Bouts of Arrhythmia?

Lately I've been experiencing what I think are occasional bouts of arrhythmia that are becoming increasingly more debilitating...uncomfortable episodes while walking that included heart palpitations, chest pressure, shortness of breath with more rapid breathing, and fatigue. An episode about two weeks ago was much worse than the first one I had because I also broke out into a sweat and lost my color. Then I had another less severe episode. My cardiologist thinks that I'm feeling the arrhythmias more because of worsening aortic stenosis. So the plan is to identify the type of arrhythmia in order to determine the right therapy. I will use a CEM (cardiac event monitor) for a month.