The most recent victim was a pensioner, thought to be having fun with the help of anti-impotence medication.
His death followed a series of other incidents, some fatal, in which heart attacks have claimed brothel customers in the area.
The sex trade in the pretty, lakeside Swiss town is also being fuelled by prostitutes from South America and Eastern Europe who enter the country via Italy.
Local health experts are said to have backed the plans to stock defibrillators in sex clubs and brothels. Defibrillators work by delivering a controlled electric shock to the heart to restore a normal heartbeat, after it has stopped.