Heart in hypothyroidism--an echocardiographic study

Area of Science:

• Cardiology
• Endocrinology
• Medical Imaging

Background:

• Hypothyroidism is a condition involving underactive thyroid function.
• Cardiovascular complications are common in patients with thyroid dysfunction.
• The specific effects of subclinical versus overt hypothyroidism on cardiac parameters require further elucidation.

Purpose of the Study:

• To prospectively evaluate the cardiac effects of subclinical and overt hypothyroidism.
• To compare echocardiographic findings in hypothyroid patients with a control group.
• To identify structural and functional cardiac alterations associated with different severities of hypothyroidism.

Main Methods:

• Prospective study involving 55 individuals (44 patients, 11 controls).
• Patients categorized into overt (n=22) and subclinical (n=22) hypothyroidism groups.
• Echocardiography (cross-sectional and Doppler) used to assess cardiac structure and function.

Main Results:

• Increased interventricular septum (IVS) dimensions in moderate subclinical and severe overt hypothyroidism.
• Significantly increased left ventricular posterior wall (LVPW) thickness in overt hypothyroidism.
• Pericardial effusion and diastolic dysfunction observed primarily in overt hypothyroidism.

Conclusions:

• Both subclinical and overt hypothyroidism are linked to cardiovascular changes.
• Hypothyroidism affects cardiac structure, notably IVS and LVPW thickness.
• Left ventricular diastolic function is impaired, more so in overt hypothyroidism.