In a 65-year-old man with hypertension who has a persistent sensation that his environment is rotating for several days, worsened by lying down and movement and not relieved by closing his eyes, what type of vertigo is most likely?

Peripheral Vertigo (Likely Benign Paroxysmal Positional Vertigo)

This patient is experiencing peripheral vertigo, most likely Benign Paroxysmal Positional Vertigo (BPPV), based on the classic presentation of rotational vertigo lasting several days, triggered by positional changes (lying down and movement), though the lack of relief with eye closure is somewhat atypical.

Clinical Reasoning

The description of "environment rotating" represents true rotational vertigo - a hallmark of vestibular pathology. The key distinguishing features point toward a peripheral rather than central etiology:

Why This is Peripheral Vertigo:

• Positional triggers: Symptoms worsen with lying down and movement, classic for BPPV 1
• Persistent duration: Several days of symptoms can occur with BPPV, contrary to the common misconception that it only causes brief episodes 2
• Age and demographics: 65-year-old male falls within the typical BPPV demographic (most common in older adults) 3

Critical Differential Consideration - Central vs Peripheral:

However, this patient requires urgent evaluation to exclude central causes, particularly given:

• Hypertension as a vascular risk factor: In patients with acute vestibular syndrome (AVS) and vascular risk factors, the prevalence of posterior circulation stroke can be as high as 25-75% 1
• Persistent symptoms: Continuous vertigo lasting days fits the AVS pattern, where 11% of patients without focal neurologic signs still have acute infarcts 1
• Age and hypertension: These increase stroke risk substantially 4

Immediate Clinical Action Required

Perform a complete neurologic examination and HINTS examination (Head-Impulse, Nystagmus, Test of Skew) to distinguish peripheral from central causes 1, 5:

• If HINTS suggests peripheral etiology AND performed by trained examiner: BPPV is most likely (59.7% of vertigo cases in neurology clinics) 3
• If any central features present OR examiner not HINTS-trained: MRI brain is indicated urgently - 75-80% of AVS from stroke lack focal neurologic deficits 1

Perform Dix-Hallpike Maneuver:

This is essential for BPPV diagnosis and should be done immediately if no contraindications 6, 5, 3. Positive findings would confirm BPPV and allow immediate treatment with canalith repositioning (Epley maneuver).

Important Caveats

The statement that "closing eyes won't alleviate it" is somewhat atypical for BPPV, as visual fixation typically worsens peripheral vertigo. This could suggest:

• Central pathology (requires imaging)
• Severe peripheral vertigo where visual input doesn't help
• Patient misinterpretation of symptom relief

Do not assume benign etiology based on absence of focal neurologic signs alone - one-third to two-thirds of posterior circulation strokes present without focal findings 1. The combination of hypertension, age 65, and persistent vertigo mandates careful stroke exclusion.

Classification Answer

Type: Peripheral vertigo (most likely BPPV), but central causes must be urgently excluded given vascular risk factors and persistent symptoms 1.