Acute vertigo, pulmonary hypertension and allergy testing

April 17, 2026

Begin with acute vertigo, then read pulmonary hypertension and allergy testing for three places where one diagnosis or test result closes the case too soon.

PEARL OF THE DAY

Acute vertigo without hearing symptoms is not labyrinthitis by default.

Summary

Start with labyrinthitis. It is the clearest first listen because it changes what you do in the first minutes of assessing a dizzy patient: ask about hearing loss and tinnitus, document cranial nerves, gait, and cerebellar findings, and do not let the word labyrinthitis stand when the auditory story is missing. That matters because the wrong diagnosis can delay urgent review for sudden sensorineural hearing loss or push posterior circulation stroke too far down the list.

Several of today’s better listens are about not letting one test result or one early diagnosis settle the case. Pulmonary hypertension reminds you that a negative CT pulmonary angiogram does not exclude chronic thromboembolic disease, and allergy reminds you that skin prick or serum allergen-specific IgE shows sensitisation, not clinical allergy on its own. The rest of the briefing covers code red activation and corridor care, cardio-oncology surveillance, and amyloid-based Alzheimer's prevention trials.

Today's podcasts

Ep 202 – Labyrinthitis

Start here: acute vertigo with hearing loss needs a more careful first pass than the word labyrinthitis suggests. Ask about tinnitus, document cranial nerves, gait, and cerebellar findings, and do not miss sudden sensorineural hearing loss or posterior circulation stroke.

Episode 454: Pulmonary Hypertension

Syncope in pulmonary hypertension is a bad sign, not an incidental symptom. Open this for the bedside traps: a negative CT pulmonary angiogram does not exclude chronic thromboembolic disease, and rapid worsening after vasodilators should raise concern for pulmonary veno-occlusive disease.

Allergy (2nd edition)

A careful exposure history does more work here than broad allergy testing. The episode is strongest on two common mistakes: treating skin prick or serum allergen-specific IgE as proof of food allergy, and undercalling anaphylaxis when respiratory or cardiovascular features are already present.

Ep 291 - January 2026 Round-Up: RSI Trial, Trauma Leadership, and the Reality of Corridor Care

Several emergency medicine arguments sit inside this round-up, but the clearest bedside point is code red activation. Trigger it from active bleeding and shock physiology rather than waiting for certainty, then read the RSI paper from its primary mortality outcome before changing practice.

The SGLT2i Effect – Protection Against Cancer Therapy-Related Cardiac Dysfunction with Dr. Manu Mysore

Cancer-treatment dyspnoea and falling exercise tolerance are the clinical entry points here, not the drug name alone. The useful move is surveillance: baseline risk, serial echocardiography, global longitudinal strain, and biomarkers matter, while the SGLT2 story remains promising but still early.

A Path to Preventing Cognitive Impairment Due to Alzheimer's Disease

This is the most future-facing listen today. It is less about current bedside decisions than about what amyloid blood tests or PET positivity in cognitively unimpaired people may mean for prevention trials, delayed cognitive impairment, and the coverage and access work needed before use widens.

What to change on your next shift

On the next patient with acute vertigo, ask about hearing loss and tinnitus before the diagnosis lands. Document cranial nerves, gait, and cerebellar findings, and if sudden sensorineural hearing loss or focal neurology is present, move to urgent specialist assessment rather than treating it as routine peripheral vertigo.

Quick questions from today’s briefing

What feature makes labyrinthitis more likely than vestibular neuritis?

Hearing loss or tinnitus alongside acute vertigo points towards labyrinthitis. Acute vertigo without hearing involvement is not typical.

What should be documented before a dizzy patient is called peripheral?

A focused neurological examination, especially cranial nerves, gait, and cerebellar function. Any focal deficit shifts concern towards posterior circulation stroke.

What test still matters when chronic thromboembolic disease is possible after a negative CT pulmonary angiogram?

A ventilation-perfusion scan. CT pulmonary angiography alone does not exclude chronic thromboembolic pulmonary hypertension.

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