Natural History and Results of Dual Chamber (DDD) Pacemaker Therapy of Children With Obstructive Hypertrophic Cardiomyop...

Obstructive Hypertrophic Cardiomyopathy (HCM) in Children: Natural History and Results of Dual Chamber (DDD) Pacemaker Therapy

Status

Completed

Phases

Phase 1

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00001396

Enrollment

100

Registered

1999-11-04

Start date

1993-10-06

Completion date

2008-07-23

Last updated

2017-07-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypertrophic Cardiomyopathy

Keywords

Pacemaker, Pediatric, Obstructive HCM

Brief summary

Several studies have shown that specialized pacemaking devices (DDD pacing) can improve the symptoms associated with hypertrophic cardiomyopathy (HCM) in adults. In addition, studies have also shown that specialized pacemaking devices (DDD pacing) can improve conditions of HCM in children. However, growth of the body and organs, including the heart, is very rapid during childhood. Therefore the long-term effects of DDD pacing in children are unknown. The purpose of this study is to examine the growth rate and nutrition of children with HCM. Due to this heart condition and the restrictions that are often placed on the child's activity level, children with HCM may grow at a slower rat and may have a greater tendency to be overweight. Children participating in the study will have their growth rate and nutritional status measured before the study begins and throughout the course of the study. Findings in this research study will not directly benefit the patients participating in it. However, information gathered as a result of this study may lead to improvements in the management of children with HCM in the future.

Detailed description

Several studies have shown that dual chamber (DDD) pacemaker therapy relieves LV outflow obstruction and improves symptoms in most adult patients with obstructive hypertrophic cardiomyopathy (HCM). It is however, uncertain whether DDD pacing will be efficacious in children with obstructive HCM, because of evolving cardiac morphology and increased LV hypertrophy and outflow obstruction associated with rapid body growth. We propose to monitor clinical progress, and cardiac morphologic and hemodynamic changes over several years following implantation of a DDD pacemaker in children who present with obstructive HCM between the ages of 5 to 15 years. Functional status, myocardial ischemia, arrhythmias, and LV outflow obstruction will be evaluated by exercise tests, echocardiography, thallium scintigraphy, Holter monitoring, electrophysiologic and cardiac catheterization studies. The results of pacemaker therapy will be compared with the findings in a cohort of young patients with obstructive HCM who elect not to be treated with DDD pacemaker.

Interventions

DEVICEParagon Pacemaker

Study design

Primary purpose

TREATMENT

Eligibility

Sex/Gender

ALL

Age

5 Years to 20 Years

Healthy volunteers

Inclusion criteria

* INCLUSION CRITERIA: DDD Pacemaker Therapy Children of either gender, aged 5 to 15 years. Presence of LV hypertrophy and LV outflow obstruction.

Exclusion criteria

DDD Pacemaker Therapy Other systemic disease that prevent evaluation by echocardiography or cardiac catheterization. Chronic atrial fibrillation. Positive pregnancy test. INCLUSION CRITERIA: Cohort Study Children of either gender, 5 to 20 years (children greater than 15 years will be included if there is access to reliable previous catheterization data). Presence of LV hypertrophy and LV obstruction.

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026