Post-Anesthesia Dizziness: Causes and Concerns - Neurology

Questions about dizziness for my mother?

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Mother underwent general anesthesia for a bladder endoscopy and resection surgery from February 23 to February 25.
After the anesthesia, she experienced mild headache for one night, which resolved the next morning upon discharge.
However, starting from March 4 (Friday), she began to experience dizziness (localized at the temples), headache (also at the temples), and nausea.
This dizziness was not vertiginous; sometimes while walking, she would notice veering to the right and would quickly correct herself.
The dizziness persisted until March 8 (Tuesday), when she measured her blood pressure at over 140 and went to the neurology outpatient clinic.
She underwent several tests (she forgot to mention the issue of veering to the right while walking) and was scheduled for a carotid ultrasound on March 16 (Wednesday).
She was prescribed antihypertensive medication to take when her blood pressure exceeded 140, but it was only in the range of 10X to 12X, so she did not take it.
Additionally, a urinalysis indicated a possible infection due to an unhealed bladder wound.
From March 2 to March 8, she exhibited symptoms of a urinary tract infection.
On March 10, she started antibiotics and urinary analgesics for three days, during which the dizziness continued, but the headaches became occasional.
On March 12 (Saturday), after dinner, her dizziness worsened, prompting a visit to the emergency department.
Blood tests showed the following results: HCT: 35.6%, PCT: 0.16%, %MONO: 12.3%, BUN: 22, with the rest being normal.
An ECG was normal, and she was given medication for dizziness and to increase cerebral blood flow, which alleviated her symptoms.
A CT scan of the head indicated no bleeding or structural abnormalities.
After discharge, she was prescribed Betahistine Dihydrochloride for three days, which was effective, but the dizziness returned when she did not take it.
She also had Cinnarizine on hand but did not take it regularly.
Her cholesterol was slightly elevated (>200) but untreated, and she has a long history of bilateral tinnitus, with the left ear being more pronounced, only noticeable at night as a buzzing sound.
On March 14 (Monday), she checked her health records and saw the CT report, which stated: "Findings: Computed tomography of the BRAIN was performed without intravenous contrast administration.
Findings: 1.
A lacunar infarct at the left lentiform nucleus without acute intracranial hemorrhage (ICH) or mass lesion is noted.
2.
The ventricles are normal in appearance.
3.
Normal mastoid air cells, no evidence of mastoiditis.
4.
The paranasal sinuses are clear.
5.
Please compare with clinical findings and follow up.
IMPRESSION: 1.
A lacunar infarct at the left lentiform nucleus without acute ICH or mass lesion is noted." Could this lacunar infarct at the left lentiform nucleus be the cause of her persistent dizziness and veering to the right? It is unclear whether this is old or new (the CT was performed eight days after the onset of symptoms).
If Betahistine Dihydrochloride is effective, could this indicate a problem related to the cerebral infarction or an ear issue? Does an MRI of the head and neck allow for visualization of the inner and middle ear? She has been experiencing dizziness for 12 days since March 4.
Please assist in evaluating her condition, Dr.
Jiang.

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Mr. Chen, 60~69 year old female. Ask Date: 2022/03/15