With my lipoprotein levels at 105 (0-30 normal range), the doctor...

With my lipoprotein levels at 105 (0-30 normal range), the doctor prescribed 10 mg Zocor. After a couple of weeks of taking it, I started experiencing skipping heart beats. No chest pain but I'm worried that when their side effects lists that muscles are affected, the heart is also affected since it is a muscle, right? Now, I'm about to go for the 2-D echo exam to look for the reason for this skipping heart beat and the new doctor wants me on Lipitor.