Factors That Can Exaggerate Blood Pressure Readings - CVG Cares (2024)

10/14/2019

What You Need to Know About Heart Conditions

When you go to the doctor’s office, blood pressure measurement is one of the ways doctors can check up on your heart health. The only way to diagnose high blood pressure, known as hypertension, is by a blood pressure test. Blood pressure readings are typically taken at the start of your doctor’s appointment.

A healthy blood pressure reading is anywhere between 90/60 and 120/80. To understand your blood pressure reading, you need to know the difference between diastolic and systolic blood pressure. The first number is the systolic blood pressure which measures how much pressure your blood is exerting against the artery walls when your heart is beating. The second number is the diastolic blood pressure which indicates how much pressure your blood is exerting against your artery walls while the heart is resting between beats.

Anything 140/90 or above is considered a high blood pressure reading, which could be a diagnosis of hypertension. Hypertension is one of the leading causes of heart disease that can lead to heart attacks, kidney failure, stroke, and even dementia. If your blood pressure measures below 90/60, that could be an indicator of hypotension, or low blood pressure, which can result in dizziness, fainting, and long-term damage to the heart and brain.

Because of the associated risks, a higher or lower than normal blood pressure reading in a healthy adult can be alarming. Blood pressure can be influenced by risk factors such as weight loss or weight gain, diet, and physical activity. While an unhealthy lifestyle can cause hypertension, blood pressure readings may falsely indicate hypertension.

But did you know there are a number of factors that can cause a temporary spike or drop in your blood pressure that leads to a false reading? Fortunately, there are plenty of ways to prepare for your test to ensure an accurate reading. Learn about these factors to better prepare for your next blood pressure reading.

Stress and Anxiety

If you are experiencing stress immediately before or during a blood pressure test, the spike in cortisol levels will cause your heart rate to increase and could result in a higher blood pressure measurement. Sometimes, just the anxiety caused by being at the doctor’s office- often referred to as white coat hypertension– can also cause your blood pressure to rise.

While anxiety and stress is not a factor for chronic hypertension, it can influence your blood pressure at the time of the reading. When you are under stress, your body releases cortisol- a stress hormone that may temporarily raise your blood pressure. Try to decrease stress levels by taking deep breaths before and during your test.

Factors That Can Exaggerate Blood Pressure Readings - CVG Cares (1)

A Full Bladder

When your bladder is full, and the pressure on your kidneys exert pressure on your blood vessels. Having a full bladder during your blood pressure test can add up to 10 to 15 points. Be sure to use the restroom before getting your blood pressure taken to ensure you receive an accurate reading.

Crossed Legs

Crossing your legs during a blood pressure reading can raise your results by 2 to 5 points. The nurse will usually remind the patient to be sure to sit with your legs uncrossed and feet flat on the ground during your blood pressure test. Make sure that your legs are not crossed during the reading to ensure accurate blood pressure readings and avoid a false hypertension reading.

Blood Pressure Cuff Placement

Most blood pressure reading errors are the result of improper sizing of the blood pressure cuff or placing the cuff over clothing. Improper placement of the cuff over clothing can cause your blood pressure measurement to increase by 10 to 50 points. If the cuff is too small, it can add 2 to 10 points to your bp measurement. Be sure to roll up your sleeve for a blood pressure test and also let your doctor know if the cuff feels too tight around your arm.

Eating (Or Not Eating)

Right after eating a meal, your blood pressure will often read lower than normal because digesting food actually lowers your blood pressure. If you are taking your blood pressure at home, your doctor will usually recommend that you take your blood pressure test in the morning before eating or wait thirty minutes after a meal. Not eating enough or fasting can also cause an inaccurate reading. Your diet can play a big role in managing your high blood pressure. To exercise long-term hypertension treatment, be sure to eat whole foods that are proven to lower high blood pressure.

Alcohol, Caffeine, and Tobacco

Consumption of alcohol, caffeine and tobacco cause your blood pressure to immediately rise. Avoid alcohol, caffeine and smoking at least 30 minutes before your blood pressure test to ensure an accurate measurement.

Too Much Talking

Research has shown that even talking during a blood pressure test can increase your reading. Talking to your nurse or doctor during the test could raise your measurement 10 to 15 points. Stay quiet at the time of your blood pressure reading for a more accurate measurement.

Cold Temperatures

Being cold can also cause your blood pressure to spike. When blood vessels contract due to lower temperatures, the blood pressure readings may increase because the blood requires more pressure to flow through the more narrow blood vessels. Be aware that if you are feeling chilly at the doctor’s office during a blood pressure test, your measurement may be a little higher than normal.

Even if your blood pressure is normal, it is important to know what can exaggerate the measurement. In order to avoid misdiagnosis of hypertension, it is important that you and your doctor are aware of the factors that could cause exaggerated blood pressure results. With all of these factors in mind, you can be sure that your blood pressure is being measured properly. Learn more about blood pressure management and heart health with CVG today.

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Factors That Can Exaggerate Blood Pressure Readings - CVG Cares (2024)

FAQs

Factors That Can Exaggerate Blood Pressure Readings - CVG Cares? ›

Alcohol, Caffeine, and Tobacco

What can exaggerate blood pressure readings? ›

Acute meal ingestion, caffeine or nicotine use can all affect BP readings, leading to errors in measurement accuracy. If the patient has a full bladder, that can lead to an error in systolic BP of up to 33 mm Hg, and the white-coat effect can have an error of up to 26 mm Hg.

