Table 2

Detailed description of clinical symptoms and instrumental findings in COVID-19+ athletes

N	IgG index (<1.4)	Previous COVID-19-related symptoms	Pre-COVID-19 spirometry	Post-COVID-19 spirometry	Pre-COVID-19 resting ECG	Post-COVID-19 resting ECG	Pre-COVID-19 stress-test ECG	Post-COVID-19 stress-test ECG	Pre-COVID-19 echocardiogram	Post-COVID-19 echocardiogram	Post-COVID-19 Holter ECG monitoring
1	4.65	None	Normal	Normal	Sinus bradycardia	Sinus bradycardia	Normal	Normal	Normal	Normal	Rare, isolated SVBP
2	1.75	Ageusia	Normal	Normal	AVB I (PR 220 ms); incomplete RBBB	AVB I (PR 220 ms); incomplete RBBB	Normal	Normal	Mild MV regurgitation	Mild MV regurgitation	Occasional, isolated SVPB; rare, isolated VBP
3	2.36	None	n.a.	Normal	n.a.	Sinus bradycardia; incomplete RBBB	n.a.	Normal	n.a.	Normal	Occasional, isolated SVPB; rare, isolated VBP
4	1.65	None	Normal	Mild reduction in PEF (77% of the theor)	Incomplete RBBB	Incomplete RBBB	Normal	Rare VPB	Mild MV regurgitation	Mild MV regurgitation	Occasional, isolated SVPB; rare, isolated VBP
5	2.46	Ageusia, anosmia	Normal	Normal	Sinus bradycardia; incomplete RBBB	Sinus bradycardia; incomplete RBBB	Normal	Normal	Mild MV regurgitation	Mild MV regurgitation	Rare, isolated SVPB; rare, isolated VBP
6	4.42	Fever >37.5°C, arthromyalgia	Normal	Normal	Sinus bradycardia; incomplete RBBB	Incomplete RBBB	Normal	Normal	Mild MV regurgitation	Mild MV regurgitation	Rare, isolated SVBP
7	4.11	Ageusia, sore throat	Normal	Normal	Sinus bradycardia; incomplete RBBB	Incomplete RBBB	Normal	Rare SVPB	Normal	Normal	Occasional SVPB
8	2.46	None	Normal	Normal	Normal	Normal	Normal	Normal	Normal	Normal	Occasional SVPB
9	2.96	Fever >37.5°C, asthenia	n.a.	Normal	n.a.	Sinus bradycardia; incomplete RBBB	n.a.	Rare VPB, non-significant ST depression	n.a.	Mild MV regurgitation	Rare, isolated SVPB; occasional, isolated VBP
10	2.19	Asthenia, headache	Normal	Normal	Normal	Sinus bradycardia	Normal	Normal	Mild MV regurgitation	Mild MV regurgitation	Rare, isolated SVPB; rare, isolated VBP
11	2.85	None	Normal	Normal	Sinus bradycardia; AVB I (PR 220 ms)	Sinus bradycardia; AVB I (PR 222 ms)	Normal	Normal	Normal	Normal	Occasional, isolated SVPB; occasional, isolated VBP
12	7.35	Fever >37.5°C, cough, asthenia, ageusia, arthromyalgia	Mild reduction in PEF (71% of the theor)	Mild reduction in PEF (74% of the theor)	Normal	Normal	Non-significant ST depression	Non-significant ST depression	Normal	Normal	Occasional, isolated SVPB
13	5.11	Fever >37.5°C, anosmia, ageusia, nocturnal dyspnoea	Normal	Normal	Sinus bradycardia; incomplete RBBB	Incomplete RBBB	Normal	Normal	Normal	Normal	Rare, isolated SVBP
14	1.64	Fever >37.5°C	n.a.	Normal	n.a.	Sinus bradycardia; AVB I (PR 215 ms)	n.a.	Normal	n.a.	Mild MV regurgitation	Occasional, isolated SVPB; rare, isolated VBP
15	5.24	None	Normal	Normal	Sinus bradycardia; incomplete RBBB	Incomplete RBBB	Normal	Normal	Normal	Normal	Occasional, isolated SVPB; rare, isolated VBP
16	4.73	Asthenia	Normal	Normal	Incomplete RBBB	Incomplete RBBB	Normal	Normal	Normal	Normal	Rare, isolated SVPB; occasional, isolated VBP
17	5.8	Fever >37.5°C	Normal	Normal	Sinus bradycardia	Normal	Normal	Normal	Normal	Normal	Rare, isolated SVPB; occasional, isolated VBP
18	2.43	Fever >37.5°C, cough, asthenia, anosmia	Normal	Normal	Normal	Normal	Occasional SVPB	Occasional SVPB	Normal	Normal	Occasional, isolated SVBP

AVB I, first-degree atrioventricular block; MV, mitral valve; N.A., not available; PEF, peak expiratory flow; PR, PR interval; RBBB, right bundle branch block; SVPB, supraventricular premature beats; Theor, theoretical for age and body size; VPB, ventricular premature beats.