Sudden decrease in blood pressure is not a precursor of cerebral infarction.
The precursor of cerebral infarction is transient ischemic attack, which is a transient neurological dysfunction due to local ischemia of the brain, spinal cord, and retina, with a sudden onset and short duration, which can be repeated as stereotyped episodes, can be completely relieved, and usually lasts from a few minutes to an hour, with most of them lasting from 2 to 15 minutes. It may manifest as episodes of limb motor and sensory deficits, aphasia, ataxia, and vertigo.
Sudden decrease in blood pressure may be caused by heart pumping dysfunction, such as heart failure, and volume deficiency, such as profuse sweating, blood loss, and insufficient intake. Sudden decrease in blood pressure can affect the blood supply to the brain, especially when combined with cerebral stenosis, which can lead to cerebral infarction and is a risk factor for cerebral infarction rather than a precursor symptom.
When you find a sudden decrease in blood pressure, you should consult a doctor in time to clarify the cause and treatment, so as to avoid adverse consequences.