A woman from West Sussex, England, who blamed dizzy spells and a racing heartbeat on poor fitness discovered she had two rare heart abnormalities. Denisa Fraser was diagnosed with Wolff-Parkinson-White syndrome and a rare coronary sinus diverticulum after a routine workplace health assessment in London. Following two operations, including an eight-hour procedure, Denisa is now symptom-free and urging others not to ignore persistent heart symptoms.