由于槽狭窄，收缩区阻止导管从阻塞段或流动段向另一段移动。
Because of this narrow slot, the pinch zone resists movement of the tube from either the occluding or the flow sections into another section.
收缩区包括因板上收缩区的槽外侧位置横向形成的孔产生的一对曲梁。
The pinch zone includes a pair of curved beams that are formed as a result of apertures formed in the plate at locations laterally outward from the slot of the pinch zone.
其结果是作为心脏的主要动力区的左心室的收缩和有效供血能力受到干扰。
The effect is to freeze much of the left ventricle, the heart's main pumping chamber, disrupting its ability to contract and effectively pump blood.
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