Arterial Stiffness and Blood Pressure in Patients Newly Diagnosed with Graves' Disease Compared with Euthyroid

Diana Grove-Laugesen1, Sofie Malmstroem1, Eva Ebbehoj1

  • 1Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark.

Insights

Graves' disease (GD) patients exhibit increased arterial stiffness, measured by 24-hour pulse wave velocity (PWV), and higher pulse pressure compared to controls. These findings may explain the elevated cardiovascular risk in hyperthyroidism.

Area of Science:

  • Cardiology
  • Endocrinology
  • Vascular Physiology

Background:

  • Hyperthyroidism and Graves' disease (GD) are linked to increased cardiovascular morbidity and mortality.
  • The underlying mechanisms, particularly concerning arterial stiffness and blood pressure, remain incompletely understood.

Purpose of the Study:

  • To investigate differences in arterial stiffness (pulse wave velocity, PWV) and blood pressure between patients with newly diagnosed Graves' disease and healthy controls.
  • To determine if established cardiovascular risk factors are altered in GD.

Main Methods:

  • A cross-sectional study comparing 55 patients with newly diagnosed GD and 55 matched euthyroid controls.
  • Measurement of office and 24-hour ambulatory pulse wave velocity (PWV) and blood pressure using SphygmoCor Xcel and Arteriograph devices.
  • Statistical analysis using adjusted linear regression to compare groups.

Main Results:

  • Patients with GD had significantly higher 24-hour PWV compared to controls (adjusted difference: 1.0 m/s).
  • Higher PWV was observed during both day and night in GD patients, with reduced nocturnal PWV dipping.
  • Central and brachial pulse pressure were significantly elevated in GD patients, alongside reduced nocturnal dipping of central pulse pressure. Mean arterial pressure did not differ.

Conclusions:

  • Graves' disease is associated with increased 24-hour arterial stiffness (PWV) and elevated pulse pressure, even with comparable office blood pressure readings.
  • The findings suggest that increased PWV, not detected in standard office measurements, may contribute to the heightened cardiovascular risk in GD.
  • Further longitudinal studies are warranted to confirm if elevated PWV is a key factor in the cardiovascular complications of hyperthyroidism and GD.
Abstract

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