Ventricular rhythm with intermediate rate in the neonate without heart disease.

Nonsustained, sustained, or incessant AVR, a form of VRIR, although infrequent, can present in the neonatal period. It must be considered in the differential diagnosis of wide QRS tachycardia. It seems to be different from VI, and it is asymptomatic and self-limited. It has good long-term prognosis and requires no treatment. These patients should not undergo invasive diagnostic evaluation unless symptoms develop.