Hi Jothenurse.

Keep us updated on your Ativan tapering.   I tapered my low dose clonazepam just a tad the pm. dose as I sleep ok,  mornings to late afternoon are more anxious thoughts.  
Hearts must race so easily because 1. we think about it most of all things. 2. over sensitive to thinking tells our heart to rev up.

Doesn't the ativan calm your heart racing?   Clonazepam does for me and I chose it because I read it is good for anxious with cardiac symptoms. (racing)  I just keep worrying that if I wean off my racing will come back.   Yet I have at times felt happy happy late evening when the am dose should have worn off and my heart is just fine.
There is that power of thoughts again.  

I need to do some consistent scheduled walking myself to strengthen the heart, since it is a muscle.  I'm rather uncoordinated so walking is best exerecise for me and I really like it as I look around at the scenery.  I'm not into machines and gyms.  No $ for that in this economy.

Okay, the heart is simply responding to the demand for work. It does not indicate a problem at all and is extremely common in persons who do not regularly exercise. Evidence of accelerated pulse of increased cardiac force, ie poudning heart, is merely the body's way of increasing blood pressure and oxygen flow in order to meet the demands of exertion on the body.

Your Ativan withdrawal schedule is just fine and no complications will occur.

I see nothing here at all to suggest a problem.

Best regards and Good Health