RT Journal Article SR Electronic T1 Quantitative aspects of right-to-left shunting in uncomplicated atrial septal defects. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 894 OP 897 DO 10.1136/hrt.35.9.894 VO 35 IS 9 A1 Rasmussen, K A1 Simonsen, S A1 Storstein, O YR 1973 UL http://heart.bmj.com/content/35/9/894.abstract AB