Yes. It is isolated diastolic hypotension. Some people can have low diastolic pressure even when their systolic pressure is normal. This condition is called isolated diastolic hypotension. Low diastolic blood pressure may be particularly dangerous for your heart.
There are three known causes of isolated diastolic hypotension:
- Alpha-blocker medications. These blood pressure medications work by causing your blood vessels to open up (dilate). Because they lower diastolic pressure more than systolic pressure, they may cause isolated diastolic hypotension. Common brand names include Minipress and Cardura.
- The aging process. As we age, we lose the elasticity of our arteries. For some older adults, arteries may become too stiff to spring back between heartbeats, causing diastolic blood pressure to be low.
- Too much salt in your diet. Dietary salt can decrease elasticity of your blood vessels. If you take in too much salt, you may increase your risk for low diastolic blood pressure.
Treating isolated diastolic hypotension is more difficult than treating general hypotension. If you're taking an alpha-blocker, your doctor can change you to a different high blood pressure medication.
If you have isolated low diastolic pressure and you're not on blood pressure medication, the only option may be to see your doctor more frequently for checkups and to watch for symptoms of heart failure. Currently, there isn't any medication available to treat isolated diastolic hypotension.
Treatment of general hypotension depends on the cause.
Overtreatment of high blood pressure can be managed by adjusting or changing medications. The goal is to keep the diastolic blood pressure between 60 and 90 mm Hg. Your doctor may also change other medications that cause hypotension.