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10 November 2009
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Sudden adult death syndrome

Dr Trisha Macnair

Sudden adult death syndrome encompasses a range of conditions. Cardiac arrhythmias are a common cause and one in particular, long QT syndrome, may be genetic in origin.


Are there warning signs?

Sometimes there are no warning signs, but in other cases people can experience dizziness or fainting spells. Sudden loss of consciousness or death often occurs during physical exercise or emotional upset.

The frequency of the condition isn't fully known as many sudden deaths are put down to accidents. But research has indicated that about 500 deaths a year in the UK are because of sudden arrhythmic death syndrome.

Can it be diagnosed?

Inheritance is dependent on the syndrome, but some conditions are autosomal dominant, others are autosomal recessive and some are acquired, due to medication.

As more people become aware of the syndromes, more families and individuals are being diagnosed as being at risk.

In some situations, the use of beta blocker medications are effective in 90 per cent of cases. In other cases, surgery might be appropriate.

This article was last medically reviewed by Dr Rob Hicks in December 2006.


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