Elsevier

Journal of Cardiac Failure

Volume 9, Issue 5, October 2003, Pages 375-379
Journal of Cardiac Failure

The use of implantable cardioverter-defibrillators in pediatric patients awaiting heart transplantation

https://doi.org/10.1054/S1071-9164(03)00128-3Get rights and content

Abstract

Background

This multicenter study evaluated experience with implantable cardioverter defibrillators (ICD) as a bridge to orthotopic heart transplantation (OHT) in children.

Methods

The application of ICD therapy continues to expand in pediatric populations, due in part to improved technology and new indications, including the prevention of sudden death while awaiting OHT.

Methods

We performed a retrospective review of ICD databases at 9 pediatric transplant centers.

Results

Twenty-eight patients (16 males) underwent implantation or had a preexisting ICD while awaiting OHT between 1990 and 2002. The median age at implant was 14.3 years (11 months to 21 years) with a median weight of 49 kg (11.7-88 kg). Diagnoses included cardiomyopathy (n = 22), and congenital heart disease (n = 6). Indications for ICD implantation included ventricular tachycardia/fibrillation (n = 23), syncope (n = 5), aborted sudden death with no documentation of rhythm disturbance (n = 5), ventricular ectopy (n = 1), and poor function (n = 5). Of the 28 ICDs, 23 were implanted by a transvenous approach and 5 by epicardial route. There were 55 defibrillator discharges in 17 patients, 47 (85%) of which (in 13 patients) were appropriate. The 8 inappropriate discharges (in 6 patients) were triggered by sinus tachycardia, inappropriate sensing, and atrial flutter. The mean time from implantation to first appropriate shock was 6.9 months (1 day to 2.6 years). Twenty-one patients underwent transplantation during the study period, whereas 2 died while awaiting a donor. Morbidity included a lead fracture, 3 episodes of electromechanical dissociation, and 1 episode of electrical storm.

Conclusions

ICD implantation represents an effective bridge to transplantation in pediatric patients. The complication rate is low, with inappropriate device discharge due primarily to sinus tachycardia or atrial flutter. There is a high incidence of appropriate ICD therapy for malignant ventricular arrhythmias in this highly selected group of patients.

Section snippets

Methods

We performed a retrospective review of patient records and clinical databases at 9 pediatric cardiology centers: Stanford University; University of California, San Francisco; The Children’s Hospital, Boston; University of Southern California; University of Utah; Sick Children’s Hospital, Toronto; Children’s Hospital and Regional Medical Center, Seattle; Children’s Hospital Denver; and Texas Children’s Hospital, Houston. Inclusion criteria for entry into the study were as follows:

  • 1.

    Patients

Patients

A total of 28 patients (16 males) were eligible for inclusion. The median age at implant was 14.3 years (11 months to 21 years) with a median weight of 49 kg (11.7-88 kg) (Table 1). There were 6 patients who were ≤10 years of age, and 22 between the ages of 11 and 21. Twenty-one patients successfully received cardiac transplantation and 2 patients died from refractory congestive heart failure while awaiting a donor.

The most common diagnosis in this patient population was cardiomyopathy (Table 2

Discussion

There has been much interest in the use of ICD therapy for prevention of sudden death in adult patients awaiting transplant.14., 15. Brugada and colleagues found that 71% of their patients with malignant ventricular arrhythmias awaiting transplant had appropriate discharges. No such studies have been performed in the pediatric population, which is, in many important respects, a distinct group with a different heart failure substrate. The indications for the use of ICD therapy in pediatric

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