Key result
In 30-minute resting ECG recordings of healthy young adults, long-term and total heart rate asymmetry were present in 76.4% of subjects, demonstrating a significantly larger contribution of heart rate accelerations to long-term and total heart rate variability (P<0.0001).
Cross-Sectional (n=241)
p-value: p=<0.0001
Introduces new descriptors for long-term and total heart rate variability, demonstrating that heart rate accelerations contribute significantly more to variability in healthy subjects.
Accelerations dominate long-term HRV in most healthy adults; extends descriptors but leaves open prognostic validation in disease.
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.
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Piskorski et al. (2011) conducted a cross-sectional in Healthy (n=241). Heart rate asymmetry evaluation via Poincare plots vs. Shuffled data (symmetric heart rate variability) was evaluated on Presence of long-term and total heart rate asymmetry (SD2d < SD2a and SDNNd < SDNNa) (p=<0.0001). In 30-minute resting ECG recordings of healthy young adults, long-term and total heart rate asymmetry were present in 76.4% of subjects, demonstrating a significantly larger contribution of heart rate accelerations to long-term and total heart rate variability (P<0.0001).
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