Careful echo examination of these latter 5 patients showed each had a right-to-left shunt from a PFO, and subsequent examination of the 2 symptomatic index patients also revealed each had a PFO.

• 对这5个病人仔细的超声检查发现，每个病人都有卵圆孔未闭，而引起的右到左分流；随即检查出现症状的2个病例；也同时发现了卵圆孔未闭.