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Study of Cardiac and Paroxysmal Abnormalities in Rett Syndrome

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: February 25, 2000
Last Update Posted: December 9, 2005
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Baylor College of Medicine
Information provided by:
Office of Rare Diseases (ORD)

OBJECTIVES: I. Evaluate electrocardiographic parameters, including QT and PR intervals and QRS morphology/duration, across clinical stages in patients with Rett syndrome.

II. Characterize abnormalities of cardiac conduction and repolarization. III. Assess arrhythmias, heart rate variability, and autonomic nervous system function in these patients using 24-hour Holter monitoring.

IV. Record events believed to represent seizures with video, electroencephalogram (EEG), and polygraph monitoring in patients who have more than 1 clinical seizure every 5 days.

V. Characterize these events with respect to clinical manifestations, EEG correlates, and other physiologic data.

VI. Determine the frequency of seizures vs. events without electrographic correlates in these patients.

VII. Determine whether Rett syndrome patients have characteristic or unique types of seizures and/or an epileptic syndrome.

Rett Syndrome

Study Type: Observational
Study Design: Primary Purpose: Screening

Resource links provided by NLM:

Further study details as provided by Office of Rare Diseases (ORD):

Estimated Enrollment: 95
Study Start Date: August 1995
Estimated Study Completion Date: June 1997
Detailed Description:

PROTOCOL OUTLINE: Patients receive an electrocardiogram at baseline and every 6 months for 3 years. Clinical stage II patients undergo 24-hour Holter monitoring on the same schedule; age-matched controls are tested once.

A group of patients with more than 1 seizure or possible seizure every 5 days undergo 5-day continuous electroencephalogram/polygraphic/video monitoring, with respiratory effort assessment, end tidal carbon dioxide and oxygen saturation levels, and a seizure log.


Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
  • Classical Rett syndrome meeting Rett Syndrome Diagnostic Work Group criteria
  • Age-matched girls without neurologic or cardiac problems entered as controls
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00004773

Sponsors and Collaborators
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Baylor College of Medicine
Study Chair: Daniel G. Glaze Baylor College of Medicine
  More Information

ClinicalTrials.gov Identifier: NCT00004773     History of Changes
Other Study ID Numbers: 199/11798
First Submitted: February 24, 2000
First Posted: February 25, 2000
Last Update Posted: December 9, 2005
Last Verified: January 1997

Keywords provided by Office of Rare Diseases (ORD):
Rett syndrome
neurologic and psychiatric disorders
rare disease

Additional relevant MeSH terms:
Rett Syndrome
Pathologic Processes
Mental Retardation, X-Linked
Intellectual Disability
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Genetic Diseases, X-Linked
Genetic Diseases, Inborn
Heredodegenerative Disorders, Nervous System