What are 3 factors that may lead to inaccuracy when recording blood pressure? ›

Health care providers can make measuring BP error free by avoiding the following pitfalls:
  • Inadequate BP equipment. ...
  • Incorrect positioning. ...
  • Improper cuff bladder size. ...
  • Incorrect technique. ...
  • At least two readings are recommended (separated by 10-15 minutes if possible).

What factors may impact the accuracy of the blood pressure reading? ›

Key for errors: 1) Patient's arm is unsupported; 2) Patient's back is unsupported; 3) Patient is talking; 4) Patient is engaged in active listening; 5) Wrong size cuff in use (“miscuffing”); 6) Blood pressure cuff is positioned too low on the upper arm; appears to be over the elbow; the artery marker on the cuff is ...

What are 3 factors that may change a blood pressure reading? ›

Poor diet, lack of exercise and certain lifestyle factors can affect blood pressure pattern, including:
  • Night-shift work.
  • Smoking.
  • Overweight or obesity.
  • Stress and anxiety.
  • Not taking medications for blood pressure or sleep apnea as directed, or ineffective treatment.

What are the causes of a falsely high blood pressure reading quizlet? ›

  • Cuff too wide. False-low reading.
  • Cuff too narrow or too short. False-high reading.
  • Cuff wrapped too loosely or unevenly. False-high reading.
  • Deflating cuff too slowly. False-high diastolic reading.
  • Deflating cuff too quickly. ...
  • Arm below heart level. ...
  • Arm above heart level. ...
  • Arm not supported.

Can tight cuff cause a high reading? ›

In study 1, we found that appropriately sized cuffs, whether wrapped tightly or loosely, gave correct BP readings. Cuffs snugly wrapped, but too small for the subject, gave high BP readings, on the average by approximately 10 mm Hg.

Which of the following may cause a falsely high blood pressure reading in a client? ›

Inflating the cuff too slowly or not inflating it to a high enough pressure may cause a false reading. If you loosen the valve too much, you will not be able to measure your blood pressure. The procedure may be done two or more times.

What are the external factors affecting blood pressure? ›

Environmental factors which cause blood pressure changes are climate, temperature and time of day. There are also age and sex differences in blood pressure.

What are the four main factors affecting blood pressure? ›

Five factors influence blood pressure:
  • Cardiac output.
  • Peripheral vascular resistance.
  • Volume of circulating blood.
  • Viscosity of blood.
  • Elasticity of vessels walls.

What is an alarming diastolic number? ›

Even higher blood pressure (with the systolic blood pressure 180 or higher, the diastolic blood pressure more than 120, or both) is called a hypertensive urgency if there are no related symptoms.

What are 10 factors that influence blood pressure? ›

What are the risk factors?
  • Age. Blood pressure tends to increase with age. ...
  • Family history and genetics. High blood pressure often runs in families. ...
  • Lifestyle habits. ...
  • Medicines. ...
  • Other medical conditions. ...
  • Race or ethnicity. ...
  • Sex. ...
  • Social and economic factors.
Mar 24, 2022

What are the 7 factors that affect blood pressure? ›

Risk factors
  • Age. The risk of high blood pressure increases with age. ...
  • Race. High blood pressure is particularly common among Black people. ...
  • Family history. ...
  • Obesity or being overweight. ...
  • Lack of exercise. ...
  • Tobacco use or vaping. ...
  • Too much salt. ...
  • Low potassium levels.

What factors can influence resting BP values and potentially cause misinterpretation? ›

Arterial BP values are subjective and depend on many factors, including the physics and physiology of the body; body position; brain activities; digestive activities; muscle activities; nerval stimulations; environmental factors (air temperature and audio noise level); smoking; alcohol and coffee consumption; and ...

Do muscular arms affect blood pressure readings? ›

A high upper arm muscle mass index correlates to over-estimate of systolic blood pressure and under-estimate of diastolic blood pressure.

What time of day is your true blood pressure? ›

Proper timing: Blood pressure is often highest early in the morning – 5 a.m. or 6 a.m. – so choose another time to take it. Be consistent: Take your blood pressure at the same time of day. Discuss with your health care provider how often you should measure your blood pressure.

What not to do before blood pressure test? ›

Do not smoke, exercise or use caffeine for 30 minutes to an hour before the test. Such activities increase blood pressure and heart rate. Wear a short-sleeved shirt so that the blood pressure cuff can be placed more easily around your arm.

Can anxiety cause false blood pressure readings? ›

Patients often are nervous about what their blood pressure will be when it's measured at their doctor's office, and that anxiety causes their blood pressure to go up. It's known as “white coat hypertension,” and it's particularly common among elderly patients.

Can you take your blood pressure too many times in a row? ›

Juraschek. That means taking your blood pressure four times a day — twice in the morning and twice in the evening — for seven days in a row. However, even 12 measurements over three days is reasonable, especially if you include one weekend day, Dr. Juraschek says.

How do I relax before blood pressure reading? ›

Our tips to help you relax before taking your blood pressure:
  1. Clear your mind. ...
  2. Skip on your morning coffee. ...
  3. Spend some time with your furry friends. ...
  4. Avoid salty foods. ...
  5. Make sure you go to the bathroom. ...
  6. Don't take your blood pressure right after exercise. ...
  7. Try not to drink before taking your blood pressure.

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