Will a Pulse Oximeter Detect Afib?

Hospital-grade pulse oximeters usually can read through perfusing cardiac arrhythmias such as atrial fibrillation and premature atrial or ventricular contractions.

Can pulse oximeter detect irregular heartbeat?

The pulse oximeter may also be inaccurate in bradycardia and irregular cardiac rhythms, because the device is not able to average the signal waveform in the set amount of time.

Does your oxygen level drop with AFib?

Fluid in the lungs is often a sign that AFib has advanced so much that it's led to heart failure. At this point, breathing can become labored because your lungs can't bring in or move out oxygen easily. And without a steady supply of oxygen, your muscles and organs will start to feel the fatiguing effects, too.