Complications of Hypothyroidism

Hypothyroidism—commonly abbreviated as “hypo”—is a disorder characterized by reduced metabolic activity, typically resulting from decreased synthesis and secretion of thyroid hormones or diminished physiological response to these hormones. So, what are the potential complications of hypothyroidism? Let’s explore them below.

Complications of Hypothyroidism

First, patients may develop bradycardia (abnormally slow heart rate) accompanied by cardiac enlargement—a condition known as pericardial effusion—which can severely impair cardiac function. This often leads to myocardial dysfunction and, ultimately, heart failure.

Second, some patients with hypothyroidism experience elevated blood pressure during treatment and thus require antihypertensive medications for blood pressure control. In most cases, blood pressure returns to normal after successful treatment of hypothyroidism.

Third, because patients with hypothyroidism take thyroid hormone replacement therapy, they may develop angina pectoris. Prolonged use of such hormonal agents may even exacerbate angina symptoms. However, when treating angina, clinicians frequently encounter bradycardia. Moreover, thyroid hormone replacement therapy in hypothyroid patients may disrupt multiple organ systems and predispose them to cardiomyopathy.

Clinical Manifestations of Hypothyroidism

1. Pallor; periorbital and malar puffiness; apathetic facial expression; generalized dryness, thickening, and roughness of the skin with scaling; non-pitting edema; and hair loss.

2. Neurological and psychiatric manifestations: impaired memory, intellectual decline, excessive somnolence, slowed mental processing, anxiety, dizziness, headache; in severe cases, dementia or even stupor may occur.

3. Cardiovascular manifestations: bradycardia, reduced cardiac output, hypotension, cardiac enlargement, increased risk of coronary artery disease, and occasionally pericardial or pleural effusions.

4. Gastrointestinal manifestations: anorexia, abdominal distension, constipation. Impaired gallbladder motility may lead to cholecystomegaly. Approximately half of patients exhibit gastric hypochlorhydria, which may contribute to pernicious anemia and iron-deficiency anemia.

We hope the above information is helpful to you.