RT Journal Article SR Electronic T1 Are biventricular and biatrial function truly preserved after arterial switch operation? JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1609 OP 1610 DO 10.1136/heartjnl-2021-319820 VO 107 IS 20 A1 Ellen Ostenfeld A1 Marcus Carlsson YR 2021 UL http://heart.bmj.com/content/107/20/1609.abstract AB