This situation is actually sometimes called differential cyanosis, since only the lower body is cyanotic.

这种情况实际上称为差异性发绀，因为只有下半身发绀。

Patients can present with cyanosis, specifically it can appear as bluish skin in certain areas like around the lips or the fingertips.

患者可出现发绀，更确切地说，会表现为特定部位的皮肤现青紫色，比如唇周或指端。

This results in cyanosis in the lower extremities, a blue or purple discoloration of the skin; that’s the result of deoxygenated blood mixing with oxygenated blood.

这会导致下肢的发绀，即皮肤变蓝或青紫，是由缺和合合造成的。

When deoxygenated blood mixes into the systemic circulation, it’ll often present as cyanosis, a bluish-purple discoloration of the skin, which can be seen in a baby within the first days after birth.

当无入体循环，会表现为发绀，一种皮肤变为青紫色的症状，在出生后几天便可发现。

Coarctation of the aorta and a bicuspid aortic valve can cause lower extremity cyanosis, meaning a bluish or purplish discoloration of the lower limbs, and can result in congestive heart failure.

主动脉缩窄和二叶式主动脉瓣畸形会导致下肢紫绀，意味着下肢青紫色，并可导致充性心力衰竭。