Quantitative autonomic testing in the management of botulism

Area of Science:

• Neurology
• Autonomic Neuroscience

Background:

• Botulism, a neuroparalytic illness, often presents with autonomic symptoms despite mild neurological signs.
• Quantitative Autonomic Testing (QAT) can assess sudomotor and cardiovascular reflex functions.

Observation:

• Five food-borne botulism patients underwent QAT, autonomic symptom questionnaires, and examinations at baseline and follow-up.
• Autonomic complaints were more severe than neurological deficits.
• Baseline QAT showed impaired sudomotor function, heart rate variability, and blood pressure regulation.

Findings:

• Patients exhibited high resting heart rate, supine hypertension, orthostatic hypotension, and impaired baroreflex function.
• Three patients experienced reduced physical capacity.
• Follow-up QAT indicated significant improvement in cardiovascular autonomic function.

Implications:

• QAT effectively identifies autonomic dysfunction in botulism, even with subtle neurological findings.
• Comprehensive autonomic evaluation is crucial for effective botulism management.
• Findings inform rehabilitation strategies for botulism survivors.