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Massive pulmonary embolism without haemodynamic compromise caused by the presence of a patent foramen ovale
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A 36 year old man presented to hospital with a Fisher grade 2 subarachnoid haemorrhage (SAH). He was shown to have an 8.5 × 12 mm right middle cerebral artery aneurysm which was clipped without complication.
Three days after craniotomy, he was alert with excellent gas exchange and was extubated. Three hours later he suddenly became cyanotic, profoundly hypoxic, …