June 11, 2026
Atrial Fibrillation vs Irregular Pulse: Are Blood Pressure Monitors Useful for Home Screening?
Irregular pulse can be a sign of an arrhythmia. An arrhythmia is any abnormal heart rhythm. Atrial Fibrillation (AFib) is the most frequent cardiac arrhythmia and a major risk factor for stroke.
More than 40 million people worldwide are living with AFib, with projections of a 60% increase by 2050. While AFib can only be diagnosed by a physician, early identification is crucial. Many people with AFib experience no symptoms and may be unaware of the condition until a stroke or another complication occurs. Home screening with an AFib-detection blood pressure monitor, followed by appropriate medical evaluation and treatment, can significantly reduce the risk of AFib-related stroke.
In fact, research suggests that automated home blood pressure monitors have high diagnostic accuracy for detecting AFib and may be used as reliable screening tools for early diagnosis.
What is Arrhythmia and What Types of Arrhythmias Exist?
Our hearts need to beat regularly in order to pump blood around the body. There is an electrical system in place that sends out impulses for a regular heartbeat. An abnormal heart rhythm results from these electrical impulses not working properly, making the heart beat too slow, too fast or irregularly.
Arrhythmias can be classified by either heart rate or the part of the heart where the abnormal rhythm originates. Common types include:
| Tachycardia |
A heartbeat that is too fast, typically more than 100 beats per minute while at rest. |
| Bradycardia |
A heartbeat that is too slow, typically fewer than 60 beats per minute while at rest. |
| Supraventricular Arrhythmias |
Arrhythmias that originate in the atria (upper chambers of the heart). This category includes Atrial Fibrillation, the most common cardiac arrhythmia. |
| Ventricular Arrhythmias |
Arrhythmias that originate in the ventricles (lower chambers of the heart). These can be life-threatening and often require immediate medical attention. |
Note: Heart rate thresholds may vary by age, fitness level, and medical condition. For example, children typically have higher resting heart rates, while trained athletes often have lower resting heart rates than the general population.
So, AFib occurs when the heart's upper chambers (atria) beat irregularly and out of sync with the lower chambers. Some people experience symptoms such as palpitations, fatigue, shortness of breath, or dizziness, while others have no symptoms at all. If left untreated, AFib can increase the risk of stroke, heart failure, and other serious complications.
How Healthcare Professionals Diagnose Atrial Fibrillation
Atrial fibrillation is often first suspected when a healthcare professional detects an irregular pulse during a physical examination, routine health check-up, or blood pressure measurement. Because an irregular pulse can have many causes, additional tests are usually required to confirm the diagnosis and assess heart function.
Common diagnostic tests include:
• Electrocardiogram (ECG) – records the heart's electrical activity and is the primary tool used to diagnose AFib.
• Echocardiogram – uses ultrasound to evaluate the heart's structure and function.
• Chest X-ray – may be used to examine the heart and lungs and identify other conditions that could affect heart rhythm.
• Blood tests – help identify underlying conditions that may contribute to AFib, such as thyroid disorders or electrolyte imbalances.
The Evolution of AFib Screening and Monitoring: From Irregular Pulse to Connected Health Platforms
BPMs with AFib detection function can be used to detect AFib early. From a technical perspective, they detect signs of possible AFib using the oscillometric method and a specialized algorithm rather than directly recording the heart's electrical activity like an ECG. To achieve high sensitivity and specificity, AFib detection algorithms typically analyze multiple blood pressure measurements rather than relying on a single reading.
2001 – Irregular Heartbeat (IHB) detection is pioneered by A&D in a blood pressure monitor.
2009 – An early landmark study validating automated AFib detection during blood pressure measurement is published.
2012 – Microlife introduces the industry's first blood pressure monitor with dedicated AFib detection technology.
2013 – The UK National Institute for Health and Care Excellence (NICE) recommends the Microlife WatchBP Home A device for AF screening during routine blood pressure measurements in primary care.
2017 – A study by A&D and Jichi Medical University School of Medicine demonstrates the diagnostic accuracy of a new AFib detection algorithm for home blood pressure monitors.
2019 – The Apple Heart Study, involving more than 400,000 participants, demonstrates the ability of wearable technology to identify possible AFib.
2024 – OMRON announces new home blood pressure monitors featuring FDA-authorized IntelliSense™ AFib technology, which incorporates machine learning.
2026 – The MedM health monitoring platform adds support for the possible AFib detection feature available in compatible blood pressure monitors.
Core Differences Between Irregular Pulse and AFib Detection Algorithms
One of the key advantages of AFib detection algorithms is their ability to distinguish atrial fibrillation from other causes of an irregular pulse. While a standard irregular heartbeat indicator may be triggered by premature beats, normal rhythm variations, or movement during measurement, AFib detection algorithms have demonstrated high sensitivity and specificity in clinical studies, often exceeding 95% when compared with ECG-confirmed diagnoses.
|
Irregular Pulse Detection (IHB/IPRS) |
AFib Detection | |
| Purpose |
Detects general pulse irregularities |
Screens specifically for possible AFib |
| What it looks for |
Variations in heartbeat intervals |
Patterns characteristic of atrial fibrillation |
| Measurements required |
Often a single blood pressure measurement |
Usually multiple (at least three) consecutive measurements |
| Accuracy |
May be triggered by premature beats, movement, or other rhythm irregularities |
Clinically validated against ECG and designed to minimize false positives |
| Clinical value |
Indicates that an irregular rhythm may be present |
Helps identify individuals who should seek medical evaluation for possible AFib |
In short, an irregular pulse indicator serves as a general warning that the heartbeat was not regular during measurement, while an AFib detection algorithm is specifically designed to identify patterns consistent with atrial fibrillation. Neither feature can diagnose AFib, but AFib-specific algorithms provide a more reliable screening tool and should always be followed by medical evaluation.
