Summary
Spectral analysis of heart rate variability (HRV) was used to assess the autonomic nervous control of cardiac function during orthostatic load in insulin-dependent diabetic patients and healthy subjects. The diabetic patients were divided into three groups: diabetics without neuropathy (group 1), diabetics with peripheral neuropathy (group 2), and diabetics with peripheral and autonomic neuropathy (group 3). Resting mid-frequency (MF, 0.05–0.15 Hz) and respiration-related (RF, power around respiration rate) HRV were significantly lower in group 2 and 3 diabetics than in controls, indicating a reduced parasympathetic nervous system influence on the heart. Standing MF and RF spectral power data were significantly lower in all diabetic groups than in controls, suggesting marked alterations in the autonomic cardiovascular control during a mild physical load not only in symptomatic diabetics but also in patients with no signs and symptoms of neuropathy. The difference between supine and standing MF power, an estimate ofβ-adrenergic influence on the heart, was significantly lower in all diabetic subject groups studied than in controls. This suggests a reduced sympathetic nervous system influence on the heart in diabetic patients. Our data suggest that computerized spectral analysis of HRV during orthostatic load seems to be a very sensitive method of evaluating of the autonomie nervous systems influence on the heart in patients suffering from diabetes niellitus.
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Abbreviations
- dB:
-
decibel
- HRV:
-
heart rate variability
- LF:
-
low-frequency component
- MF:
-
mid-frequency component
- RF:
-
respiration related frequency component
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Weise, F., Heydenreich, F., Gehrig, W. et al. Heart rate variability in diabetic patients during orthostatic load — A spectral analytic approach. Klin Wochenschr 68, 26–32 (1990). https://doi.org/10.1007/BF01648886
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DOI: https://doi.org/10.1007/BF01648886