I was getting arrhythmias before surgery - probably PVCs, then after surgery. My mechanical aortic valve didn't seem to affect my heart rhythm. Then, a little over two months ago, I developed other rhythms. These were a severe combination, with rhythms competing with each other and, as a result, not much blood moving through me.
I had an angiogram, and needed a stent. The arrhythmias retreated, but didn't stop.
I had an ablation that stopped two of my arrhythmias, but a third ablation is very dangerous, and the electrophysiologist was reluctant to do it. Although the other arrhythmias were quiet, the PVC got more persistent, and I would have many pauses between beats.
My heart rate dropped fairly quickly, with long periods below 50 bpm, sometimes slightly above 30 bpm. With no delay, I got a pacemaker.
My point is this: although sometimes damage to the heart by surgical intervention can cause arrhythmias, there are times (like mine) where arrhtymias can happen long after surgery. Of course, I may have had these arrhythmias develop anyway - whether or not I had my aortic valve replaced.
GinaHMK - I'm hoping that when you got your valve replaced, it was a tissue valve. Eliquis hasn't been approved for mechanical valves. If your valve was mechanical, you should talk to your cardiologist about it. Although it may work - and is one of the anticoagulants that they use for A-Fib, there isn't enough evidence that it's safe for mechanical valves.