Atrial tachyarrhythmias in neonatal enterovirus myocarditis.

Enterovirus myocarditis can be a serious infection in neonates, complicated by cardiac dysfunction and arrhythmias. Although decreased systolic function and ventricular arrhythmias have been reported, there is limited description of significant atrial involvement. We present an unusual series of three infants at our institution with enterovirus myocarditis in the neonatal period associated with atrial arrhythmias and dilation.