A 48-year-old man from Mumbai presents with a 2-year history of recurrent episodes of severe spinning vertigo, each lasting 1–2 hours, occurring 2–3 times per month. He has progressive hearing loss in the right ear and constant right-sided tinnitus described as a 'roaring' sound. He also reports a sensation of fullness in the right ear before each vertigo attack. Audiometry shows low-frequency SNHL on the right (500–1000 Hz more affected than 4000 Hz). Electrocochleography (ECoG) shows elevated summating potential (SP) to action potential (AP) ratio on the right. What is the most appropriate next step in management?

Explanation

## Management of Meniere Disease: First-Line Therapy ### Diagnosis Confirmation **Key Point:** This patient meets diagnostic criteria for definite Meniere disease: - Episodic vertigo (1–2 hours, 2–3 times/month) - Unilateral tinnitus and aural fullness - Fluctuating low-frequency SNHL - Elevated SP/AP ratio on ECoG (confirms endolymphatic hydrops) ### Management Algorithm ```mermaid flowchart TD A[Confirmed Meniere Disease]:::outcome --> B[Conservative Management]:::action B --> C[Diuretics + Low-sodium diet] B --> D[Vestibular rehabilitation] B --> E[Avoid triggers] C --> F{Response after 3-6 months?}:::decision F -->|Good| G[Continue medical therapy]:::action F -->|Poor| H[Consider ablative/surgical options]:::action H --> I[Intratympanic gentamicin OR endolymphatic sac surgery]:::action ``` ### First-Line Medical Management **High-Yield:** Conservative therapy is the FIRST step in all patients with Meniere disease, regardless of severity. | Intervention | Mechanism | Evidence | |--------------|-----------|----------| | **Diuretics** (HCTZ 25 mg daily) | Reduce endolymphatic volume by decreasing fluid production | Level 1A evidence; 60–70% respond | | **Low-sodium diet** (<2 g/day) | Osmotic reduction of endolymphatic volume | Synergistic with diuretics | | **Vestibular rehabilitation** | Central compensation for vestibular asymmetry | Reduces fall risk, improves balance | | **Caffeine/alcohol avoidance** | Osmotic and vasomotor triggers | Reduces attack frequency | **Clinical Pearl:** Diuretics work best in the early stages of Meniere disease when endolymphatic hydrops is reversible. Response typically takes 3–6 weeks to 3 months. ### Why NOT the Other Options (Yet) **Endolymphatic sac decompression (Option B):** - Reserved for **intractable cases** (>4 attacks/month despite 6 months of medical therapy) - Success rate is 50–70% and declining over time - Not indicated as first-line in a patient with only 2–3 attacks/month **Intratympanic gentamicin (Option C):** - Ablative therapy for **intractable vertigo** - Risks permanent hearing loss and vestibular ablation - Reserved for patients who fail medical management AND cannot tolerate surgery - Not appropriate as initial therapy **Indefinite vestibular suppressants (Option D):** - Meclizine, dimenhydrinate, promethazine are for acute vertigo episodes, not chronic suppression - Chronic use impairs vestibular compensation and increases fall risk - Not recommended as monotherapy ### Treatment Escalation Pathway **Mnemonic: "SHED" (Stepwise Hierarchical Escalation in Dizziness)** - **S** — Salt restriction + diuretics (first-line) - **H** — Hearing preservation (avoid ototoxic agents initially) - **E** — Endolymphatic sac surgery (for refractory cases) - **D** — Destructive procedures (gentamicin, labyrinthectomy for intractable vertigo) **Warning:** Do NOT jump to ablative therapy in a patient with only 2–3 attacks/month. Most patients respond to medical management; surgery is reserved for the minority with intractable disease.