Table 1.

Inclusion and exclusion criteria.

Inclusion Criteria	Exclusion Criteria
-aged under 55 years	-age over 55 years
-patients hospitalized during the first COVID-19 outbreak for a mild/moderate form	-severe/critical form of COVID-19 pulmonary infection
-diagnosis confirmed by a positive result of real-time reverse transcriptase–polymerase chain reaction of nasal and pharyngeal swabs	-respiratory insufficiency, requiring mechanical ventilation and/or intensive care unit (ICU) stay, during hospitalization
-TCT documented pneumonia	-absence of TCT or of pulmonary lesions on TCT
-a normal routine TTE performed at admission	-patients diagnosed during the study with significant cardiac pathology
-without history of significant CV diseases or diabetes mellitus