Loose rivet how right you are.
I cut out Caffeine due to an echtopic heart beat. I even went as far as to have a full Echo and 24 hour holster tape, because I thought I was about to die! The results from the Echo and holster were completely normal and and I was advised that I should cut caffeine out completely! Since doing so I no longer suffer from the odd echtopic beat!
I didn't appreciate just how sensitive my body was to caffeine and strongly recommend anyone worried about the ecg or BP to cut out caffeine and alcohol ect for at least a week before the medical to allow the body to flush the substances out.
Tug