Cardiac dysfunction and mortality in critically ill patients with COVID-19: A Swedish multicentre observational study.

"details of each participating icu are described under data s1 .; consent to study inclusion was obtained from the patient or patient's next of kin whenever possible but waived for those included retrospectively 2 2 transthoracic echocardiography was performed according to a standardised protocol (see data s1 ) for assessment of left ventricular (lv) or right ventricular (rv) dysfunction and estimation of pulmonary artery pressure (pap).; details of the echocardiographic examinations at each site are presented in data s1 .; other analyses were not predefined at the initiation of the study and are considered exploratory 2 4 a statistical analysis plan was written before the analyses were performed (data s1 ).; levels of troponin and ntprobnp were higher in patients with cardiac dysfunction compared with patients with normal cardiac function (data s1 ).; length of hospital stay did not differ between the two groups (data s1 ).; data s1 click here for additional data file."

"CONFLICTS OF INTEREST Jonatan Oras and Björn Redfors received funding from the Swedish Heart‐Lung foundation for the conduct of this study. The other authors declare that they have no competing interests."

"Funding information"

"This was a multicentre observational study. It was approved by the Swedish Ethics Review Authority Sweden (approval number 036–18, 2020–01684 and 2020–03815) and registered in the international database at Clinicaltrials.gov (registration number NCT04524234)."