The Link Between Systolic and Diastolic Blood Pressure

7. Diastolic Hypotension

Diastolic hypotension or low diastolic pressure is typically caused by severe hypotension or stiff arteries. Many factors can contribute to low blood pressure, including bradycardia, heart failure, and heart valve problems. Other conditions can cause hypotension, too, such as an over or underactive thyroid, adrenal insufficiency, dehydration, and hypoglycemia. Very stiff arteries can also cause low diastolic pressure, which can happen because of diabetes, vascular disease, or as a side effect of normal aging.