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According to the American Heart Association, diastolic blood pressure refers to the amount of pressure against artery walls between heartbeats or when the heart is at rest. The second number in a blood pressure reading, diastolic pressure is considered normal when it is less than 80.


Treatment for low blood pressure may include adding salt to the diet, the infusion of fluids via an intravenous line or medication to treat the underlying cause of the low blood pressure. Low blood pressure is generally only treated if it is causing symptoms or if blood pressure drops rapidly, accor


Athletes and people who are extremely fit tend to have low blood pressure, explains Mayo Clinic. Conditions that can cause low blood pressure include heart issues, such as heart valve problems and heart attack; endocrine issues, such as thyroid disorders, Addison's disease and low blood sugar; and s


Causes of high diastolic blood pressure include medical conditions such as hypothyroidism, coarctation and adrenal tumors, according to the American Academy of Family Physicians. High diastolic blood pressure usually has no known cause and tends to run in families.


It is possible for a person to black out after standing suddenly due to low diastolic blood pressure, states MedlinePlus. Many other factors, including medications, can affect the blood pressure in day-to-day lives.


If someone has high diastolic blood pressure, it does not necessarily mean that they have high systolic blood pressure, notes the Mayo Clinic. It is possible to have isolated high diastolic or isolated high systolic blood pressure.


According to the Centers for Disease Control and Prevention, systolic blood pressure refers to the pressure blood exerts when the heart beats. Diastolic blood pressure refers to the pressure exerted on the blood vessel walls in between the time the heart beats.


Low blood pressure, or hypotension, occurs when a person's blood pressure measures below 90 for systolic and 60 for diastolic, according to WebMD. Having just one number below these given figures is enough for a person to have hypotension.


Dehydration sometimes causes low blood pressure, according to Mayo Clinic. Dehydration can lead to a life-threatening condition known as hypovolemic shock. The low blood volume reduces the oxygen supply to tissues and, if untreated, can cause death. Other causes include blood loss and heart problems


According to the American Heart Association, effects or symptoms of low blood pressure can include dizziness or lightheadedness; fainting; lack of concentration; blurred vision; dehydration; nausea; cold, clammy skin; shallow, rapid breathing; fatigue and depression. In general, low blood pressure i