The human heart is a four-chambered double pump with its right and left sides fully separated by a septum and subdivided on Both sides into an atrium above and a ventricle Below.
人类的心脏是一个四室的双泵，左、右边由隔膜完全分离，两边再被分为上方的心房和下方的心室。
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Of these, 5 patients experienced rupture of the ventricular wall, or septum, as a result of a heart attack. In the other 5 patients, the VSD was an unintended consequence of a previous heart surgery.