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Cardiovascular autonomic neuropathy as a cause of fatigue in chronic hypoparathyroidism

Abstract

Purpose

Hypoparathyroidism (hypoPT) results in an impairment of quality of life (QoL), an increase in fatigue and a higher risk of mortality. Cardiovascular autonomic neuropathy (CAN) is an impairment of the cardiovascular autonomic system and is associated with increased mortality and fatigability. Patients with hypoPT show an increased risk of CAN. However, no previous studies have investigated the association between CAN and QoL in hypoPT. To test whether CAN is associated with fatigue and impaired QOL in hypoPT patients.

Methods

We enrolled 48 subjects with postsurgical hypoPT treated with calcium and calcitriol and 38 healthy subjects who underwent thyroidectomy. Subjects completed the RAND 36-Item Short Form (SF-36) Health Survey, evaluating physical (PCS) and mental (MCS) health, and fatigue score. CAN was assessed using cardiovascular autonomic reflex tests (CARTs). Participants were considered to have “early CAN” (EC) if they had one abnormal CART and “definite CAN” (DC) with two or more abnormal CARTs.

Results

Compared with controls, hypoPT population had lower fatigue scores (44.5 IQRː9 vs 38.5 IQRː12.3, P = 0.031). In the hypoPT group, only participants with DC had a lower fatigue score than subjects without CAN (DC: β: −9.55, P = 0.005) after adjusting for age, duration of disease, calcium concentration, TSH, calcitriol and calcium supplementation. No differences were found in the PCS and MCS scores in the hypoPT group.

Conclusions

CAN may explain fatigue, a common complaint of postsurgical hypoPT patients. Further larger and prospective investigations are needed to confirm our findings.

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Authors' contributions

Study design: GT, AP. Study conduct: GT, AMN, AMDT, PP, SM, and AP. Data collection: GT, AMN, AMDT, DM, AS, RC, DB, and AP. Data analysis: CP and DL. Data interpretation: GT, AMN, CP, DL, and AP. Drafting manuscript: GT, AMN, and AP. Revising manuscript content: GT, AMN, AMDT, DM, AS, RC, DB, PP, SM, and AP. Approving final version of manuscript: GT, AMN, DM, AMDT, AS, RC, DB, GG, PP, SM, and AP. GT, AMN, and AP take responsibility for the integrity of the data analysis.

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Correspondence to Andrea Palermo.

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The authors declare that they have no conflict of interest.

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The study was conducted in compliance with the Declaration of Helsinki and its later amendments or comparable ethical standards. The research protocol was approved by the Ethics Committee at the University Campus Bio-Medico of Rome.

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Informed consent was obtained from all individual included in the study.

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Tabacco, G., Naciu, A.M., Cesareo, R. et al. Cardiovascular autonomic neuropathy as a cause of fatigue in chronic hypoparathyroidism. Endocrine 67, 198–203 (2020). https://doi.org/10.1007/s12020-019-02101-w

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Keywords

  • Cardiovascular Autonomic Neuropathy
  • Fatigue
  • Hypoparathyroidism
  • Quality of life, PTH