<prompt> The commonest site of rupture of abdominal aoic aneurysms is NOT RELATED - MEDICINEAnteriorPosteriorLeft retroperitoneumRight retroperitoneum  <response>: Abdominal aoic aneurysms can rupture anteriorly into the peritoneal cavity 20 per cent or posterolaterally into the retroperitoneal space 80 per cent. The most common complications after open repair are cardiac ischaemia and infarction and respiratory atelectasis and lower lobe consolidation 