The values which you have mentioned are borderline high. Nothing to panic.
I understand that your spleen
is remover because of either an infection or immune syndrome. In both the cases monocytes will go up out of the range. It is a normal response.
patients are more prone for AF, that too if the valve is leaking too much. You have not mentioned weather your mitral valve is leaky. If you get dizzy or lightheaded, then consult cardiologist
, may be caused by some change in your heart rhythm.