I'm A 57 Year Old Male, 185 Pounds 5'11". I

I'm a 57 year old male, 185 pounds 5'11". I have irregular heart beats - skipped beats- double beats- when I'm in bed and for the first few hours of the day. My pulse rates are normal, typically 59-79 beats per minute and my blood pressure is somewhat normal in fact it's often low which I need to talk to my PCP about. Started on 40mg of Micardis for my BP. I have been doing 10 mile, 46 minute rids on my stationary bike. No symptoms bp normal and heart rate when through is between 81-95 beats per minute.