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[Late potentials in high resolution ECG in thyroid gland dysfunction]

W Schippinger1, W Buchinger, B Schubert

  • 1Internen Abteilung des Krankenhauses der Barmherzigen Brüder Graz-Eggenberg.

Acta Medica Austriaca
|January 1, 1995
PubMed
Summary
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Thyroid dysfunctions, even subclinical ones, can cause abnormal heart rhythms detected by high-resolution ECG (HR-ECG). Early therapy is crucial as these findings indicate a risk for ventricular arrhythmias.

Area of Science:

  • Cardiology
  • Endocrinology
  • Electrophysiology

Context:

  • Thyroid dysfunction is prevalent and affects multiple organ systems.
  • Late potentials in high-resolution ECG (HR-ECG) are associated with ventricular arrhythmias.
  • The impact of subclinical thyroid dysfunction on cardiac electrophysiology is not fully understood.

Purpose:

  • To investigate the relationship between thyroidal dysfunctions and late potential parameters in high-resolution ECG (HR-ECG).
  • To determine if subclinical thyroid dysfunctions significantly alter HR-ECG parameters.
  • To assess the clinical implications of these findings for patient management.

Summary:

  • This study analyzed 278 patients to evaluate the effect of hyperthyroidism and hypothyroidism on HR-ECG late potentials.

Related Experiment Videos

  • Both overt and subclinical thyroid dysfunctions were found to induce late potentials.
  • Significant alterations in HR-ECG were observed even in subclinical cases, highlighting a risk for ventricular arrhythmias.

    • Impact:

    • Subclinical thyroid dysfunctions represent a significant risk factor for cardiac arrhythmias.
    • These findings underscore the importance of timely therapeutic intervention for even mild thyroid abnormalities.
    • In hyperthyroidism, low-dose propranolol can rapidly resolve late potentials, suggesting a potential treatment strategy.