The normal blood pressure in an infant varies as they grow and needs to be measured by a special in-dwelling intra-arterial catheter in an intensive care unit setting. There may also be slight variations in the normal average blood pressure in infants.
- The average blood pressure in a newborn baby is about 64/41 mmHg (millimeters of mercury).
- For infants aged one month and above, the average blood pressure is about 95/58.
The first number expresses the systolic blood pressure, whereas the second number depicts the diastolic blood pressure.
- Systolic blood pressure refers to the blood pressure recorded while your heart is actively pumping blood or contracting (systole).
- Diastolic blood pressure refers to the blood pressure while your heart is relaxing between heartbeats (diastole).
The normal blood pressure in infants at different stages of life is seen below:
|Age||Average blood pressure (mmHg)|
|Systolic blood pressure||Diastolic blood pressure|
|0 to 6 months||65 to 90||45 to 65|
|6 to 12 months||80 to 100||55 to 65|
What are the signs of high blood pressure in an infant?
The signs of hypertension in infants vary depending upon the underlying cause. Some infants may not have any signs and symptoms.
When present, the signs of high blood pressure may include:
- Irritability or inconsolable crying
- Bluish skin
- Failure to gain weight or poor weight gain
- Pale skin
- Rapid breathing or trouble breathing
- Frequent urinary tract infections
- Poor stamina
If your infant has any of the above signs, you must contact your doctor. These signs may not be exclusively seen in high blood pressure, and consulting a doctor will help diagnose the cause.
What are the causes of high blood pressure in an infant?
Blood pressure means the force or pressure exerted on the walls of the arteries (blood vessels carrying blood from the heart to other organs and tissues) by the blood flowing in them. When the blood pressure increases more than normal, the condition is called hypertension or high blood pressure.
High blood pressure in an infant is generally caused by several congenital (present since birth) conditions affecting the heart or the kidneys.
The causes of hypertension in infants include:
- Bronchopulmonary dysplasia (a serious lung condition affecting newborns)
- Coarctation of the aorta (abnormal narrowing of the aorta, which is the blood vessel carrying blood from the heart)
- Injury to the blood vessels in the kidneys due to umbilical artery catheterization (a procedure done in neonatal intensive care units to collect blood samples from the baby and monitor their blood pressure)
- Certain medications such as steroids, caffeine, theophylline, and beta-agonists
- Hormonal abnormalities such as hyperthyroidism or congenital adrenal hyperplasia
- Renal artery stenosis (abnormal narrowing of the blood vessel carrying blood to the kidney)
- Renal vein thrombosis (blood clot in the vein carrying blood from the kidney)
- Polycystic kidney disease (a type of congenital abnormality of the kidney)
- Urinary tract obstruction
- Intracranial hemorrhage (bleeding in or around the brain)
- High serum calcium
- Certain tumors such as pheochromocytoma, Wilms tumor, and neuroblastoma
- Maternal drug abuse during pregnancy
Health Solutions From Our Sponsors
Top What Is the Normal Blood Pressure for an Infant Related Articles
What Is the Normal Blood Pressure Range?Blood pressure is the force applied by the blood over the inner walls of the arteries. Although the average blood pressure for a person remains constant, it shows minor fluctuations throughout the day—declining while relaxing and momentarily increasing while being excited or under stress. An increase in the resting blood pressure can scar, stiffen, or harden the arteries.
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.
Can Drinking Water Lower Your Blood Pressure?Keeping well hydrated by drinking six to eight glasses of water daily (even more if working in hot and humid conditions) is beneficial for the blood pressure. High blood pressure (BP) or hypertension is a condition caused by the persistent high pressure of blood against the walls of arteries. It is also called systolic pressure (constantly greater than 139 mmHg) or diastolic pressure (constantly more than 89 mmHg).
High Blood Pressure (Hypertension)
High blood pressure (hypertension) is a disease in which pressure within the arteries of the body is elevated. About 75 million people in the US have hypertension (1 in 3 adults), and only half of them are able to manage it. Many people do not know that they have high blood pressure because it often has no has no warning signs or symptoms.
Systolic and diastolic are the two readings in which blood pressure is measured. The American College of Cardiology released new guidelines for high blood pressure in 2017. The guidelines now state that blood normal blood pressure is 120/80 mmHg. If either one of those numbers is higher, you have high blood pressure.
The American Academy of Cardiology defines high blood pressure slightly differently. The AAC considers 130/80 mm Hg. or greater (either number) stage 1 hypertension. Stage 2 hypertension is considered 140/90 mm Hg. or greater.
If you have high blood pressure you are at risk of developing life threatening diseases like stroke and heart attack.
REFERENCE: CDC. High Blood Pressure. Updated: Nov 13, 2017.
What Is High Blood Pressure (Hypertension)? Symptoms, TreatmentsWhat causes high blood pressure (hypertension)? What is normal blood pressure? 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.
15 Surprising Things That Raise Your Blood PressureSalt, worry, and anger aren't the only things that can raise your blood pressure. Risk factors like loneliness and birth control may also affect blood pressure. See what else can bump your numbers up.
Which Is More Important: Systolic or Diastolic Blood Pressure?Systolic blood pressure is often given more attention as a risk factor for heart disease. However, both systolic and diastolic blood pressure are equally important in monitoring the health of your heart.
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 PressureWhat is low blood pressure (hypotension)? Explore low blood pressure causes, symptoms, and signs. Discover what is considered low blood pressure.
How to Lower Blood Pressure: Exercise TipsTrying 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 Diastolic Blood Pressure?A diastolic blood pressure (DBP) of somewhere between 60 and 90 mm Hg is good in older people. Causes of low DBP include bed rest, dehydration, loss of water, alcohol use, hormone deficiencies, allergic reactions, nutritional deficiencies and prolonged standing leading to blood pooling in the legs.
What Is the Proper Way to Take Your Blood Pressure?If you want to monitor your blood pressure on a regular basis, you can do so at home easily using an automated or digital blood pressure machine. Here’s how to make sure your at-home reading is accurate.
Which Blood Pressure Number Is the Most Important?The blood that flows through the arteries (blood vessels carrying blood from the heart to other parts of the body) exerts pressure against the arterial walls. The number above (120) is called the systolic blood pressure and the number below (80) is called the diastolic blood pressure. Though both readings are important, many doctors believe that systolic blood pressure is a better predictor of complications of hypertension, such as heart disease or stroke.
Why Is My Bottom Blood Pressure Number High?Isolated diastolic hypertension (IDH) occurs when your systolic blood pressure is normal, and only your diastolic blood pressure is high (over 80 mm Hg). Causes of high diastolic blood pressure include a high-sodium diet, obesity, lack of physical activity, excessive alcohol consumption, stress and anxiety.
Will Drinking Water Lower Blood Pressure?High blood pressure, or hypertension, is when the force of blood flowing through your blood vessels is consistently too high. Simply drinking more water without making other diet changes won't lower blood pressure.