Electrocardiography Data Analysis in Sleep Disorders (Holter)
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|ClinicalTrials.gov Identifier: NCT02188498|
Recruitment Status : Completed
First Posted : July 11, 2014
Last Update Posted : January 4, 2019
|Condition or disease||Intervention/treatment|
|Sleep Disorders Sleep Apnea Sleep Disordered Breathing||Procedure: Polysomnography|
This study aims to use novel analyses of electrocardiogram data to detect the presence and type of respiratory event observed in patients during sleep. Our specific aims include: determining the accuracy of using a non-invasive electrocardiogram (ECG) to detect sleep apnea and to distinguish between obstructive sleep apnea (OSA) and Cheyne-Stokes Respiration (CSR). For this investigator-initiated study, data from approximately 400 consecutive patients presenting to the Weill Cornell Center for Sleep Medicine for polysomnography will be collected. A sample size of 45 subjects in each group will be needed to quantify mean amplitude change in the ECG derived respiratory signal. Study procedures are outlined below. Standard and novel, research measurements from the ECG will be correlated with findings from polysomnography and used to assess the presence and severity of a variety of ECG-based measures of cardiovascular disease, such as left ventricular hypertrophy and prior Q-wave myocardial infarction. Subjects will also have to complete a Questionnaire prior to their ECG at their visit.
- Subjects will be asked to complete a brief questionnaire (see attached). This questionnaire will ask questions relating to subjects' sleep patterns, etc. Potential risks include possible discomfort while completing the questionnaire.
- Continuous 12-lead ECG recordings, using torso-located electrodes, will be obtained with Mortara Instrument H12+ recorders. An MTA Agreement has been established for the use of this equipment for the duration of this study. Electrocardiograms will be obtained in standard clinical fashion using GE Medical Systems equipment. Patients will be asked to lie in the supine position and 10 recording electrodes will be applied. With the patient lying quietly, a 10 second digital ECG will be recorded and then downloaded via analog modem to the MUSE ECG analysis and storage system at New York Presbyterian Hospital where it will be stored on a dedicated site of our password protected MUSE server. ECG information:12-lead ECGs will be downloaded from the MUSE system to a secure network drive and then copied to the hard drive of a password protected computer where they will be batch-analyzed using an ECG research analysis program, Magellan, provided by GE Medical Systems. Magellan will generate a series of measurements from each ECG and will then export these measurements to an Excel file which will be converted to SPSS files for data analysis. Deidentified ECG data may be downloaded to the Electrocardiography data center and transferred using a secure file transfer system, such as Cornell's file transfer website, to an outside company (Mortara, Inc.) for further analysis as needed.
- Standard polysomnography will be performed for 12 hours at approximately the patients regular sleep time. Sleep data will be recorded in a digitized system and analyzed using Grass Twin software ® (Middleton, WI) for the determination and classification of respiratory events and other sleep related parameters. The Apnea-Hypopnea Index (AHI) will be calculated by computing the average number of obstructive apneas plus obstructive hypopneas per hour of sleep. Obstructive sleep apnea (OSA) is here defined by an AHI ≥5. Intermittent hypoxemia (IH) will be determined by the number of periods ≥6 sec with SaO2 drops ≥4%. Cheyne-Stokes Respiration will be determined by the typical crescendo-decrescendo pattern on the respiratory flow signal, chest and thoracic impedance, using standard criteria. Total duration of CSR will be calculated for the determination of the % of sleep time on CSR. Data regarding percentage of sleep time at SaO2 ≤90% (%TST<90) and lowest saturation level (LowSaO2) will also be recorded.
Upon completion of data attainment some de-identified data will be remote analyzed.
|Study Type :||Observational|
|Actual Enrollment :||120 participants|
|Official Title:||Electrocardiography Data Analysis in Sleep Disorders|
|Study Start Date :||September 2013|
|Actual Primary Completion Date :||November 2017|
|Actual Study Completion Date :||December 2017|
Polysomnography with Holter monitoring
Patients will undergo resting electrocardiogram (ECG) test at the beginning of the night and be monitored by a Holter device for the duration of the sleep study.
Polysomnography, also called a sleep study, is a test used to diagnose sleep disorders. Polysomnography records your brain waves, the oxygen level in your blood, heart rate and breathing, as well as eye and leg movements during the study.
- Heart rate variability [ Time Frame: One night of sleep study ]The variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval.
- Analysis of QRS morphology [ Time Frame: One night of sleep study ]The variation in the QRS waves.
- electrocardiogram signal [ Time Frame: One night of sleep study ]Variation and analysis in the ecg signal.
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): NCT02188498
|United States, New York|
|Weill Cornell Center for Sleep Medicine|
|New York, New York, United States, 10065|
|Principal Investigator:||Ana Krieger, MD||Weill Medical College of Cornell University|