Thyroid and Its Ripple Effect: Impact on Cardiac Structure, Function, and Outcomes

Area of Science:

• Endocrinology
• Cardiology
• Molecular Biology

Background:

• Thyroid dysfunction, including hyperthyroidism and hypothyroidism, is a prevalent endocrine disorder impacting millions globally.
• Thyroid hormones (thyroxine and triiodothyronine) are critical regulators of cellular metabolism and cardiovascular function.
• The cardiovascular system is particularly sensitive to disruptions in thyroid hormone levels.

Purpose of the Study:

• To explore the intricate relationship between thyroid dysfunction and cardiac dynamics.
• To examine the molecular, cellular, and systemic changes underlying this interaction.
• To provide a comprehensive overview of thyroid dysfunction's effects on cardiac structure, function, and clinical outcomes.

Main Methods:

• Comprehensive review of clinical, molecular, and epidemiological research.
• Analysis of the impact of thyroid hormones on cardiac muscle cells (contraction, electrical properties, hypertrophy).
• Examination of systemic factors including vascular dynamics, neurohormonal control, and endothelial function.

Main Results:

• Thyroid dysfunction influences cardiac contractility, electrical stability, and structural integrity.
• The interaction between thyroid dysfunction and the cardiovascular system is bidirectional.
• Manifestations range from subtle electrical changes to significant structural abnormalities and impaired diastolic function.

Conclusions:

• Thyroid dysfunction is strongly correlated with adverse cardiovascular outcomes, including heart failure and arrhythmias.
• A thorough understanding of the molecular mechanisms and systemic consequences is essential.
• This review aims to inform clinical practice and guide future research in managing cardiovascular complications of thyroid disorders.