Diastolic pressure lower than 60 mmHg is generally regarded as serious. Thus, a diastolic pressure of 64 mmHg is not too low. There may, however, be individual variations. Hence, if you have any symptoms of low blood pressure such as dizziness, confusion, sweating, blurred vision, or unusual thirst, you must seek medical help.
Low diastolic pressure in the absence of low systolic pressure is called isolated diastolic hypotension. It is defined as a diastolic blood pressure of less than 60 mmHg along with a systolic blood pressure of more than or equal to 100 mmHg.
What is diastolic blood pressure?
Diastolic blood pressure means the blood pressure reading during the phase when your heart relaxes (diastole). Force of the blood against the walls of the arteries (the blood vessels carrying blood from the heart to other sites) in the body is called blood pressure. The heart pumps the blood into the arteries as it contracts (systole). This blood pressure reading when the heart is actively contracting to push out blood is called systolic blood pressure. When the heart is relaxing (diastole), some pressure is still exerted on the arterial walls by the blood they contain because of the elastic recoil of the blood vessels. This blood pressure is lower than systolic blood pressure and is called diastolic blood pressure.
Blood pressure is expressed in mmHg. This is because mercury (or Hg) was used in the first accurate pressure gauges and is still being used in medicine today as the standard unit of measurement for pressure. Whenever blood pressure is mentioned, systolic pressure generally precedes diastolic pressure.
- Thus, a blood pressure of 130/80 mmHg means systolic pressure is 130, whereas diastolic blood pressure is 80.
- A systolic blood pressure of less than 120 mmHg and diastolic blood pressure of lower than 80 mmHg is generally regarded as normal.
- A blood pressure reading lower than 90/60 mmHg is generally considered low blood pressure (hypotension).
Both diastolic blood pressure and systolic blood pressure determine the risk of cardiovascular diseases including ischemic heart disease (IHD) such as myocardial infarction or heart attack. According to recent studies, the risk of death from IHD and stroke doubles with every 20 mmHg systolic or 10 mmHg diastolic increase among people who are 40-89 years of age.
Is low diastolic blood pressure dangerous?
Low diastolic blood pressure may cause serious consequences. Diastole is the phase when your heart is relaxing. During this phase, the blood flows through the blood vessels supplying the heart (coronary arteries) to deliver oxygen and nutrients to the heart.
- Low diastolic pressure may reduce the flow of blood through the coronary arteries thereby increasing the risk of lowered oxygen and nutrient supply to the heart. There is an especially higher risk of reduced oxygen and nutrient delivery to the endocardium or the innermost layers of the heart (endocardial ischemia).
- Low diastolic blood pressure is also a marker for widened pulse pressure. Pulse pressure is defined as the difference between your systolic blood pressure and diastolic blood pressure. Widened pulse pressure is considered an indicator of increased arterial stiffness and hardening of the arteries caused by fat deposition (atherosclerosis).
- Furthermore, low blood pressure may increase the risk of falls or accidents because it may cause dizziness or fainting. Thus, it is important to consult a doctor if your blood pressure (diastolic or systolic or both) is low or you have any symptoms of low blood pressure such as light-headedness, cold and clammy skin, difficulty in breathing, or fainting.
Health Solutions From Our Sponsors
Top Is a Diastolic Blood Pressure of 64 mmHg too Low? Related Articles
Blood Pressure PictureThe blood pressure is the pressure of the blood within the arteries. See a picture of Blood Pressure and learn more about the health topic.
What Does it Mean When the Bottom Number of Your Blood Pressure is Over 100?Diastolic blood pressure (DBP) is the pressure exerted on the walls of the arteries when the heart muscle relaxes between beats. When the bottom number of blood pressure (diastole) is over 100 mmHg, it may be called diastolic hypertension (DHT).
Can I Check My Blood Pressure With My Phone?The force of the blood against the walls of the blood vessels carrying blood from the heart to other sites in the body (the arteries) is called blood pressure. The heart pumps blood into the arteries as it contracts (systole).
Can You Take Turmeric if You Take Blood Pressure Medicine?Turmeric is one of the most used spices in Asian cuisine. This yellow spice has been hailed for its healing properties for centuries. A turmeric latte is touted for its myriad health benefits. Turmeric contains several anti-inflammatory compounds collectively called curcuminoids.
High Blood Pressure & BodyHigh blood pressure puts you at risk for a number of other conditions. Here's what to look out for.
High Blood PressureWhat causes high blood pressure (hypertension)? Know the warning signs and symptoms of high blood pressure. Read about high blood pressure medications, diet, and long term treatments.
HBP QuizTake this quiz and test your IQ of high blood pressure (hypertension), the cardiovascular disease that causes most strokes and heart attacks. How are dizziness, snoring, and gout related to HBP? Find the answer and learn how medical treatments and lifestyle adjustments fight this common problem.
How Do I Know If I Have High or Low Blood Pressure Numbers?High or low blood pressure can lead to serious health conditions. Learn more about what you should do if your pressure is outside the ideal range.
How Do You Get the Bottom Blood Pressure Number Down?To get your diastolic blood pressure to go down, you can’t target it alone. You will need to work on getting your overall blood pressure lower. Here are 13 lifestyle changes that can help you lower your blood pressure.
Low Blood Pressure (Hypotension)Low blood pressure, also referred to as hypotension, is blood pressure that is so low that it causes symptoms or signs due to the low flow of blood through the arteries and veins. Some of the symptoms of low blood pressure include light-headedness, dizziness, and fainting if not enough blood is getting to the brain. Diseases and medications can also cause low blood pressure. When the flow of blood is too low to deliver enough oxygen and nutrients to vital organs such as the brain, heart, and kidneys; the organs do not function normally and may be permanently damaged.
Low Blood Pressure (Hypotension) CausesLow blood pressure (hypotension) occurs when blood pressure drops below the normal range. Low blood pressure can be temporary, or it can be a chronic (long-lasting) condition.
Low Blood PressureWhat is low blood pressure (hypotension)? Explore low blood pressure causes, symptoms, and signs. Discover what is considered low blood pressure.
Lower Your BP ExercisesTrying to lower high blood pressure (hypertension)? Discover exercises good for lowering blood pressure, along with other lifestyle changes and medications to prevent high blood pressure.
What Causes Low Blood Pressure in Pregnancy?
What Foods Are Good If You Have Low Blood Pressure?What is low blood pressure and what causes it? Learn the signs and symptoms of low blood pressure and what you can do to treat it.