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PEDIATRICS Vol. 107 No. 6 June 2001, pp. 1313-1316

Cisapride Associated With QTc Prolongation in Very Low Birth Weight Preterm Infants

Received Jun 6, 2000; accepted Sep 26, 2000.

Anne Dubin*, Myrna Kikkertparallel , Majid MirmiranDagger , §, and Ronald AriagnoDagger

From the Divisions of * Pediatric Cardiology and Dagger  Neonatal and Development Medicine, Department of Pediatrics, Stanford University, Stanford, California; § Netherlands Institute for Brain Research, Amsterdam, The Netherlands; and the parallel  Leiden University School of Medicine, Leiden, The Netherlands.

Objective.  No systematic study has been performed to evaluate the effect of cisapride on the QT interval in premature infants. Cisapride, which has recently been withdrawn by the Food and Drug Administration and is no longer an approved therapy, was commonly used for preterm infant care to improve the advance of enteral feedings and to reduce reflux and associated apnea. Our aim was to evaluate the effect of recommended doses of cisapride on the QT interval in this population.

Study Design.  Prospective blinded evaluation of electrocardiogram for QT, JT, QTc, and JTc measurements in 25 preterm infants before and after cisapride administration.

Results.  Twelve of 25 infants (48%) developed repolarization abnormalities with cisapride administration: 32% of the infants (8/25) studied had QTc prolongation (>= 0.450 seconds), whereas 10/25 had JTc prolongation (>= 0.360 seconds). Preterm infants <32 weeks significantly prolonged their QTc interval from 0.41 ± 0.02 to 0.44 ± 0.02. The QTc and/or JTc was prolonged in 54% of infants receiving 0.1 mg/kg/dose and 42% receiving 0.2 mg/kg/dose.

Conclusions.  The QTc and JTc interval significantly prolonged in preterm infants <32 weeks on the recommended dose of cisapride therapy. A QTc >= 0.450 seconds developed in 32% of infants treated with cisapride, whereas the JTc prolonged in 40%. A significant percentage of infants (54%) developed prolonged QTc intervals at a dose of 0.1 mg/kg/dose. From these data we conclude that there is a higher risk of prolongation of the QTc interval and risk of arrhythmias with greater prematurity.  Key words:  cisparide, reflux, arrhythmia, preterm infants, prolonged QTc.


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