Table 2

Detailed information regarding athetes with post-COVID-19 with myocardial or pericardial alterations on cardiac MRI

Athlete no	Sex	Symptoms	Findings on other exams	Time to CMR after positive test results (days)	hsTnT recorded prior to CMR (ng/L)	CMR findings	Pathological alteration	Certainty of cardiac involvement	Clinical outcome (6 months)
1.	Male	Moderate Chest pain. Fever. Headache. Joint pain. Diarrhoea. Smell and taste disturbance.	Troponin: elevated (hsTnT: 18 ng/L, normal: <14 ng/L) 12-lead ECG: minor repolarisation. alteration Holter ECG: sinus tachycardia (1 hour) Echocardiography: slightly dilated RV Exercise test (4 months after COVID-19 infection): normal	70	18	LVEF: 52% GLS: −18% Septal native T1: normal Septal native T2: normal Pathological LGE/pattern: yes—lateral subepicardial T1 and T2 mapping value in the area corresponding with the LGE: 1016 and 50 ms—mildly elevated		Definite	Returned to sport, no persistent cardiac complaints at follow-up
2.	Male	Moderate Chest pain. Dyspnoea. Fever. Cough.	Troponin: elevated (hs troponin I: 198 ng/L, normal: <45 ng/L) 12-lead ECG: minor repol. alteration Holter ECG: normal Echocardiography: normal Exercise test (3 months after COVID-19 infection): normal	74	NA	LVEF: 58% GLS: −18% Septal native T1: elevated Septal native T2: normal Pathological LGE/pattern: Yes—lateral subepicardial T1 and T2 mapping value in the area corresponding with the LGE: 1065 and 53 ms—elevated		Definite	Returned to sport, no persistent cardiac complaints at follow-up
3.	Male	Moderate Chest pain. Dyspnoea. Fatigue. Cough.	Troponin: normal 12-lead ECG: RBBB (previously reported) Holter ECG: not performed Echocardiography: normal Exercise test (5 months after COVID-19 infection): normal	27	4	LVEF: 61% GLS: −22% Septal native T1: normal Septal native T2: normal Pathological LGE/pattern: Yes—non-specific inferior and hinge point LGE T1 and T2 mapping value in the area corresponding with the LGE: 984 and 41 ms—normal		Possible	Returned to sport, no persistent cardiac complaints at follow-up
4.	Female	Long COVID-19 Palpitation. Long-lasting fatigue.	Troponin: normal 12-lead ECG: normal Holter ECG: normal Echocardiography: normal Exercise test (5 months after COVID-19 infection): normal	67	<3	LVEF: 67% GLS: −27% Septal native T1: grey zone normal/elevated Septal native T2: mildly elevated Pathological LGE/pattern: no		Possible	Returned to sport, no persistent cardiac complaints at follow-up
5.	Female	Moderate Chest pain. Back pain. Smell and taste disturbance.	Troponin: normal 12-lead ECG: PVC Holter ECG: trigeminy PVC on exertion Echocardiography: normal Exercise test (4 months after COVID-19 infection): normal	19	<3	LVEF: 60% GLS: −22% Septal native T1: mildly elevated Septal native T2: mildly elevated Pathological LGE/pattern: No		Possible	Returned to sport, no ongoing cardiac complaints.
6.	Female	Mild Fever. Fatigue. Palpitation. Smell and taste disturbance.	Troponin: elevated (hs troponin I: 28 ng/L—normal: <1.9 ng/L) 12-lead normal Holter ECG: NA Echocardiography: normal Exercise test: NA	11	<3	LVEF: 55% GLS: −18% Septal native T1: mildly elevated Septal native T2: normal Pathological LGE/pattern: no		Possible	Returned to sport, no ongoing cardiac complaints
7.	Male	Moderate Chest pain. Long-lasting fatigue.	Troponin: elevated (hs troponin I: 225 ng/L—normal: <45 ng/L) 12-lead ECG: descending PQ segment depression Holter ECG: NA Echocardiography: decreased longitudinal strain, mild anterior and anteroseptal wall motion abnormality Holter ECG: NA	120	10	LVEF: 61% GLS: −20% Septal native T1: normal Septal native T2: normal Pathological LGE/pattern: Yes—pericardial involvement		Possible	Returned to sport, no ongoing cardiac complaints

CMR, cardiac magnetic resonance; GLS, global longitudinal strain; hsTnT, high-sensitivity troponin T; LVEF, left ventricular ejection fraction; NA, not applicable; PVC, premature ventricular complex.