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J Diabetes Complications ; 34(8): 107617, 2020 08.
Article in English | MEDLINE | ID: mdl-32546420

ABSTRACT

AIMS: To investigate the relationship of unawareness of hypoglycemia with spectral analysis of heart rate variability (HRV) and clinical variables in type 1 diabetes (T1D) individuals. METHODS: Participants with type 1 diabetes mellitus (type 1 diabetes) were prospectively assessed for hypoglycemia awareness using the Pedersen-Bjergaard method and were classified as normal hypoglycemia awareness, impaired hypoglycemia awareness and hypoglycemia unawareness. Indices of HRV in frequency domain were evaluated and Ewing tests were used for the diagnosis of cardiovascular autonomic neuropathy (CAN). RESULTS: Ninety-eight participants with T1D (mean age 26 years, average diabetes duration 13 years, and mean HbA1c 8.4%) were included in this study. The prevalence of hypoglycemia unawareness was 28%. No significant difference was observed on the prevalence of CAN among groups of different hypoglycemia awareness (p = 0.740). On regression analyses, abnormal results of HRV in frequency domain were not associated with unawareness of hypoglycemia. On univariable regression analysis, age, diabetes duration and estimated creatinine clearance were associated with unawareness of hypoglycemia. CONCLUSION: CAN as assessed by Ewing tests and spectral analysis of HRV is not associated with unawareness of hypoglycemia. There is association of age, diabetes duration and renal deficit with unawareness of hypoglycemia.


Subject(s)
Autonomic Nervous System Diseases/diagnosis , Awareness , Diabetes Mellitus, Type 1/complications , Diabetic Neuropathies/diagnosis , Heart Rate/physiology , Hypoglycemia/psychology , Adolescent , Adult , Autonomic Nervous System Diseases/etiology , Autonomic Nervous System Diseases/psychology , Diabetes Mellitus, Type 1/physiopathology , Diabetes Mellitus, Type 1/psychology , Diabetic Neuropathies/etiology , Diabetic Neuropathies/psychology , Female , Humans , Hypoglycemia/diagnosis , Hypoglycemia/etiology , Male , Middle Aged , Prospective Studies , Young Adult
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