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Normal Detector
The Normal Detector in the AliveECG app notifies you when a recording is normal .
This means that the heart rate is between 50 and 100 beats per minute, there are no or
very few abnormal beats, and the shape, timing and duration of each beat is considered
normal. It is important to remember that there is a wide range of normal variability
among different individuals. Changes in the shape or timing of an ECG might be normal
for a single individual, but since the AliveCor Mobile ECG is used by a large and diverse
population, the Normal Detector has been designed to be conservative with what it
detects as normal.
If you have been diagnosed with a condition that affects the shape of your ECG (e.g.,
intraventricular conduction delay, left or right bundle branch block, Wolff-Parkinson-
White Syndrome, etc.), experience a large number of premature ventricular or atrial
contractions (PVC and PAC), are experiencing an arrhythmia, or took a poor quality
recording it is unlikely that you will be notified that your ECG is normal.
It is also important to note that the Normal Detector looks at the entire signal before
determining if it can be declared to be normal. If you experience a small number of PACs
or PVCs in a recording of otherwise normal beats in normal rhythm, the Normal
Detector will likely declare this recording to be normal.
WARNING: AliveCor cannot guarantee that you are not experiencing an arrhythmia or
other health condition when labeling an ECG as normal. You should notify your doctor of
a possible change in your health.
Interference Detector
The Interference Detector in the AliveECG app determines whether a recording can be
accurately interpreted or not. After you take an ECG, if interference is detected you will
be notified within the app that your recording is Unreadable and given some
suggestions for acquiring the best quality ECG recording. You subsequently have the
option to Save the recording, or Try Again. If the recording can be analyzed, the AF and
Normal Detectors will run on the ECG and inform you as described above.
WARNING: The Interference Detector may incorrectly identify ventricular flutter,
ventricular bigeminy and ventricular trigeminy as unreadable. If you have been
diagnosed with one or more of these arrhythmias, we recommend turning off the
Interference Detector in your Settings.
What is Atrial Fibrillation?
The most common type of non-sinus tachyarrhythmia is atrial fibrillation. In this
case, disorganized electrical impulses that originate in the atria and pulmonary
veins initiate the electrical activity in the conduction system of the heart. This
causes what are commonly termed as irregularly irregular heart beats.
