Med Biol Eng Comput - Asymmetric properties of long-term and total heart rate variability.

Tópicos

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Resumo

We report on two new physiological phenomena: the long-term and total heart rate asymmetry, which describe a significantly larger contribution of heart rate accelerations to long-term and total heart rate variability. In addition to the existing pair of indices, SD1(d); SD1(a); which are based on partitioning short-term variance, we introduce two other pairs of descriptors based on partitioning longterm (SD2(d); SD2(a)) and total (SDNN(d); SDNN(a)) heart rate variability. The new asymmetric descriptors are used to analyze RR intervals time series derived from the 30-min ECG recordings of 241 healthy subjects resting in supine position. It is shown that both new types of asymmetry are present in 76% of the subjects. The new phenomena reported here are real physiological findings rather than artifacts of the method since they vanish after data shuffling.

Resumo Limpo

report two new physiolog phenomena longterm total heart rate asymmetri describ signific larger contribut heart rate acceler longterm total heart rate variabl addit exist pair indic sdd sda base partit shortterm varianc introduc two pair descriptor base partit longterm sdd sda total sdnnd sdnna heart rate variabl new asymmetr descriptor use analyz rr interv time seri deriv min ecg record healthi subject rest supin posit shown new type asymmetri present subject new phenomena report real physiolog find rather artifact method sinc vanish data shuffl

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