Table 1: Effects of Low Triiodothyronine (T3) and on the Cardiovascular system.
Indirect Effect on Cardiovascular Function
Mild hypertension
Narrowed pulse pressure
High serum concentrations of cholesterol
High serum concentrations of creatinine kinase (specifically CK-MM)
Pericardial effusions
Non-Pitting edema (myxedema)
Cardiac arrhythmias (Torsade de pointes)
Accelerated atherosclerosis and coronary artery disease
Increased carotid intimal thickening
Impaired endothelial-dependent vasodilation
Direct Effect on Cardiovascular Function
Increase systemic vascular resistance
Decrease heart rate
Decrease ejection fraction
Decrease cardiac output
Increase isovolumetric relaxation time
Decrease blood volume