Singing High Notes May Trigger Stroke in Moyamoya Patients, Doctors Warn
AM730 · 1 SOURCESabout 2 hours ago6 MIN
Summary
Neurosurgeon Fok Kam Fuk (霍錦福) has highlighted the hidden dangers of singing for patients with Moyamoya disease, a rare chronic cerebrovascular occlusion condition. A Hong Kong housewife in her 50s lost consciousness while singing karaoke with friends and was subsequently diagnosed with an ischemic stroke caused by Moyamoya disease. The condition causes abnormal blood vessels in the brain to become extremely sensitive to carbon dioxide levels, making activities that induce hyperventilation particularly hazardous. Without proper treatment, patients face progressive cognitive decline and a significant risk of stroke.
Key Points
- Moyamoya disease involves progressive narrowing or occlusion of the internal carotid artery terminus, prompting the brain to develop compensatory tiny blood vessels visible as a smoky haze in angiograms, hence the name derived from the Japanese term
- The disease has two peak onset periods: children aged 5 to 10 years and adults aged 40 to 50 years, with incidence in China at approximately 1.14 per 100,000 population and new cases doubling between 2016 and 2018
- The Hong Kong Rare Disease Alliance has officially recognized Moyamoya disease as a rare disease in the territory, reflecting growing awareness of its impact on local patients
- Adult symptoms include unilateral limb weakness, dizziness, convulsions, slurred speech, and blurred vision; children may experience persistent headaches, hyperventilation-induced coma during crying, and progressive memory deterioration
- Treatment involves cerebral vascular bypass surgery, with direct bypass connecting scalp vessels to brain vessels for immediate blood flow restoration, or indirect bypass allowing new vessels to grow over 3 to 6 months; post-operative vessel patency exceeds 90%
Why It Matters
Moyamoya disease represents a serious yet underrecognized health threat in Hong Kong, where the doubling of cases in recent years suggests either improved diagnostic capabilities or a genuine increase in prevalence. For patients who remain undiagnosed, everyday activities like singing at family gatherings or helping children with homework could inadvertently trigger devastating cerebrovascular events, making public awareness of this rare condition critically important for early intervention and prevention of irreversible cognitive damage .
Moyamoya disease represents a serious yet underrecognized health threat in Hong Kong, where the doubling of cases in recent years suggests either improved diagnostic capabilities or a genuine increase in prevalence. For patients who remain undiagnosed, everyday activities like singing at family gatherings or helping children with homework could inadvertently trigger devastating cerebrovascular events, making public awareness of this rare condition critically important for early intervention and prevention of irreversible cognitive damage .