Seth you should advise your friend to see a cardiologist. Having that many PVC's is not normal. Its normal for everyone to have a few PVC's ( from babies to the elderly)but from your description she is experiencing far to many for a healthy young person. Clinically we normally treat when a patient experiences 10 PVc's a min. So I expect they may want to have a 24 hr tape of her heart rhythm.
Possible causes:
- Hypertension.
- Heart disease, including acute myocardial infarction, valvular heart disease, cardiomyopathy, ventricular hypertrophy and cardiac failure.
- Electrolyte disturbances, including hypokalaemia, hypomagnesemia, hypercalcaemia.
- Drugs, including digoxin, aminophylline, tricyclic antidepressants, cocaine, amfetamines.
- Alcohol excess.
- Infection.
- Stress.
- Surgery.
- Hyperthyroidism.
- Possibly, central sleep apnoea is linked to ventricular ectopics (VE's)
- Stimulants such as caffeine may have a role, although this has not been proven for ventricular extrasystoles