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J Appl Physiol (June 27, 2003). doi:10.1152/japplphysiol.01110.2002
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Submitted on December 4, 2002
Accepted on June 20, 2003

Deriving Heart Period Variability From Blood Pressure Waveforms

Paula S McKinley1*, Peter A Shapiro1, Emilia Bagiella2, Michael M Myers3, Ronald E De Meersman4, Igor Grant5, and Richard P Sloan1

1 Department of Psychiatry, Columbia University, College of Physicians and Surgeons, New York, NY, USA
2 Department of Biostatistics, Columbia University, Mailman School of Public Health, New York, NY, USA
3 Division of Developmental Psychobiology, New York State Psychiatric Institute, New York, NY, USA
4 Department of Rehabilitation Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
5 Department of Psychiatry, University of California, San Diego, and VA Healthcare System, San Diego, CA, USA

* To whom correspondence should be addressed. E-mail: pm491{at}columbia.edu.

International standards for calculating heart period variability (HPV) from a series of R-wave intervals (RR) in an electrocardiographic (ECG) recording have been widely accepted. It is possible, and potentially useful in various settings, to use systolic blood pressure (SBP) waveform intervals to estimate HPV, but the validity of BP-derived HPV has not been established. To test the reliability between BP- and ECG-derived HPV indices, we evaluated data from 234 healthy adults in four studies of HPV reactivity to stress. Study conditions included resting baseline, arithmetic, Stroop test, speech presentation, and orthostatic tilt. Continuous ECG and BP recordings were sampled at a rate of 500 Hz, scored using the same methods, and used to calculate heart rate and time and frequency domain measures of HPV. Overall, reliability between the two methods was very high for computing heart rate and HPV indices. High frequency HPV indices were somewhat less reliably computed. In conclusion, in healthy adults, with the use of appropriate methods, BP waveforms can produce reliable indices of HPV.




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