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A new technique to determine the correlation between the QT interval and heart-rate for control and SIDS babiesThe ability of the autonomic nervous system to alter the QT interval in response to heart rate changes is essential to cardiovascular control. An accurate way to determine the relation between QT intervals and their corresponding RR intervals is described. A computer algorithm measures the RR intervals using digital filtering and cross-correlating the QRS sections of consecutive waveforms. The QT intervals is calculated by choosing a section of, the ECG that includes the T wave and cross-correlating it with all the consecutive T waves. At least 4000 pairs of QT-RR intervals are computed for each subject and a best fit correlation function determines the relations between the QT and RR intervals. This technique enables to establish a precise correlation between RR and QT in order to distinguish between control and SIDS babies.
Document ID
20040089155
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Sadeh, D.
(Harvard-MIT Division of Health Sciences and Technology Cambridge, Massachusetts, United States)
Shannon, D. C.
Abboud, S.
Akselrod, S.
Cohen, R. J.
Date Acquired
August 21, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Computers in cardiology
Volume: 13
ISSN: 0276-6574
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: N0001480C0-520
CONTRACT_GRANT: NAG2-327
CONTRACT_GRANT: F3361584C0-601
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Cardiopulmonary

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