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Causes
Some possible causes of PVC in adults include the use of cocaine, amphetamines,
alcohol, and tobacco. Medicines including digoxin, sympathomimetics, tricyclic
antidepressants, and aminophylline have also been known to trigger attacks of
PVC.
Heart conditions or a previous history of heart attack, ischemia, myocarditis,
dilated or hypertrophic cardiomyopathy, myocardial contusion, atrial
fibrillation and mitral valve prolapse may cause PVC. Patients with
hypomagnesemia, hypokalemia, and hypercalcemia may also present with PVC.
PVCs in young children are thought to be associated with developmental factors
of the autonomic nervous system. In older children, sympathomimetic drugs, such
as cold or asthma medication may cause PVCs, along with mild cases of viral
myocarditis, and excessive caffeine.
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