| 单词 | presyncopal dizziness |
| 释义 | presyncopal dizzinesspresyncopal dizzinessVertigo preceding syncope, accompanied by a sense of impending blackout, and tunnel vision, all due to ↓ blood flow to the brain, typically worse when standing; PD may occur in healthy persons who rise too quickly from a chair, often after a meal, accompanied by brief disorientation. See Orthostatic hypotension. |
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