What are CPVT Symptoms?
With CPVT, the heart has a normal structure and a normal rhythm when at rest. But when a person’s nervous system is suddenly stimulated, their heart rhythm can become dangerously irregular. This can happen in situations that cause a surge of adrenaline, such as if a person is startled or is exercising.
Fainting, called syncope, is the main symptom. (There are far more common reasons for fainting, though.) Sometimes the first symptom is sudden cardiac arrest.