Atrial Fibrillation (AFib) Support Group
Atrial fibrillation (AF or afib) is an abnormal heart rhythm (cardiac arrhythmia) which involves the two small, upper heart chambers (the atria). Heart beats in a normal heart begin after electricity generated in the atria by the sinoatrial node spread through the heart and cause contraction of the heart muscle and pumping of blood.
Are you sure the Walmart machine is right? Stands to reason it may be defective.
Fibrillated beats do not make it strongly down to the extremities consistently and that is why no BP reading.
I also have an OMRON portable ECG and you can see the heartbeats (of course) and it gives you a rate for each beat... 67,112,74,98,72,110, etc (88 average for 30 seconds). Funny. :-)
Never had the BP machine problem at home though.