TY - JOUR

T1 - A probability analysis of heart rate variability for heart transplant and myocardial infarction patients and for healthy subjects

AU - Saermark, K.

AU - Lewkowicz, M.

AU - Levitan, J.

AU - Moelgaard, H.

AU - Boberg, B.

AU - Pehrsson, S.

AU - Block Thomsen, P. E.

PY - 2001/9

Y1 - 2001/9

N2 - We present a probability analysis of RR interval series. The analysis is based on a subdivision of the RR interval series into segments - here called m-segments - ranging from one local RR maximum value to the consecutively following local RR maximum value; such segments represent full cycles of acceleration followed by deceleration of the heart rate. We analyze the properties of m-segments in terms of the probability of observing j RR values in the segment and in terms of the probability of observing a change of Δj in going from one m-segment to the following m-segment. We also calculate the rms-values, σm, of the m-segments and introduce an entropy measure to characterize the RR interval series. Further, we present a simple model for phase-space-trajectory plots for RR interval series and an estimate of the spectral properties in terms of the parameters j and σm. The results are based on 24-hour RR interval series for ten heart transplant patients, with a total of 23 recordings, for 326 myocardial infarction patients and 104 healthy subjects. The results obtained show characteristic differences between the behavior of the three groups, but no attempt at a clinical interpretation is made.

AB - We present a probability analysis of RR interval series. The analysis is based on a subdivision of the RR interval series into segments - here called m-segments - ranging from one local RR maximum value to the consecutively following local RR maximum value; such segments represent full cycles of acceleration followed by deceleration of the heart rate. We analyze the properties of m-segments in terms of the probability of observing j RR values in the segment and in terms of the probability of observing a change of Δj in going from one m-segment to the following m-segment. We also calculate the rms-values, σm, of the m-segments and introduce an entropy measure to characterize the RR interval series. Further, we present a simple model for phase-space-trajectory plots for RR interval series and an estimate of the spectral properties in terms of the parameters j and σm. The results are based on 24-hour RR interval series for ten heart transplant patients, with a total of 23 recordings, for 326 myocardial infarction patients and 104 healthy subjects. The results obtained show characteristic differences between the behavior of the three groups, but no attempt at a clinical interpretation is made.

UR - http://www.scopus.com/inward/record.url?scp=0345773918&partnerID=8YFLogxK

U2 - 10.1142/S0218348X01000762

DO - 10.1142/S0218348X01000762

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AN - SCOPUS:0345773918

SN - 0218-348X

VL - 9

SP - 273

EP - 285

JO - Fractals

JF - Fractals

IS - 3

ER -