ABSTRACT
A 55-year-old woman presented with complaints of recurrent dyspnoea one year after pneumonectomy carried out as treatment for a tumour of the left lung. During several months her symptoms progressed and eventually mechanical ventilation became necessary. On admission a patent foramen ovale was found with transoesophageal ultrasound but this was judged not to be the cause of her symptoms. The pulmonary angiogram showed a intracardiac shunt with no intrapulmonary shunts. After repeated transoesophageal ultrasound a second defect was found of a sinus venosus type. This large defect was proven to be clinically significant during catherisation of the heart, when occlusion with a balloon was performed. After surgical repair of these defects with an artificial patch, the patient recovered well. Since then she has been without complaints.
