9. Cardiac Symptoms
Endocrine system disorders, such as hypofunction of the thyroid gland and its respective hormones, have multiple known effects on the cardiovascular system, and thus affect the structure of the heart and its functions. Particularly concerning is the fact that pericardial effusion is a frequent finding in patients with Hypothyroidism. However, the most common cardiac manifestation among hypothyroid patients is bradycardia or abnormal reduction in heart rate. Bradycardia, which results in heart rates below 60 beats per minute is not, in and of itself, a dangerous condition. However, it has the potential to cause significant harm if the heart stops pumping sufficient oxygen-rich blood to the brain and other organs and tissues of the body.
The most frequently observed symptoms of Hyperthyroidism are: