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[Myocardial ultrastructure in experimental myxedema]
Arkhiv Patologii
|January 1, 1977
Summary
Total thyroidectomy in rabbits led to myxedema, causing significant cardiac contractile structure changes and weakness. This study details the ultrastructural myocardial alterations observed in this pathological state.
Area of Science:
- Endocrinology
- Cardiovascular Physiology
- Cell Biology
Context:
- Thyroidectomy is a common surgical procedure with potential systemic effects.
- Myxedema, a condition resulting from hypothyroidism, is known to affect cardiovascular function.
- Understanding the cellular mechanisms of cardiac dysfunction in myxedema is crucial for patient management.
Purpose:
- To investigate the metabolic and ultrastructural changes following total thyroidectomy in rabbits.
- To elucidate the impact of myxedema on myocardial ultrastructure and cardiac function.
- To identify the pathological substrates responsible for cardiac weakness in myxedema.
Summary:
- Total thyroidectomy was performed on 18 rabbits, with 9 serving as controls undergoing pseudo thyroidectomy.
- Metabolic parameters (basal metabolism, cholesterol, lipoproteins, phospholipids, ionic blood composition) and myocardial ultrastructure were analyzed pre- and post-operation.
- Significant alterations in myocardial contractile structures were observed, correlating with cardiac weakness in the myxedema state.
Impact:
- Provides detailed ultrastructural evidence of myocardial damage in experimentally induced myxedema.
- Highlights the link between thyroid hormone deficiency and cardiac cellular pathology.
- Contributes to the understanding of cardiovascular complications associated with hypothyroidism.