Cited by 29Thyroid Disorders and TreatmentsCardiovascular Function and Risk FactorsHormonal and reproductive studies

Thyroid Hormone Substitution Therapy Rapidly Enhances Left-Ventricular Diastolic Function in Hypothyroid Patients

Virtanen, V.K., Saha, H.H.T., Groundstroem, K.W.E., Salmi, J., Pasternack, A.I.·2001·Cardiology

Abstract

Objective: Alterations in thyroid status may lead to changes in both systolic and diastolic function of the heart. Pulsed Doppler echocardiography is a reliable non-invasive means of assessing left-ventricular (LV) diastolic function. The aim of the present study was to evaluate LV diastolic function in patients with primary hypothyroidism receiving thyroxine therapy. Methods: Twelve patients (all females, mean age 47 ± 17, range 16–69 years) with primary hypothyroidism were studied by pulsed Doppler echocardiography. The first examination was made before the start of thyroxine substitution and the second at 37–68 (mean 53 ± 10) days after commencing thyroxine treatment (mean dose 136 ± 22 µg/day). Results: During thyroxine substitution therapy, the hypothyroid patients became clinically euthyroid and serum T4 increased from 51 ± 21 to 119 ± 24 nmol/l; TSH decreased from 50.4 ± 55.3 to 1.2 ± 1.5 mU/l. During therapy, heart rate increased from 61 ± 8 to 68 ± 10 (p = 0.05). The LV posterior wall (7.8 ± 1.0 mm) and interventricular septum thickness (8.0 ± 1.4 mm) were significantly greater in hypothyroid patients than in the control subjects (6.4 ± 1.0 mm, p = 0.007 and 6.8 ± 1.0 mm, p = 0.04, respectively). There was no significant change in LV dimensions and wall thickness during follow-up. E/A max increased significantly during treatment (from 1.679 ± 0.432 to 1.947 ± 0.335, p = 0.006). The isovolumic relaxation time shortened significantly (from 88 ± 23 ms to 75 ± 24 ms, p = 0.005). Conclusions: The present study shows that LV diastolic function as assessed by pulsed Doppler echocardiography in hypothyroid patients is enhanced by thyroxine therapy during a rather short follow-up period.

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Crossref · 10.1159/000047390

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Authors
Virtanen, V. K., Saha, H. H. T., Groundstroem, K. W. E., Salmi, J., & Pasternack, A. I.
Affiliations
Tampere University Hospital (FI)
Venue
Cardiology
Publisher
S. Karger AG
Published
2001
Volume
96
Issue
2
Pages
59-64
ISSN
  • 0008-6312 (ISSN-L)
  • 1421-9751
OpenAlex
W1976293072
Cited by
29
References
25
Citations by year
2024: 1 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 2 · 2016: 2 · 2015: 1 · 2014: 2 · 2013: 1 · 2012: 2
FWCI
0.69
Type
journal article
Language
en
Open access
closed
Locations
  • Cardiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Tays
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Function and Risk Factors
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
Keywords
primary hypothyroidism, left ventricular diastolic function, isovolumic relaxation time, E/A ratio, left ventricular wall thickness, heart rate, thyroid hormone replacement
MeSH terms
Adolescent, Adult, Aged, Blood Pressure, Diastole, Female, Heart Atria, Heart Rate, Heart Septum, Heart Ventricles, Humans, Hypothyroidism, Middle Aged, Thyrotropin, Thyroxine, Time Factors, Reproducibility of Results, Ventricular Function, Left, Echocardiography, Doppler, Pulsed

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