Total anomalouspulmonaryvenousreturn is not accompanied by a murmur because of the low venous pressure.
由于静脉压力很低,完全性肺静脉异常不产生杂音。
2
Another possibility is an anomalouspulmonaryvenousreturn with a supracardiac connection or increased circulation of the brain, as found in a vein of Galen aneurysm.