TY - RPRT TI - [The orthostatic blood pressure decrease in patients with atrial septal defects and its influence by means of surgical closure]. AU - K Bachmann AU - F Gall AU - N Graf AU - H P Heynen PY - 1968 UR - https://pubmed.ncbi.nlm.nih.gov/5721679/ ID - 5721679 ER -