There are several common causes of overall hypotension, which would include a low diastolic number. For some older adults, arteries may become too stiff to spring back between heartbeats, causing diastolic blood pressure to be low. As we age, we lose the elasticity of our arteries. Common brand names include Minipress and Cardura. Because they lower diastolic pressure more than systolic pressure, they may cause isolated diastolic hypotension. These blood pressure medications work by causing your blood vessels to open up (dilate). There are three known causes of isolated diastolic hypotension: Medications You may be at higher risk of this type of heart failure if you have coronary heart disease, which is narrowing of your heart arteries.Ĭauses of low diastolic blood pressure Causes of diastolic hypotension by itself This can lead to weakening of your heart, a condition called diastolic heart failure. If your diastolic blood pressure is too low, your heart muscles won’t get enough oxygenated blood. Unlike the rest of your body, which receives blood when your heart pumps, the muscles of your heart receive blood when your heart relaxes. Low diastolic blood pressure may be particularly dangerous for your heart. This condition is called isolated diastolic hypotension. Some people can have low diastolic pressure even when their systolic pressure is typical. Doctors have started to raise concerns specifically about diastolic blood pressure below 60. If you have hypotension, your systolic pressure measurement is under 90 mm Hg and your diastolic number is under 60 mm Hg. The medical term for low blood pressure is hypotension. High blood pressure can increase your risk of heart disease or stroke, but low blood pressure can also be a problem. The lower number, called your diastolic pressure, is measured when your heart relaxes between beats. The upper number, called your systolic pressure, is measured when your heart beats. This force is measured in millimeters of mercury (mm Hg) and is represented as two numbers. Your blood pressure is the force inside your blood vessels when your heart beats and relaxes.
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