	31	52	40	60	60	946	28	53 (8)	No	Normal
22	Female	Yes	30	67	49	59	64	1000	27	52 (8)	Yes (linear; 12)	Normal
23	Female	Yes	30	58	57	57	55	964	26	53 (11)	No	Normal
24	Female	Yes	26	52	49	55	57	1010	30	53 (10)	No	Normal
25	Female	No	31	56	36	56	56	1027	28	50 (7)	No	Normal
26	Male	No	12	80	44	60	53	969	21	61 (8)	Yes (linear; 8, 9)	Myocarditis

Abbreviations: AHA, American Heart Association; CMR, cardiovascular magnetic resonance imaging; ECV, extracellular volume fraction; EDV, end-diastolic volume; EF, ejection fraction; LGE, late gadolinium enhancement; LV, left ventricular; RV, right ventricular.

^aSymptoms refer to symptoms during short-term infection. Echo volumes were calculated by 3-dimensional method. Cardiovascular magnetic resonance imaging–derived left and right ventricular volumes and function were measured from contiguous short-axis cine images using semiautomated software for endocardial segmentation using endocardial and epicardial contours at end systole and end diastole per standard protocol. Cardiovascular magnetic resonance imaging–derived myocardial T1 and T2 mapping and ECV were done per standard guidelines. Mean (SD) native T1 less than 999 (31) milliseconds, native T2 of less than 53 milliseconds, and ECV of less than 29% were considered normal per institutional protocol based on phantom and human volunteer experiments. T2 and LGE were only considered significant if seen in 2 orthogonal planes.