False irregular heartbeat on blood pressure monitor

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False irregular heartbeat on blood pressure monitor

False irregular heartbeat on blood pressure monitor

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Highlights

National Institute for Health and Care Excellence recommends Microlife WatchBP for atrial fibrillation screening during blood pressure measurement

Meta-analysis showed a sensitivity of 0.98 (95% CI 0.95, 1.00) and specificity 0.92 (0.88, 0.96) for detecting atrial fibrillation with this monitor

Interpretation of blood pressure measurement during atrial fibrillation

Recommendations for screening of atrial fibrillation from scientific societies

Recommendations for atrial fibrillation detection with automated blood pressure measurement.

Abstract

Several guidelines recommend opportunistic screening for atrial fibrillation (AF) in subjects aged ≥ 65 years using pulse palpation during routine blood pressure (BP) measurement. However, this method has limited diagnostic accuracy. A specific algorithm for AF detection during automated BP measurement was developed and implemented in a novel oscillometric device (Microlife WatchBP Home-A). In 2013, the UK National Institute for Health and Care Excellence (NICE) recommended this device for AF screening during routine office BP measurement in primary care in subjects ≥ 65 years. A review and meta-analysis of the evidence on the diagnostic accuracy of this algorithm were performed. Six studies (n = 2332) investigated the accuracy of AF detection using the Microlife BP monitor and estimated a pooled sensitivity at 0.98 (95% CI 0.95, 1.00) and specificity 0.92 (0.88, 0.96). Analysis of 4 studies (n = 1126) showed more readings to improve specificity (from 0.86 to 0.91) and sensitivity (from 0.97 to 0.99). Taking 3 sequential readings with at least 2 detecting AF gave the highest diagnostic accuracy. A single study (n = 139) of paroxysmal AF screening with home BP monitoring (3316 days) showed sensitivity 99% and specificity 93%. Another study (n = 46) of AF screening with 24 h ambulatory BP monitoring showed that AF detected in > 15% of all readings has high probability of AF diagnosis requiring confirmation by 24 h electrocardiography. AF detection with routine automated BP measurement is a reliable screening tool in the elderly, which requires confirmation by electrocardiography. Paroxysmal AF might also be detected by routine automated home or ambulatory BP monitoring.

Keywords

Arrhythmia

Blood pressure monitoring

Self-measurement

Home blood pressure

Clinic

Stroke

Cited by (0)

Copyright © 2015 The Authors. Published by Elsevier Ireland Ltd.

Having a hiccup in your heart rhythm can be uncomfortable – as well as frightening. But when does an extra heartbeat or other unexpected feeling warrant a visit to your doctor?

John Hummel, MD, a heart rhythm specialist at the Richard M. Ross Heart Hospital, sheds some light on irregular heart rhythms, or types of arrhythmias, which are fairly common.

“It can be tempting to jump to the worst-case scenario when it comes to your heart, and to think that an irregular heartbeat is a sign of a serious disease,” says Dr. Hummel. “But it doesn't always require treatment.”

The possible causes of an irregular heartbeat can vary widely – from too much caffeine to a more potentially dangerous condition of having your blood pressure skyrocket or plummet.

There are several types of irregular heartbeats. Dr. Hummel explains some people experience an extra heartbeat, a skipped beat, too fast of a beat (called tachycardia) or too slow of a beat (called bradycardia).

When to see a doctor immediately?

Dr. Hummel says it can be difficult for most people to know if an irregular heartbeat is a sign of something more serious.

Go immediately to the doctor if you have additional symptoms with your irregular heartbeat or you’ve had a heart attack or other heart stress. According to Dr. Hummel, those symptoms include fainting, dizziness, chest pain, swelling in your leg or shortness of breath.

“There’s a big difference between sitting in a chair and noticing your heart skipping and having fluttering that makes you feel like I’m going to pass out,” says Dr. Hummel.

“The other issue is whether your heart is structurally normal. If it’s not, abnormal heart rhythms more commonly will increase your risk of stroke or sudden death.”

Look at your actions and environment

Dr. Hummel says external factors could be causing disruptions in your heart rhythm:

  • Too much caffeine or alcohol
  • Dehydration
  • Drug abuse
  • Fever
  • Anemia
  • Emotional distress
  • Sleep apnea
  • Pregnancy
  • Eating or exercising

Dr. Hummel advises you make notes of when you experience irregular heartbeats and share this information with your doctor. Remember, not all unusual heart rhythms will require treatment. "Abnormal heartbeats can come and go, especially in young people,” states Dr. Hummel.

What type of tests can help diagnose an irregular heartbeat?

The first test is usually an echocardiogram, which looks at the structure and function of your heart. You may have an exercise stress test on a treadmill or stationary bike to measure your heart’s response to exertion. Patients might also be asked to wear a portable monitoring device (called a Holter monitor) for 24 to 48 hours that records every heartbeat and monitors for irregular heart rhythm.

“We have a wide range of diagnostic tools and we work to figure out what the cause is by looking at your actions and your medical history,” explains Dr. Hummel. He points out some people may have an inherited abnormal heart rhythm. Learn more about genetic heart testing.

The bottom line on your irregular heartbeat

  • If you have skipped heartbeats, you need to pay attention to your body and then get an assessment.
  • The urgency of that assessment is determined by whether you have additional symptoms or structural heart disease.

How accurate is irregular heartbeat on blood pressure monitor?

On the other hand, 12 patients with basic rhythm: sinus rhythm were incorrectly referred to as “atrial fibrillation”. In summary, the device has a diagnostic accuracy of 87.88% with a sensitivity of 100% and a specificity of 84.8%.

Why does my blood pressure monitor says irregular heartbeat?

Things that can cause an irregular heartbeat (arrhythmia) include: Current heart attack or scarring from a previous heart attack. Blocked arteries in the heart (coronary artery disease) Changes to the heart's structure, such as from cardiomyopathy.

Can blood pressure monitor give false readings?

Acute meal ingestion, caffeine or nicotine use can all negatively 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 between 4 mm Hg and 33 mm Hg, compared with the white-coat effect can have an error of up to 26 mm Hg.

What should I do if my blood pressure machine shows an irregular heartbeat?

Go immediately to the doctor if you have additional symptoms with your irregular heartbeat or you've had a heart attack or other heart stress. According to Dr. Hummel, those symptoms include fainting, dizziness, chest pain, swelling in your leg or shortness of breath.