“Atrial fibrillation with rapid ventricular rate (A-fib with RVR) is a type of irregular heart rhythm. With A-fib with RVR, your heart doesn’t have a normal signaling process telling your heart when to beat. Instead, signaling is disorganized and the parts of your heart beat out of sync. Medicines and procedures can help manage this condition.  They have a heart rate of 100 beats per minute or more.

When you have A-fib with RVR, it’s difficult for your heart to pump the amount of blood it should. That makes it hard for your body to get the oxygen-rich blood it needs to function.”

Cleveland Clinic (https://my.clevelandclinic.org/health/diseases/24578-atrial-fibrillation-with-rvr)

”