TY - JOUR T1 - Development of the atrial septum JF - Heart JO - Heart SP - 481 LP - 481 DO - 10.1136/heartjnl-2015-309163 VL - 102 IS - 6 AU - Robert H Anderson Y1 - 2016/03/01 UR - http://heart.bmj.com/content/102/6/481.1.abstract N2 - To the Editor,I read with interest the review presented by Asrress et al in your series ‘Education in Heart’.1 I was disappointed to find figure 1 representing a spurious concept of development. Although the concept is to be found in many textbooks of cardiac embryology, it is not necessarily correct. Asrress et al go part way to explaining its deficiency when they state “Infolding of the atrial wall on the right aspect of the septum primum produces the septum secundum”. This mechanism of infolding was described by Rose as long ago as the end of the 19th century.2 The problem with the … ER -